diff --git a/.gitignore b/.gitignore
index a9ab479..2c54099 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,7 @@ cdb_*.txt
 .vs/
 *.user
 Thumbs.db
+__pycache__/
 
 # per-user input profile, written by the game on first PAD run (cwd=content)
 /content/bindings.txt
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 478527e..429076a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -164,7 +164,12 @@ add_library(munga_engine STATIC
   "engine/MUNGA/TERRAIN.cpp"
   "engine/MUNGA/TESTALL.cpp"
   "engine/MUNGA/TIME.cpp"
-  "engine/MUNGA/TIMESTUB.cpp"
+  # TIMESTUB.cpp REMOVED (2026-07-14): its GetRTC/GetHiRes were 2007 call-counter
+  # stubs (`return time++` -- the "clock" advanced per CALL, not per ms) that WON
+  # the /FORCE duplicate-symbol race over the REAL QueryPerformanceCounter clock
+  # in L4TIME.cpp (LNK4006 "second definition ignored").  Every Now()-domain
+  # consumer (dead-reckoning above all) ran on call-count pseudo-time -> the
+  # replicant stall/jump chop.  L4TIME.cpp covers every symbol TIMESTUB defined.
   "engine/MUNGA/TOOL.cpp"
   "engine/MUNGA/TRACE.cpp"
   "engine/MUNGA/TRACSTUB.cpp"
@@ -181,6 +186,7 @@ add_library(munga_engine STATIC
   "engine/MUNGA/WRHOUS.cpp"
   "engine/MUNGA_L4/DXUtils.cpp"
   "engine/MUNGA_L4/L4APP.cpp"
+  "engine/MUNGA_L4/L4AUDEFX.cpp"
   "engine/MUNGA_L4/L4AUDHDW.cpp"
   "engine/MUNGA_L4/L4AUDIO.cpp"
   "engine/MUNGA_L4/L4AUDLVL.cpp"
@@ -308,6 +314,7 @@ add_library(bt410_l4 STATIC
   "game/reconstructed/thermalsight.cpp"
   "game/reconstructed/torso.cpp"
   "game/reconstructed/btstubs.cpp"
+  "game/reconstructed/audiopresets.cpp"
   "game/reconstructed/dpl2d.cpp"
   "game/original/BT/BTMSSN.CPP"
   "game/original/BT/BTREG.CPP"
@@ -346,7 +353,6 @@ target_link_libraries(btl4 PRIVATE
     bt410_l4
     munga_engine
     "${CMAKE_SOURCE_DIR}/engine/lib/OpenAL32.lib"
-    "${CMAKE_SOURCE_DIR}/engine/lib/libsndfile-1.lib"
     "${DXSDK}/Lib/x86/d3d9.lib"
     "${DXSDK}/Lib/x86/d3dx9.lib"
     "${DXSDK}/Lib/x86/dinput8.lib"
@@ -372,9 +378,10 @@ if(BT412_STEAM)
             "$<TARGET_FILE_DIR:btl4>")
 endif()
 
-# Copy the third-party runtime DLLs next to the built exe.
+# Copy the OpenAL runtime DLL next to the built exe.  (libsndfile is gone: its
+# repo DLL was a no-op STUB -- L4AUDRES now loads the soundbank WAVs with an
+# in-tree RIFF/PCM reader, no external dependency.)
 add_custom_command(TARGET btl4 POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy_if_different
         "${CMAKE_SOURCE_DIR}/engine/lib/OpenAL32.dll"
-        "${CMAKE_SOURCE_DIR}/engine/lib/libsndfile-1.dll"
         "$<TARGET_FILE_DIR:btl4>")
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diff --git a/content/FOGDAY.EGG b/content/FOGDAY.EGG
new file mode 100644
index 0000000..ca86964
--- /dev/null
+++ b/content/FOGDAY.EGG
@@ -0,0 +1,244 @@
+[mission]
+adventure=BattleTech
+map=arena1
+scenario=freeforall
+time=day
+weather=fog
+temperature=27
+length=600
+[ordinals]
+bitmap=Ordinal::BitMap::1
+bitmap=Ordinal::BitMap::2
+bitmap=Ordinal::BitMap::3
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+x=128
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+[pilots]
+pilot=127.0.0.1:1502
+pilot=127.0.0.1:1602
+[127.0.0.1:1502]
+hostType=0
+advancedDamage=1
+loadzones=1
+name=Aeolus
+bitmapindex=1
+experience=expert
+badge=VGL
+patch=Yellow
+role=Role::Default
+dropzone=one
+vehicle=bhk1
+vehicleValue=1000
+color=White
+[127.0.0.1:1602]
+hostType=0
+advancedDamage=1
+loadzones=1
+name=Boreas
+bitmapindex=2
+experience=expert
+badge=VGL
+patch=Yellow
+role=Role::Default
+dropzone=one
+vehicle=ava1
+vehicleValue=1000
+color=Red
+[largebitmap]
+bitmap=BitMap::Large::Aeolus
+[BitMap::Large::Aeolus]
+bitmap=00000000000000000000000000000000
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+x=128
+y=32
+width=8
+[smallbitmap]
+bitmap=BitMap::Small::Aeolus
+[BitMap::Small::Aeolus]
+bitmap=00000000000000000000000000000000
+bitmap=0000000000000000003E00000C000000
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+bitmap=00631F0F8C7E3C000000000000000000
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+x=64
+y=16
+width=4
+[Role::Default]
+model=dfltrole
+[Role::NoReturn]
+model=noretun
diff --git a/content/LAST.EGG b/content/LAST.EGG
index 61255bd..72e7c5a 100644
--- a/content/LAST.EGG
+++ b/content/LAST.EGG
@@ -1,8 +1,8 @@
 [mission]
 adventure=BattleTech
-map=grass
+map=cavern
 scenario=freeforall
-time=day
+time=night
 weather=clear
 temperature=27
 length=600
@@ -156,8 +156,9 @@ x=128
 y=32
 width=8
 [pilots]
-pilot=200.0.0.96
-[200.0.0.96]
+pilot=127.0.0.1:1502
+pilot=127.0.0.1:1602
+[127.0.0.1:1502]
 hostType=0
 advancedDamage=1
 loadzones=1
@@ -171,6 +172,20 @@ dropzone=one
 vehicle=bhk1
 vehicleValue=1000
 color=White
+[127.0.0.1:1602]
+hostType=0
+advancedDamage=1
+loadzones=1
+name=Boreas
+bitmapindex=2
+experience=expert
+badge=VGL
+patch=Yellow
+role=Role::Default
+dropzone=one
+vehicle=ava1
+vehicleValue=1000
+color=Red
 [largebitmap]
 bitmap=BitMap::Large::Aeolus
 [BitMap::Large::Aeolus]
@@ -227,3 +242,4 @@ width=4
 model=dfltrole
 [Role::NoReturn]
 model=noretun
+
diff --git a/context/cockpit-view.md b/context/cockpit-view.md
index f787911..46a79f7 100644
--- a/context/cockpit-view.md
+++ b/context/cockpit-view.md
@@ -5,7 +5,7 @@ status: living
 source_sections: "task #55 (2026-07-10); reference/decomp part_007.c/part_013.c/part_014.c/part_011.c; engine/MUNGA_L4/bgfload.cpp, L4VIDRND.cpp; game/reconstructed/btl4vid.cpp"
 related_topics: [rendering, bgf-format, gauges-hud, subsystems, decomp-reference]
 key_terms: [material-ramp, siteeyepoint]
-open_questions: ["gyro tail: gait jolt/rumble [T3 gates], sway model, torso-pitch eye writer, damageForce fill", "exact authored frame colour: the unlit constant (0.13,0.12,0.15) is T3 tuned-to-footage (BT_COP_FRAME overrides; the ramp-index approach + BT_COP_RAMP_L are RETIRED)"]
+open_questions: ["gyro tail: gait jolt/rumble [T3 gates], torso-pitch eye writer, damageForce fill (sway model DONE: the mech instability model @0x3F0 feeds swayBias -- task #66)", "exact authored frame colour: the unlit constant (0.13,0.12,0.15) is T3 tuned-to-footage (BT_COP_FRAME overrides; the ramp-index approach + BT_COP_RAMP_L are RETIRED)"]
 ---
 # First-Person Cockpit: the *_cop Canopy + the Authentic Eyepoint
 
diff --git a/context/combat-damage.md b/context/combat-damage.md
index 372dae1..803ba8f 100644
--- a/context/combat-damage.md
+++ b/context/combat-damage.md
@@ -6,7 +6,7 @@ source_sections: "PROGRESS_LOG.md §10c; docs/HARD_PROBLEMS.md (P5)"
 related_topics: [subsystems, decomp-reference, reconstruction-gotchas, locomotion, rendering, translocation-warp, multiplayer]
 key_terms: [damage-zone, TakeDamage, viewpoint-entity, master, replicant]
 open_questions:
-  - "Per-impact aim (cylinder lookup); collision damage application; DeathShutdown + collapse anim"
+  - "Missile cluster-hit variance/concentration (task #60-D deferred); per-player splash enable sub-gate (Missile+0x360 [T3]); ~100pt ram lethality vs the pod unverified [T3]"
 ---
 
 # Combat & Damage
@@ -61,6 +61,16 @@ Fixed-torso mechs (the BLH: `TorsoHorizontalEnabled=0` — no jointtorso in the
 boresight dead-ahead. Once locked, `Emitter::FireWeapon` converges with NO aim/arc test
 (part_013.c:7758). `MechWeapon::UpdateTargetState` (`FUN_004b9bdc` [T1]): `targetWithinRange =
 dist < (1 − hostZoneDamage) × weaponRange`. The 0x388 WRITER is in the same un-exported gap.
+⚠ **`hostZoneDamage` is `Subsystem::damageZone->damageLevel` (weapon `@0xE0 → +0x158`), NOT
+heatLoad** — the port originally computed `effectiveRange = (1 − heatLoad) × weaponRange`
+(mechweap.cpp), the SAME `@0xE0`-DamageZone-vs-heat misattribution corrected in
+`HeatSink::UpdateCoolant`. For a charge/discharge weapon (ER laser) the weapon's own `heatLoad`
+swings 0→1 every cycle, so `effectiveRange` collapsed to ~0 and the weapon was perpetually "out
+of range" → `SendDamageMessage` never ran → NO damage and NO impact explosion (the "lackluster/
+absent laser hits, esp. the ER medium, on mechs AND buildings" report). FIXED 2026-07-15: read
+the QUALIFIED `this->Subsystem::damageZone->damageLevel`; an undamaged weapon now holds full
+STABLE `weaponRange`. Verified: laser `effRange` 500 stable (was 0/59/340/424), impact explosions
+13/22s (was ~2). [T2] See [[reconstruction-gotchas]] (`@0xE0` shadow/heat class).
 **Port status: RECONSTRUCTED + runtime-verified (tasks #36/#39/#58) [T2].** The chain: the
 cockpit eye inherits the twist AUTHENTICALLY through the draw traversal (`Torso::PushTwist` →
 hinge `rotationAmount` → `HingeRenderable::Execute` multiplies the live hinge into the matrix
@@ -104,6 +114,32 @@ bug was fixed en route: every
 renderable rebuild stomped `mCamera` back to the chase eye (btl4vid `mViewInside` now persists
 the chosen view — the aim camera feed and the V toggle both depend on it).
 
+**WORLD STRUCTURES ARE TARGETABLE via the STATIC COLLISION TREE (task #50, 2026-07-15) [T2].**
+The `BTGroundRayHit` "terrain" tier only samples the VISUAL heightfield, which on arena1 is a
+single flat `'sky'`-named ground mesh (`[visgnd] sampler ready: 1 terrain instances`) — and the
+class-42 map-instance stream (`BuildTables`) likewise holds only `'sky'`. So the garages/walls
+were invisible to the pick → shots passed through them, and only mechs moved the range axis (the
+user-reported regression). The FIX: the boresight now also ray-tests the **zone's static collision
+solid tree** — the SAME geometry that blocks the mech's walk. Mechanism is authentic engine code:
+`Mover::FindBoxedSolidHitBy` (MOVER.cpp) already tests movers, doors, AND the static world
+(`application->GetInterestManager()->GetInterestZone(interestZoneID)->GetCollisionRoot()->FindBoundingBoxHitBy(line)`).
+We factored its "test against the static world" tail into **`Mover::FindStaticSolidHitBy(Line*)`**
+(static solids only, no movers), wrapped by **`Mech::WorldStructurePick(start,dir,range,&hit)`**
+(mech.cpp — builds the world-space `Line`, reads the entry point back via `line->FindEnd` since
+`FindBoundingBoxHitBy`→`HitByBounded` clips `line->length = enter`). The pick order in mech4.cpp is
+now: closest MECH (`PickRayHit`, damage zones + lock) → closest STRUCTURE (`WorldStructurePick`,
+occludes a mech BEHIND it) → flat ground (`BTGroundRayHit`) → sky (fire-at-nothing). A structure
+hit designates `mech+0x388 = gBTTerrainEntity` (the no-damage-zone sentinel) + `0x37c` = the entry
+point, so the range caret reads the structure distance and NO lock ring draws (mech4.cpp:4529, the
+`des != hotTarget` branch), exactly the reported authentic behavior. ⚠ There is NO ray query
+against the ground/`containedByNode` `BoundingBoxTree` — `FindBoundingBoxUnder` is DOWNWARD-only
+(gravity/ground-snap: `*height = FindDistanceBelowBounded`), useless for a horizontal boresight;
+the static SOLID tree (`BoxedSolidTree::FindBoundingBoxHitBy`) is the only ray-vs-world query.
+Verified: a `BT_WSWEEP` horizontal ray-fan on arena1 tracks position (3/24 hits near the boundary
+→ 17-21/24 inside the interior garage cluster → 3/24 past it — discrete interior solids, not just
+an enclosing box), no crash. The interactive boresight (`BTGetAimRay`) can't be exercised headless
+(no window → `noRay`), so the SWEEP is the headless proof; interactive aim is user-verified.
+
 ## Firing arc + muzzles
 There is NO firing-arc field in the binary (`Emitter::FireWeapon` fires whenever HasActiveTarget) —
 the 1995 game got away with it because it was **cockpit-only** (a beam behind you is off-camera). The
@@ -112,6 +148,35 @@ port's external camera exposes it, so the arc is gated on the **torso twist rang
 (`BT_FIRE_ARC`, a labeled PORT presentation param). Beams fire from the mech's real gun-port SITE
 segments (siterugunport etc.) resolved via `GetSegment(name)→segmentToEntity×localToWorld`. [T2]
 
+## REAR-FIRE + look views (task #68, 2026-07-16) [T1]
+The pod had a rear arsenal + a five-state LOOK-VIEW system (all reconstructed + live):
+- **weapon.rearFiring @0x334** = the MOUNT SEGMENT page name contains 'b' (ctor marker @0x511aa2;
+  the back ports `sitelbgunport`/`siterbgunport`). Roster survey: **the Blackhawk's ERMLaser_2/3
+  are the ONLY rear weapons in the game** (both loadout variants; the Owens model HAS back ports
+  but mounts nothing on them; every missile rack is forward).
+- **mech.rearFiring @0x410** = OR of the weapons' flags (ctor part_012.c:10220).
+- The mapper look machine (part_013.c:396-459; modes 0=fwd 1=left 2=right 3=BACK 4=down from the
+  look buttons): on change it writes **EyepointRotation (mech+0x360)** — side yaw = the authored
+  per-mech look angles (model rec +0x50-0x5c → mech 0x564-0x570), look-back = yaw π + lookBackAngle
+  pitch — and re-arms each weapon's **viewFireEnable @0x3E0** (fwd = !rear, back = rear, else 0).
+  0x3E0 is the fire gate (the Loaded→Firing transition, part_013.c:7689 — the old
+  `useConfiguredPip` label) AND selects the HUD pips: the reticle registers each pip in group
+  1(front)/2(rear) from the RearFiring attr (part_014.c:5429-34) and draws the group in the mech's
+  reticleElementMask low bits (mech+0x390: fwd |1&~2, back |2&~1, part_013.c:5588-95).
+- Port: keyboard **HOLD 'V' = look back**; side/down looks not yet key-bound. `[rearfire]`/
+  `[look]` traces under BT_PROJ_LOG/BT_KEY_LOG.
+- Missile LAUNCH direction: rounds leave along the **mount segment's world frame** (the binary
+  spawns the missile with the full muzzle-segment AffineMatrix, fire builder @0x4bcc60:8762-64,
+  authored MuzzleVelocity composed with z NEGATED + the mech's own velocity) — was the
+  "missiles fire out of his back" torso-twist bug (launch followed the LEGS while the muzzle
+  followed the twist).
+- BANKED for the full Missile-entity revival (decoded, not yet ported — commit ab6ea83): the three
+  authentic performances — Seeker 0x4be9a0 (aim = target-frame offset / 100u-ahead-of-own-frame
+  dumb + loft/lead 0x4beae4), Thruster 0x4be474 (quaternion-slerp BODY turn toward the aim at
+  turnRate°/s), MoveAndCollide 0x4bef78 (velocity aerodynamically aligned to thrust via
+  signed-square per-axis gains, ballistic droop as fuel burns, PROXIMITY FUSE on seeker
+  rangeToTarget, max-range + altitude-floor retire).
+
 ## Weapon fire is a PORT reconstruction (the dpl_* beam layer is unported)
 `Emitter::FireWeapon` builds a muzzle→target beam but the `dpl_*` beam renderable was never ported →
 the beam is drawn by `BTPushBeam`/`BTDrawBeams` (L4VIDEO — an additive quad / the real `ermlaser.bgf`
@@ -201,10 +266,11 @@ Real sample (`ava1`, 7 rows × 8 cells): rows 0-2 `rotateWithTorso=0` (feet/legs
 rows 3-6 `=1` (upper body — rotates with torso twist); a foot cell = `{0.5→16, 0.8→10, 1.0→5}`. The table
 is found by the mech's **type-0x14 DamageZoneStream NAME** (`ResourceDescription::resourceName`) →
 `ResourceFile::FindResourceDescription(name, DamageLookupTableStreamResourceType/*29*/)`.
-So STEP 6 remaining = (6b) fix the name-load (current `ResourceFindByName` is a NO-OP template stub → empty
-name → 0 rows); (6c) make the table functional + `ResolveHit→zone`; (6d) register the
-`Mech::TakeDamageMessageHandler` override + verify. **Nothing is guessed — geometry, roll, handler, and byte
-format are all verified.**
+So STEP 6 was = (6b) the name-load; (6c) the table + `ResolveHit→zone`; (6d) the
+`Mech::TakeDamageMessageHandler` override. **✅ ALL DONE — see "STEP 6 COMPLETE" below (`d07ac7d`):** the
+name-load BYPASSED the no-op `ResourceFindByName` via `SearchList(type=0x14)` (mech.cpp:1631), so the table
+loads live (`[cyl] table 'bhk1'/'madcat'/'ava1' layers=7`) and `ResolveHit` resolves unaimed hits to zones.
+**Nothing was guessed — geometry, roll, handler, and byte format all verified.**
 
 ## The classes ALREADY EXIST — `game/reconstructed/dmgtable.cpp` (2026-07 discovery)
 The three container classes are **already reconstructed** in `dmgtable.cpp`/`.hpp` (in the build):
diff --git a/context/decomp-reference.md b/context/decomp-reference.md
index 890bf31..0b701f7 100644
--- a/context/decomp-reference.md
+++ b/context/decomp-reference.md
@@ -58,13 +58,13 @@ reconciled via `CLASSMAP.md`, not the case label. [T1]
 | 0xBC3 | **Sensor** | — | `case`=MyomersClassID |
 | 0xBC4 | **Gyroscope** | @004b3778 | LIVE (task #56: byte-exact ctor/integrators/writers; hit-bounce fan-out wired) |
 | 0xBC5 | **Torso** | @004b6b0c | sizeof 0x280; `case`=SinkSource |
-| 0xBC6 | **Myomers** | @4b8fec | `case`=Actuator; INERT un-stub |
+| 0xBC6 | **Myomers** | @4b8fec | `case`=Actuator; un-stubbed (`8b36440`, full recon; per-tick Sim SetPerformance call-site still best-effort) |
 | 0xBC8 | **Emitter** | @004b1d18 | sizeof 0x478; energy weapon |
 | 0xBCB | **AmmoBin** | — | `case`=JumpJet; sizeof 0x22C |
 | 0xBCD | **ProjectileWeapon** | @4bc3fc | sizeof 0x448 (`case`≠ this — see VDATA.h) |
 | 0xBCE | **GaussRifle** | @4bdcb4 | : Emitter; FireWeapon is a **no-op** in this build |
 | 0xBD0 | **MissileLauncher** | @4bcff0 | sizeof 0x44C |
-| 0xBD3 | **SubsystemMessageManager** | @0049bca4 | damage/explosion consolidation hub (ConsolidateAndSendDamage, weaponExplosions); cached to `Mech[0x10d]`=**0x434** (recon MISLABELS it `controlsMapper`; the drive squats there — the real mapper is roster slot 0). NOT the valve/Myomers gate (that's the owning **BTPlayer** @mech+0x190). WAVE 8 = untangle + damage-hub. |
+| 0xBD3 | **SubsystemMessageManager** | @0049bca4 | damage/explosion consolidation hub (ConsolidateAndSendDamage, weaponExplosions); cached to `Mech[0x10d]`=**0x434** (✅ task #7 `afefaee`: factory builds the real class + `mech.hpp` names it `messageManager`; the `controlsMapper` mislabel is swept — the real mapper is roster slot 0). NOT the valve/Myomers gate (that's the owning **BTPlayer** @mech+0x190). |
 | 0xBD4 | **PPC** (: Emitter) | — | same FireWeapon as Emitter; `factory calls it GaussRifle` |
 | 0xBD6 | **HUD** | — | alloc 0x2a4; `case`=MechDisplay-ish |
 | 0xBD8 | **Searchlight** | — | `case`=LegSubsystem |
@@ -113,7 +113,7 @@ valid for reading the decomp, NOT for our compiled layout (see [[reconstruction-
 | +0x11c / +0x120 | `damageZoneCount` / `damageZones[]` | inherited Entity; Mech ctor populates the array |
 | +0x124 / +0x128 | `subsystemCount` / `subsystemArray[]` | the [[subsystem-roster]] (NOT the segment table) |
 | +0x190 | **owning `BTPlayer`** (`GetPlayerLink()`) | set by `FUN_0049f624` (mech↔player bind; also `player->playerVehicle(+0x1fc)=mech`). The valve guard (`FUN_004ac9c8 →player+0x274`) + Myomers gate (`FUN_004ad7d4 →player+0x260`) read the owning player's game-mode flags (NOT the messmgr @0x434). `MECH_OWNING_PLAYER`. |
-| +0x434 (word 0x10d) | `SubsystemMessageManager` cache | the 0xBD3 damage/explosion hub (factory @10142). Our recon MISLABELS this `controlsMapper` + the drive squats here; the real mapper is roster slot 0. |
+| +0x434 (word 0x10d) | `SubsystemMessageManager` cache | the 0xBD3 damage/explosion hub (factory @10142). ✅ task #7 (`afefaee`): `mech.hpp` names this `messageManager`; the `controlsMapper` mislabel is swept — the real mapper is roster slot 0. |
 | +0x260 / +0x26c | `localOrigin` = { Point3D linearPosition; Quaternion angularPosition } | ORIGIN.h:15; position@+0x100 in some subsystem views |
 | +0x300 | segment table | skeleton `EntitySegment`s (muzzle sites, joints) |
 | +0x37c | target world `Point3D` | aim source |
@@ -127,12 +127,41 @@ valid for reading the decomp, NOT for our compiled layout (see [[reconstruction-
 
 `mech+0x100` (a subsystem-view of localOrigin.linearPosition): `.x@+0x100, .z@+0x108`. [T1]
 
+### Binary ATTRIBUTE TABLES (2026-07-16, walked from the image) [T1]
+
+**Row format: 16-byte `{id, namePtr, memberOffset+1, 0}`** (MIND THE ALIGNMENT — an 8-off walk
+invents a fake one-slot shift; verified against the live-tested ConfigureActivePress row
+@0x50de54).  Walker: find the attr NAME string in DATA, find the pointer to it, decode ±16-byte
+rows until sanity fails (`python + struct`, see the session commits `cc2b109`/`21378ec`).
+
+- **Mech entity table @0x50c0xx, ids 21–56**: MaxAcceleration@0x344 (=forwardCycleRate),
+  CurrentSpeed@0x348 (=legCycleSpeed), MaxRunSpeed@0x34c (=run-cycle avg = the mapper's demand
+  multiplier), Collision{State,Normal,Speed,MaterialType}@0x450/0x4a8/0x4b4/0x4a4,
+  EyepointRotation@0x360 (the eye renderable's view rotation — the old `mechName@0x360` label is a
+  MISREAD), TargetReticle@0x36c, FootStep@0x394, AnimationState@0x39c, ReplicantAnimationState
+  @0x714, LinearSpeed/AngularSpeed/ClimbRate/AccelerationLastFrame@0x81c/0x824/0x828/0x82c (the
+  15-sample-ring velocity means + the accel snapshot), damage levels @0x354-0x35c, TestButton1-6
+  @0x328-0x33c, ReduceButton@0x340, Radar{Range,LinearPosition,AngularPosition}@0x404-0x40c,
+  **RearFiring@0x410** (OR of the weapons' rear flags; old `stateFlags` label was wrong),
+  RequestDuckAnimation@0x398, UnstablePercentage@0x3f0, SuperStop@0x3f4, DuckState@0x3f8,
+  IncomingLock@0x3fc, DistanceToMissile@0x400 (FLT_MAX far default; old `maxSpeed` label wrong).
+- **HeatSink table @0x50e438, ids 3–12**: HeatSink@0x164, CurrentTemperature@0x114,
+  Degradation/FailureTemperature@0x118/0x11c, Normalized/DegradationPressure@0x120/0x124,
+  CoolantCapacity@0x128, CoolantMass@0x12c, CoolantMassLeakRate@0x130, **ReportLeak@0x138**
+  (= coolantActive, the leak hysteresis flag).  Confirms every port heat binding.
+- **Torso table, ids 3–15**: RotationOfTorsoVertical/Horizontal@0x1e4/0x1d8, HorizontalLimit
+  R/L@0x1dc/0x1e0, SpeedOfTorsoVertical/Horizontal@0x1ec/0x1e8 (|rate|, abs'd),
+  StickPosition@0x1f0, TorsoUp/Down/Left/Right/Center@0x1f8-0x208, MotionState@0x20c
+  (statusFlags; ==2 = the limit-hit frame).
+- **MechWeapon rows**: RearFiring id 0x1B @0x334 = "the mount segment page name contains 'b'"
+  (marker @0x511aa2 — the back gun ports `sitelbgunport`/`siterbgunport`; ctor part_013.c:6913-30).
+
 ---
 
 ## 4. Damage delivery
 
 - `Entity::TakeDamageMessage(id, size, inflictingEntityID, zone, Damage&)` → `target->Dispatch(&msg)`.
-- Base `Entity::TakeDamageMessageHandler` **IGNORES zone==-1** — send a VALID zone index (the Mech cylinder-lookup override for unaimed hits is not reconstructed). [T1]
+- Base `Entity::TakeDamageMessageHandler` **IGNORES zone==-1** — the Mech STEP-6 cylinder-lookup override (✅ done, `d07ac7d`; `dmgtable.cpp` `ResolveHit` + `Mech::damageLookupTable`) resolves an unaimed (zone==-1) hit to a zone before base-routing. [T1/T2]
 - `class Damage { damageType(enum Collision/Ballistic/Explosive/Laser/Energy), damageAmount, damageForce, surfaceNormal, impactPoint, burstCount }`. [T1]
 - Weapon effect id: **"explode" = 13** (`Explosion::Make`). [T2]
 - `DestroyEntityMessage(id,size)` removes an entity — but a killed mech STAYS (a WRECK); death = a STATE transition (`SetGraphicState(DestroyedGraphicState)`), NOT removal. Issuing removal-on-death is the P5 teardown bug (do not). [T2]
diff --git a/context/locomotion.md b/context/locomotion.md
index b184b5f..3736377 100644
--- a/context/locomotion.md
+++ b/context/locomotion.md
@@ -6,7 +6,7 @@ source_sections: "PROGRESS_LOG.md §7, §10 (gait/ground/collision/shadow); docs
 related_topics: [asset-formats, decomp-reference, reconstruction-gotchas, combat-damage, rendering]
 key_terms: [RootTranslation, ground-model, SequenceController, MechControlsMapper, SLD, joint]
 open_questions:
-  - "Authentic per-mech turn-rate constant (currently bring-up constant; the authored WalkingTurnRate/RunningTurnRate now STREAM correctly since the task #4 record-layout fix -- rec words 0x18/0x19 deg->rad -> mech+0x574/0x578, Wword-absorbed -- wiring them in retires the bring-up rate)"
+  - "Turn-in-place FEEL re-verification (authentic release at standSpeed vs the earlier 0.25x stand-in -- subjective playtest, non-gating)"
   - "Airborne clip callbacks (FUN_004a7970) deferred"
 ---
 
@@ -114,6 +114,19 @@ through walk/run caps (`LoadLocomotionClips`, mech3.cpp:326 — measures `walkSt
 `legAnimation.SelectSequence`). Transition callbacks (`Mech::BodyClipFinished @0x4a6d8c`,
 `LegClipFinished @0x4a6928` — PE-parsed jump tables) alternate walk 6↔7 / run 12↔13 + walk→run. [T2]
 
+**Gait DEAD BAND (2026-07-16, byte-decoded) [T1]:** the SM has NO stable state for a demand in
+(`walkStrideLength`@0x534, `reverseSpeedMax`@0x538). Cap semantics (LoadLocomotionClips @0x4a80d4):
+0x534 = walk-cycle avg root speed (clips 6+7); **0x538 = the LAST KEYFRAME SPEED of clip slot 10 =
+the walk→run transition clip's exit speed — the run ENGAGE threshold, not a "reverse max"**; 0x34c
+= run-cycle avg root speed (clips 12+13) — and 0x34c is the mapper's demand multiplier
+(`FUN_004afd10`: `speedDemand = mech->0x34c × throttle × 0x5c0`, continuous). Walk cyc clamps to
+[standSpeed, 0x534]; run cyc clamps to [0x538, 0x7a0]. The finished-callback up-shifts when
+`tgt > 0x534` but enters/sustains run only when `tgt ≥ 0x538` (x87 decode of 0x4a6f11/0x4a6fc7/
+0x4a7041) → a demand parked between them cycles 7→10→14→7 forever ("gallop hunt"), firing the
+authored EngineShiftFwd/Rev audio each swing (Blackhawk: 22.02–30.87 = throttle 36–50%). Faithful
+mechanics — likely masked on real hardware by MECHANICAL lever detents ([[pod-hardware]] [T4]).
+Port: keyboard lever snaps out of the band at rest (mech4.cpp "GAIT DETENT" accommodation).
+
 ## Turn-in-place (trn, state 4) — AUTHENTIC dispatcher decoded (task #64, 2026-07-14)
 **The entry dispatcher is NOT in the Ghidra decomp** — it lives in the master-perf gap
 `0x4a9b5c–0x4ab188` (functions_index.tsv jumps FUN_004a9770→FUN_004ab188; the SOLE reader of
diff --git a/context/multiplayer.md b/context/multiplayer.md
index 2e3561f..70fa49b 100644
--- a/context/multiplayer.md
+++ b/context/multiplayer.md
@@ -6,7 +6,7 @@ source_sections: "PROGRESS_LOG.md §7 (Phase 7), §8 (P6); docs/HARD_PROBLEMS.md
 related_topics: [wintesla-port, combat-damage, locomotion, decomp-reference]
 key_terms: [master, replicant, EGG, dead-reckon]
 open_questions:
-  - "pod-LAN config (real IPs); update-record velocity from the body-channel projection; peer SimulationState/DropZoneLocation replication (authentic peer warp spheres); authentic per-mech turn rates now streamed (task #4) but not yet wired into the turn code"
+  - "pod-LAN config (real IPs); peer warp DropZoneLocation-anchoring [T3] (world-anchored peer sphere already visible, 160b78e); console-death replication freeze (pending recurrence to diagnose)"
 ---
 
 # Multiplayer
@@ -262,8 +262,18 @@ Base fns in every subsystem vtable: slot 6 = 41bd34 (Read/apply), slot 7 = 41c50
   invisible). First real twist record overwrites it.
 
 ## Remaining (P6 phase 4 / Phase 7)
-The pod-LAN config (real IPs, bare-IP pilot entries); update-record velocity sourced from the body-channel
-projection (above). See [[open-questions]]. [T3]
+Pod-LAN config: **real-IP path VALIDATED (2026-07-15)** — an egg with the machine's real LAN IP in
+`[pilots]` (not `127.0.0.1`) connected + replicated + moved end-to-end (`Connected to
+GameMachineHost at 10.0.0.46:1602`, `All connections completed!`, peer telemetry flowing). So
+`gethostbyname` local-address matching (L4NET.CPP:2612, which also appends 127.0.0.1) + the
+`WSAStringToAddressA` `IP:PORT` parse (ResolveAddress) both work with real addresses — NOT
+localhost-locked. Recipe: egg `[pilots]` = each machine's LAN IP + its GAME port (`= -net port + 1`,
+e.g. `10.0.0.46:1502`); each machine runs `btl4 -egg lan.egg -net <consolePort>`; console relay
+(`btconsole.py lan.egg A_IP:1501 B_IP:1601`) from any machine; open the TCP console+game ports in
+the Windows firewall. STILL UNTESTED: an ACTUAL two-physical-machine run (validated single-box via
+the real LAN IP), so firewall is the main first-attempt unknown. Affinity pinning is NOT needed
+across separate machines (the packet-jitter artifact is single-box only). Also: update-record
+velocity sourced from the body-channel projection (above). See [[open-questions]]. [T2 path / T3 two-box]
 
 ## MP-front scout (task #45, 2026-07-09) — the P6 chain SURVIVES the combat/HUD rework [T2]
 Re-ran the one-box smoke test on the current build (world-pick targeting, weapon groups, death
@@ -342,15 +352,21 @@ transition, HUD all landed since P6): console egg → mesh → RunningMission on
      defect that hid it for the whole effort was NOT the warp code — it was a general
      **texture-scroll precision-collapse bug** in `L4D3D::SetTextureScrolling` (offset = `scrollDelta ×
      absolute_time` → unbounded → UV precision loss → radial "spokes"), fixed with `fmodf`; that also
-     cleans the scrolling beam grit. See [[reconstruction-gotchas]] §13. REMAINING: the AUTHENTIC peer
-     path (see OTHERS' spheres) still needs player SimulationState/DropZoneLocation replication — until
-     then the local-player sphere stands in; and confirm the COLLAPSE (death-side) warp fires on every
-     MP death path (the force-damage test logged EXPAND reliably, COLLAPSE less so).
+     cleans the scrolling beam grit. See [[reconstruction-gotchas]] §13. PEER WARP IS WIRED + VISIBLE
+     (`160b78e`): an observer sees a peer's un-wreck warp via the world-anchored `BTStartWarpEffect`
+     (mechdmg.cpp:1074, `ReplicantInstance`-gated; `simulationState` rides every record header).
+     REMAINING [T3, non-gating]: the peer sphere is anchored to the peer's WORLD position, not the
+     peer's authentic `DropZoneLocation` (that attribute isn't replicated) — a fidelity refinement.
+     Also confirm the COLLAPSE (death-side) warp fires on every MP death path (force-damage test logged
+     EXPAND reliably, COLLAPSE less so).
    NOTE the respawn-cycle SIM path is separate + done: `DropZoneReply` (FUN_004bffd0) → `Mech::Reset`
    (@0049fb74) + the level-2 "translocated" cockpit alarm; `CreatePlayerVehicle` (FUN_004bfcac,
    disassembled — make+link only, matches RP analog). The sphere is a pure RENDER-side watcher on the
    SimulationState dial, independent of that sim path.
-   Mech::Reset (@0049fb74) full subsystem-reset sweep is still a bring-up TODO.
+   Mech::Reset (@0049fb74) does the full subsystem-reset sweep (mech4.cpp:1616 loops every subsystem →
+   `DeathReset(mode)`, restoring heat/power/ammo/charge) + heals all damage zones + ForceUpdate(0x1f).
+   (Per-subsystem `DeathReset` bodies are authentically trivial/empty for some classes — the shipped
+   build folds those overrides — so "fuller" reset behavior is per-subsystem, not a missing sweep.)
    **Three respawn bugs found + fixed on the way (all [T2], 2-node force-damage verified):**
    (i) **death-latch un-latch** — `IsMechDestroyed` tested `graphicAlarm>=9` alone; a later leg hit
    on the wreck rewrites the alarm to 4/3, un-latching → the death transition RE-RAN (double kill,
@@ -393,3 +409,19 @@ transition, HUD all landed since P6): console egg → mesh → RunningMission on
 ## Key Relationships
 - Base: [[wintesla-port]] (L4NET). Depends on: [[locomotion]] (update writer), [[combat-damage]]
   (entity lifecycle). Detail: `docs/HARD_PROBLEMS.md` (P6).
+
+
+## Authentic coupled peer motion — DONE (task #50, 2026-07-14) [T1]
+Decomp-verified (workflows w0odszxro/wh1h5gnmc, 3 make-or-break claims adversarially CONFIRMED; committed c52a1ad + default-promoted). The 1995 peer per-frame path FUN_004ab430 -> FUN_004ab1c8 (IntegrateMotion) drives motion SINGLE-SOURCE:
+- LINEAR position = GAIT. IntegrateMotion advances the BODY gait channel FUN_004a5678 (FUN_004a5028 is DEAD CODE, zero call sites), turns its cycleDistance into velocity `{0,0,-cd/dt}`, rotates by heading, integrates into projectedOrigin.linear@0x260 (part_012.c:14994/14997/15008); localOrigin.linear@0x100 is copied VERBATIM from it (FUN_00408440, part_012.c:15131 -- NOT a lerp). updateVelocity.linear is never used for position.
+- ANGULAR/heading = replicated-velocity slerp (the ONLY thing Mover::DeadReckon-style velocity extrapolation drives): projectedOrigin.angular@0x26c built from updateVelocity.angular@0x2d4 (FUN_004ab188), localOrigin.angular slerped toward it.
+- 0x260 aliasing: "motionDelta@0x260" and "projectedOrigin@0x260" are LITERALLY THE SAME field (base Mover::projectedOrigin, Origin 0x1c); "worldPose@0x26c" is its quaternion half. Our reconstruction's shadow names hid this and drove the false velocity-vs-gait "contradiction".
+- Re-anchor: motionEventVector@0x598 = updateOrigin - localOrigin captured on poseSyncLatch, DECAYED into localOrigin over ~_DAT_004ab9cc (~0.2s) -- no snap. Zeroed in idle states.
+- MASTER + PEER run the SAME predictor. The master's SEND-mirror (FUN_004a9b5c @0x4aab9c) advances projectedOrigin by IntegrateMotion(mj=0) fed the LAST-SENT bodyTargetSpeed, then deadbands |localOrigin-projectedOrigin|^2 vs UpdatePositionDiffrence@0x768. A gait-driven peer REQUIRES this gait mirror (a constant-velocity mirror under-sends -> tug-of-war, measured ratio 1.86).
+- T4 CLOSED: both leg(0x65c) and body(0x6bc) animators are AnimationInstances of the SAME JointedMover/JointSubsystem (JMOVER.cpp:1382) -- either poses the WHOLE skeleton. Our port keeps the peer on the LEG channel (body unbound on the peer); faithful functional equivalent.
+
+RECONSTRUCTION STATE: coupled path is DEFAULT ON (mech4.cpp: s_drPos gait-coupled, s_gaitMirror/Send). Reverts: BT_DR_POS=1 (peer velocity), BT_NO_MASTER_GAITMIRROR (master const-vel mirror). Measured: single-source coupling backward-steps 0.1% (vs the two-source split's churn), position ratio 1.043. RESIDUAL (follow-up): MEASURED SMALL / effectively resolved (2026-07-15). With the peer now on the BODY channel (`96a896a`, matching the master's body-channel mirror) + affinity pinning, an accel/decel soak (node B `BT_AUTODRIVE`+`BT_DRIVE_SWEEP0` through STOP, node A `BT_SNAPLOG`) measures peer drift maxing at **~0.64u** (median 0.54u, 18 events >0.5u over 48s), gently absorbed at k~0.24/frame -- SUB-UNIT, not the earlier ~2.9u (which predated the body-channel swap AND was measured without CPU-affinity, i.e. with packet-jitter-sparse records). At the noise floor; no fix warranted. The old "run the master mirror on a leg-channel prediction" plan is moot now the peer is on the body channel. Still open (cosmetic): exact `_DAT_004ab9cc` decay constant; whether IntegrateMotion's 2-stage angular integrate is intended.
+
+
+## Peer motion: the "random shakiness" is single-box packet jitter, NOT the game (task #50, 2026-07-15) [T2]
+After the coupled body-channel peer landed (96a896a + turn-step f094d78 + cadence-mirror 23f1532), residual peer shakiness on accel/decel was RANDOM -- sometimes perfect, sometimes shaky. Root cause is the TEST RIG, proven with BT_RXJIT (record inter-arrival ms on the peer): two Debug btl4 nodes on ONE box contend for CPU, so Windows BATCHES their TCP delivery -- update records arrive in bursts (min ~0ms back-to-back, max 56-226ms gaps, burstiness max/avg 3-7x) instead of an even ~17ms. A peer dead-reckons across the long gaps then snaps when a record lands -> random shake. Pinning each node to a DISJOINT core set (ProcessorAffinity 0x00F / 0x3C0) restored even ~17ms delivery (burstiness ~1.0) and the shakiness vanished (user-confirmed). REAL pods are dedicated machines with no contention -- they never see this. DO NOT add an interpolation/jitter buffer or other un-authentic netcode to mask a single-box artifact. Use tools/mp_launch.sh (bakes in the affinity) for all 2-node tests. Diagnostic env: BT_RXJIT (arrival jitter), BT_SLIDE ([slide]/[mslide] slide-in-stand), BT_GAITEV, BT_MIRDIV, BT_NO_MIRROR_CAD / BT_PEER_LEGCH (revert the coupled-peer fixes).
\ No newline at end of file
diff --git a/context/open-questions.md b/context/open-questions.md
index 9223999..7d8ee17 100644
--- a/context/open-questions.md
+++ b/context/open-questions.md
@@ -20,6 +20,14 @@ authentic path scoped.
   `BTL4.RES` already has 8 maps + the full mech anim set.) Status: OPEN.
 - Pod specifics for Phase 8: the 7-monitor driver setup, the RIO cockpit I/O protocol, current
   Win10+wrapper pod config. Status: OPEN.
+- **Did the pod throttle quadrant have MECHANICAL detents** (how many / lever positions)? The
+  software path is notch-free [T1, [[pod-hardware]]], but the gait SM's walk/run dead band
+  ([[locomotion]]) only makes sense if the hardware discouraged parking the lever mid-band —
+  "5 speeds" pod lore suggests physical notches. Status: OPEN.
+- ~~Which mechs used rear fire~~ **ANSWERED from data (2026-07-16, task #68)**: the Blackhawk's
+  ERMLaser_2/3 (back gun ports) are the only rear weapons in the roster; see [[combat-damage]].
+  Remaining: bind the side/down look views to keys (only 'V' look-back is bound); pod look-button
+  mappings for Phase 8.
 
 ## BINARY-COVERAGE AUDIT discoveries (2026-07-13, 6-agent decomp census) [T1 verified-uncited]
 New unaccounted functionality no prior list knew (addresses verified absent from game/+context/+docs):
@@ -154,6 +162,17 @@ register.  ⚠ The audit also flags the damage-economy item as SELF-CONTRADICTOR
   centred); (c) pre-burial, the pick still
   tests the sinking wreck's collision box at its parked position (pre-existing wreck-targeting
   behavior).
+- **✅ WORLD STRUCTURES (garages/walls) now targetable (task #50, 2026-07-15)** — the world-pick's
+  non-mech tier previously only sampled the visual heightfield (`BTGroundRayHit`), which on arena1
+  is a single flat `'sky'` ground mesh → shots passed THROUGH the garages and only mechs moved the
+  range axis (user-reported regression). Resolved by ray-testing the **zone's static collision
+  solid tree** (the geometry that already blocks the walk) via the authentic engine query
+  `Mover::FindBoxedSolidHitBy`'s static-world tail — factored into `Mover::FindStaticSolidHitBy` +
+  `Mech::WorldStructurePick`. See [[combat-damage]] "WORLD STRUCTURES ARE TARGETABLE". This also
+  closes the old "0x388 writer is un-exported / unknown world-pick mechanism" residue: the
+  authentic non-mech world pick is the static-solid-tree ray query (`BoxedSolidTree::FindBoundingBoxHitBy`),
+  the same one `FindBoxedSolidHitBy` uses for mover-vs-world collision. Interactive aim is
+  user-verified (headless has no `BTGetAimRay`); the `BT_WSWEEP` ray-fan is the headless proof.
 - **Cockpit HUD leftovers (tasks #35-#38 residue, 2026-07-08)** — the reticle + 7 weapon pips +
   ALL the instrument dynamics are LIVE (the Execute @004cdcf0 gap was RECOVERED via capstone
   disasm, task #37; the authentic Lock producer + the simple-X mode landed in #38 — see
@@ -201,8 +220,9 @@ register.  ⚠ The audit also flags the damage-economy item as SELF-CONTRADICTOR
   Also: `deathAnimationLatched`/`legResetLatch` were never ctor-initialised (0xCDCDCDCD gate bug,
   fixed in mech.cpp ctor). See [[cockpit-view]].
 - **MechControlsMapper look/eyepoint commit** — reconstructed but its offsets collide with declared
-  members; arbitrate before enabling (no port consumer yet). The fire-trigger-through-mapper is
-  still the `gBTWeaponTrigger` bring-up.
+  members; arbitrate before enabling (no port consumer yet). (The fire-trigger-through-mapper is NO
+  LONGER the bring-up: the `gBT*Trigger` globals are retired / never-read — the authentic LBE4
+  buttonGroup path replaced them, task #5 `8ed6184`.)
 - **✅ Weapon groups — the AUTHENTIC defaults + fire path LIVE (task #5, 2026-07-11) [T1/T2].**
   The system decoded end-to-end: a fire "channel" = a physical `buttonGroup` slot in the global
   `LBE4ControlsManager` (fire buttons 0x40 Trigger / 0x45 Pinky / 0x46 ThumbLow / 0x47 ThumbHigh);
@@ -355,8 +375,12 @@ register.  ⚠ The audit also flags the damage-economy item as SELF-CONTRADICTOR
   three coolant epsilon corrections (0.0025/0.003/1e-4 for the old single 1e-4) +
   CoolantCapacityScale = 0.05 float80 (both prior readings wrong).  Verified: heat flows,
   exits (~2/3 of a 1e10 spam run drained), weapons overheat under max-rate autofire exactly
-  as the authored-constant simulation predicts (thermal spam is unsustainable BY DESIGN;
-  heatLoad -> effectiveRange 0 = the authentic overheat cutout).
+  as the authored-constant simulation predicts (thermal spam is unsustainable BY DESIGN; the
+  authentic overheat cutout is the FailureHeat CHARGE-HOLD -- `ResetFiringState` + currentLevel=0
+  until it cools, @004baa88 -- NOT a range collapse. ⚠ CORRECTION (`aab7a8a`, task #50):
+  effectiveRange = (1 - HOST-ZONE damage) x weaponRange reads `Subsystem::damageZone->damageLevel`
+  (weapon+0xE0), NOT heatLoad; the old "heatLoad -> effectiveRange 0" mechanism here was the same
+  @0xE0-DamageZone-vs-heat misattribution fixed in heat.cpp:803).
 - **Task #10 -- the "scrambled routing" RESOLVED (2026-07-11) [T2].** The routing was NEVER
   scrambled: a `[heat-link]` attach log proved every subsystem links its authored sink
   exactly (bhk1: PPC_1->C4, PPC_2->C6, ERM_1/2/3->C1/C6/C4, SRM6s->C2, generators->C1/C2/C3/C5,
@@ -413,32 +437,32 @@ register.  ⚠ The audit also flags the damage-economy item as SELF-CONTRADICTOR
   under reconstruction: config-mode regrouping (task #6), generator reassignment (ids 4-8),
   coolant valves.
 
-- **AUTOCANNON JAM / coolant-priority — mechanism FAITHFUL + COMPLETE; a CALIBRATION question
-  pending QA ground-truth (2026-07-14) [T1 mechanism / T3 pacing].** An original QA dev reports:
-  "all AFCs jam on their 3rd shot if coolant priority isn't boosted; boosted → almost never jam."
-  Full decomp hunt (2 agents) confirms the whole chain is reconstructed end-to-end and the port is
-  FAITHFUL — **do NOT "fix" it by driving a weapon's `coolantFlowScale` from the valve; that field
-  being a constant 1.0 for weapons is AUTHENTIC** (the ONLY writer of any HeatSink `+0x15C` from a
-  valve value is `RecomputeCondenserValves`/FUN_0049f788, which iterates ONLY the condenser chain
-  `mech+0x7cc`). Authentic mechanism: a weapon dumps `heatCostToFire` (AFC100=6.5e7 raw) into its
-  OWN linked condenser; the condenser sheds to the shared bank at a rate scaled by its valve SHARE
-  (`coolantFlowScale = valveState_i / Σ valveState`, MoveValve msg id 4, detents 1/5/50/0). Boosting
-  ONE condenser's valve (share ~0.17→~0.9 = ~5× conductance) drops its equilibrium temp so the
-  weapon dumping into it stays below `degradationTemperature`(1000) → `heatAlarm`=0 → CheckForJam
-  early-returns → no jam. Starved → condenser saturates → weapon crosses 1000 → the STICKY
-  probabilistic jam (`p=clamp(0.41·T/failT,0.05,1)`, JammedState 5, clears only on ResetToInitialState)
-  latches. Two distinct "jam" states: **degradation 1000 → probabilistic sticky jam** (the pilot's
-  "jam"); **failure 2000 → deterministic self-clearing overheat lockout** (recoil-pinned + weaponAlarm 7,
-  re-fires each frame until it cools). ALL thermal constants load strictly from the resource (no
-  stand-in fallback — a missing value ERRORS). **Empirical (BT_JAM_LOG/BT_VALVE, madcat AFC100):**
-  uncooled the weapon crosses 1000 at ~shot 4 and PLATEAUS ~1400 (conduction balances input), giving
-  ~25% probabilistic jam — directionally right but NOT the QA's deterministic "3rd shot". Gap is
-  calibration (condenser thermalMass/conductance live in LAST.EGG, unread) + scenario (fire rate;
-  which condenser boosted — a uniform BT_VALVE is normalized away, need a targeted per-condenser
-  boost). NEXT: get QA to clarify (a) deterministic lockout vs probabilistic jam, (b) per-weapon vs
-  global coolant boost + which control; THEN verify calibration — do NOT tune the heat economy to
-  force "3rd shot" without ground-truth (would be un-faithful). Diag probes committed: `BT_JAM_LOG`
-  (projweap.cpp), `BT_VALVE` (heatfamily_reslice.cpp). See [[combat-damage]], [[subsystems]] heat.
+- **✅ AUTOCANNON JAM / coolant-priority — FAITHFUL + CONFIRMED against QA ground-truth, SOLVED
+  purely from the decomp (2026-07-14) [T1/T2].** An original QA dev reported: "all AFCs jam on their
+  3rd shot if coolant priority isn't boosted; boosted → almost never jam." VERDICT: the whole chain
+  is reconstructed end-to-end, FAITHFUL, and reproduces the reported behavior — no bug, no stand-in.
+  **DO NOT "fix" it by driving a weapon's `coolantFlowScale` from the valve; that field being a
+  constant 1.0 for weapons is AUTHENTIC** (the ONLY writer of any HeatSink `+0x15C` from a valve value
+  is `RecomputeCondenserValves`/FUN_0049f788, which iterates ONLY the condenser chain `mech+0x7cc`).
+  Mechanism: a weapon dumps `heatCostToFire` (AFC100=6.5e7 raw) into its OWN linked condenser (AFC100→
+  Condenser4); the condenser sheds to the shared bank at a rate scaled by its valve SHARE
+  (`coolantFlowScale = valveState_i / Σ valveState`, MoveValve msg id 4, detents 1/5/50/0). The
+  weapon's OWN thermal conductance (35500) caps how fast it sheds into its condenser, so coolant
+  priority shifts the weapon's equilibrium only ~100 K — but that is EXACTLY enough to straddle the
+  `degradationTemperature`(1000) jam line at combat fire rates. Cross `1000` → `heatAlarm`≥1 → the
+  jam roll arms (`p=clamp(0.41·T/failT, 0.05, 1)`); on a hit → sticky `JammedState`(5), clears only on
+  ResetToInitialState. (Distinct: `failureTemperature`(2000) → self-clearing overheat lockout,
+  recoil-pinned + weaponAlarm 7.) **ALL constants VERIFIED AUTHENTIC vs the raw BTL4.RES bytes**
+  (`scratchpad/afc_dump.py`): AFC100 startT=77, degradT=1000, failT=2000, thermalConductance=35500,
+  thermalMass=94700, heatCostToFire(+0x1A4)=6.5e7, recharge(+0x190)=8, damage=25, minJamChance=0.05 —
+  no mis-scaling. **THE ANSWER IS FIRE-RATE-DEPENDENT** (measured, BT_JAM_LOG/BT_VALVE_BOOST/BT_AF_PERIOD,
+  madcat AFC100 → Condenser4): at MAX spam (8s recharge) the AFC overheats regardless (~1460 boosted
+  ~1360 — both jam); at a SLOW cadence (16s) it plateaus ~770 and never jams; at the ~11s COMBAT cadence
+  it is DECISIVE — **not boosted → 1058 K (jams), boosted (Condenser4 valve→50, others→1) → 953 K (never
+  jams)**. So the QA is right and the reconstruction is faithful; the earlier "boost is weak" read was
+  an artifact of testing at max spam (above the window). Diag probes committed: `BT_JAM_LOG`
+  (projweap.cpp), `BT_VALVE`/`BT_VALVE_BOOST=<condenserNum>` (heatfamily_reslice.cpp), `BT_AF_PERIOD=<sec>`
+  (mech4.cpp). See [[combat-damage]], [[subsystems]] heat.
 
 - **Subsystem-panel online/offline gate — fields unidentified [T4] (2026-07-12).** The binary's
   SubsystemCluster draw-state reads `*(subsystem+0x40)==1` and `*(subsystem+0x278)!=4`; neither
@@ -536,11 +560,30 @@ register.  ⚠ The audit also flags the damage-economy item as SELF-CONTRADICTOR
   ctor per mech, zone destroyed → crits damaged/DESTROYED with authentic accumulation.
   Residue: roster idx 0/1 (mapper installed post-ctor / voltage-bus stub) stay unbound with a
   logged skip — none of the 8 mechs' streams crit-list them in practice.
-- **Two dead Wword comparison branches (multiplayer)**: `mech.cpp:1511` + `:1613` (replicant
-  leg-state/stability sync in ReadUpdateRecord) — always-false BTVal comparisons ([[reconstruction-gotchas]] §2);
-  needs slots 0xf/0x10 promoted to named members when P6 replication work resumes.
+- **✅ Two dead Wword comparison branches — DONE (task #1, `c9f0c2a`).** `Mech::ReadUpdateRecord`
+  case 3 now reads real named fields off `Mech__StateUpdateRecord` (legState / stability / legResetLatch /
+  speedDemand); the always-false Wword/BTVal branches are gone (the old `mech.cpp:1511`/`:1613` line
+  numbers no longer point at that code).
 
 ## Multiplayer (Phase 7 / P6)
+- **✅ Console-death peer-replication freeze — NOT REPRODUCIBLE + the one real bug FIXED
+  (2026-07-15) [T2].** The 2026-07-14 report (btconsole.py died mid-match → peer↔peer replication
+  froze both ways) did NOT reproduce in the current build under EITHER failure mode, tested directly
+  (BT_REPL_LOG on a circling peer, affinity-pinned): (1) a clean relay kill — the replicant kept
+  circling smoothly through the kill, NO disconnect logged, node survived; (2) a deliberately STUCK
+  console (`scratchpad/btconsole_stuck.py` — connects, starts the mission, then stops recv()'ing while
+  holding the socket OPEN = the exact "receive pad full → close never seen" mode hypothesized) — the
+  replicant kept moving the entire run. So **peer replication is INDEPENDENT of the console**: the
+  pods replicate peer-to-peer over the GAME socket; the console is a separate egg/mission/status
+  channel. The original freeze was a transient (plausibly the same single-box packet-jitter /
+  CPU-contention artifact root-caused 2026-07-15, `49d73dc`) or was fixed by later MP work.
+  **The flagged latent bug IS real and is now FIXED:** `HostDisconnectedMessageHandler`'s
+  ConsoleHostType branch closed **`gameListenerSocket`** (the GAME listener) on a CONSOLE disconnect —
+  a naming bug; the comment + the commented-out `OpenConnection` intended a CONSOLE re-listen, which
+  `CreateConsoleHost()` already does. Removed (L4NET.CPP:969). Harmless to established peer sockets
+  (why a live match keeps replicating through console loss), but it would have blocked a NEW peer
+  from joining after a console cycle. Verified: 2-node still connects (`All connections completed!`)
+  + the peer circles. Diag harness retained: `scratchpad/btconsole_stuck.py`.
 - ✅ Cross-pod COMBAT — DONE (tasks #46/#47: replicant targeting + damage rerouted to the owning
   master, full cross-pod kill verified). ✅ Replicant GAIT animation — DONE (task #50: replicant
   derives speedDemand from the replicated velocity, full stand→walk→run lifecycle verified).
@@ -597,3 +640,31 @@ register.  ⚠ The audit also flags the damage-economy item as SELF-CONTRADICTOR
 ## Key Relationships
 - Feeds from: every subsystem/render topic (their deferral notes collect here).
 - Gating master: [[source-completeness]] (the missing BT source).
+
+## Peer coupled-motion architecture — ✅ DONE (task #50, 2026-07-14/15) [T1/T2]
+RESOLVED. (This block was the old COMPLETION PLAN from `ea39af1`; it was left stale after
+the work actually landed — reconciled 2026-07-15.) The coupled single-source gait pipeline
+is reconstructed, DEFAULT ON, and the residual was root-caused. See [[multiplayer]] two
+sections: **"Authentic coupled peer motion — DONE"** (linear position = BODY gait channel
+integrated into `projectedOrigin@0x260`; angular = replicated-velocity slerp; master
+SEND-mirror runs the SAME `IntegrateMotion` predictor fed the last-sent `bodyTargetSpeed`)
+and **"Peer motion: the 'random shakiness' is single-box packet jitter, NOT the game"**.
+- Landed: coupled path promoted to default (`c52a1ad` + `b013742`); peer poses from the
+  BODY channel (`96a896a`); turn-step on the body channel (`f094d78`); true-mirror cadence
+  driving the clip from actual replicated motion (`23f1532`). Groundwork: exact quaternion
+  integration (`a8eb8a4`), incremental peer heading (`d78e77b`), clock guard (`93456be`),
+  commanded-speed cadence feed (`6374efc`), Abs-macro fix (`7615ecd`).
+- **The old "needs the MASTER HALF" conclusion was SUPERSEDED:** the leftover accel/decel
+  shakiness was ROOT-CAUSED as single-box **packet jitter** (`49d73dc`) — two Debug nodes on
+  one box batch TCP delivery, so records arrive bursty (BT_RXJIT burstiness 3-7x) and the peer
+  dead-reckons across the gaps then snaps. Pinning each node to a disjoint core set
+  (`ProcessorAffinity 0x00F/0x3C0`, baked into `tools/mp_launch.sh`) restored even ~17ms
+  delivery and the shakiness vanished (user-confirmed). Real pods are dedicated machines and
+  never see it. **DO NOT add an interpolation/jitter buffer** to mask a rig artifact.
+- Minor non-gating follow-ups (tracked in [[multiplayer]]): the peer accel/decel drift
+  (flagged ~2.9u, but **MEASURED ~0.64u max** on the affinity rig with the peer on the body
+  channel -- `BT_SNAPLOG` + `BT_DRIVE_SWEEP0`, 2026-07-15; sub-unit, effectively resolved,
+  no fix warranted); the exact `_DAT_004ab9cc` offset-decay constant; whether
+  `IntegrateMotion`'s 2-stage angular integrate is intended.
+- Speed model decomp-settled (`2c6db6a`): analog throttle, '5 speeds' false, `throttleState@0x4a4`
+  is actually the fall-surface material (RENAME PENDING).
diff --git a/context/pod-hardware.md b/context/pod-hardware.md
index b0125b4..59fe3fc 100644
--- a/context/pod-hardware.md
+++ b/context/pod-hardware.md
@@ -25,6 +25,49 @@ to keyboard/gamepad on a dev box; real wiring is a pod bring-up task (Phase 8).
 model — `LBE4ControlsManager` groups are fed by all devices (RIO on the pod, DirectInput on dev);
 the `MechControlsMapper` interprets them ([[locomotion]]). [T2]
 
+### The pod throttle is ANALOG-CONTINUOUS, not notched (verified end-to-end) [T1]
+The authentic pod throttle path — traced 2026-07 (task #50 throttle-fidelity question):
+1. **Hardware → RIO:** serial `AnalogReply` packet → `Ranger("Throttle", 0, 800, .05)` — raw counts
+   0–800, 5% deadband, auto-ranging offset, output a CONTINUOUS Scalar; the sign is inverted
+   ("Throttle counts BACKWARDS", `engine/MUNGA_L4/L4RIO.cpp:1374-1377`, Ranger @L4RIO.cpp:461-701).
+   No quantization/notching anywhere in `Ranger::Update`.
+2. **Manager:** `LBE4ControlsManager::Execute` → `scalarGroup[ScalarThrottle].Update(&rioPointer->
+   Throttle, mode_mask)` on every AnalogReply (`L4CTRL.cpp:1379-1382`). ScalarThrottle = index 0 →
+   manager+0x24 (scalarGroup base 0x24, 0x20/entry; buttonGroup base 0x1c0, keyboardGroup 0x160).
+3. **Streamed `.CTL` mapping (the "handled elsewhere"):** `MechRIOMapper`'s ctor @004d266c binds NO
+   throttle — the bind comes from the type-19 `ControlMappingStream` resource named **"L4"** (child
+   of the per-mech type-6 `ControlMappingsList`; installed by `BTL4APP MakeViewpointEntity` via
+   `CreateStreamedMappings` @0047703c). BTL4.RES "L4" record [1]:
+   `Scalar Throttle → subsystemID 0 (ControlsMapper slot), DirectMapping, attr 4, mask 0xffffffff`.
+   Attr 4 = "ThrottlePosition" @ mapper+0x11c (binary IndexEntry table @0050efd8: id 4 → offset
+   0x11d-1 = 0x11c, name "ThrottlePosition" @0050f28f). Reverse = record [2]: `Button Throttle1
+   (0x3F, on the throttle handle) → attr 6 ReverseThrust@0x124`. Turn = pedals value-bound in the
+   ctor (manager+0x44/+0x64 → mapper+0x1b4/+0x1b8).
+4. **Interpretation:** `L4MechControlsMapper::InterpretControls` @004d196c applies the ONLY software
+   detent — snap to 1.0 when |t−1.0| ≤ 0.05 — then `MechControlsMapper::InterpretControls` @004afd10
+   computes `speedDemand@0x128 = maxSpeed(mech+0x34c) × throttlePosition(0x11c) × scale(mech+0x5c0)`
+   (forward) or `−maxSpeed × throttlePosition` (reverse flag 0x124).
+
+**Consequence:** the original pod produced a continuously varying speedDemand while the lever moved
+(updated per serial AnalogReply, NOT per render frame). There are NO "5 throttle notches" anywhere
+in the software path. (Keyboard keys '1'-'5' in @004d1bf0 set controls-manager MODE masks; the
+'+'/'-' pair steps a [0,5] value that drives `pow(2,x)` into mech+0x404 = HUD zoom 1×–32× — neither
+is a speed setting.) The mech's `throttleState@0x4a4` writer remains un-exported (likely in the
+0x4a9b5a–0x4ab188 gap) — [[open-questions]].
+
+**MECHANICAL-notch hypothesis (2026-07-16) [T4, hardware]:** the "5 speeds" pod lore may still be
+true — as detents in the throttle QUADRANT hardware, invisible to the software (the pot reads
+continuous counts regardless of where the lever mechanically rests). Independent corroboration
+from the gait math ([[locomotion]]): the gait SM has NO stable state for a demand between the walk
+cap (`walkStrideLength`@0x534) and the run engage speed (`reverseSpeedMax`@0x538, the walk→run
+transition clip's exit speed) — a demand PARKED in that band hunts walk→shift-up→shift-down
+forever, firing the authored EngineShiftFwd/Rev sounds each swing (binary-verified, all-authentic
+data: Blackhawk band = demand 22.02–30.87 = throttle 36–50%). A design like that only ships if the
+hardware discourages parking in the band. Port accommodation: the keyboard lever snaps out of the
+dead band AT REST (`mech4.cpp` "GAIT DETENT"; sweeping through while held stays continuous =
+authentic moving lever). Ask Nick: did the pod throttle quadrant have mechanical detents
+(how many / positions)? — [[open-questions]].
+
 ## Multi-surface gauge path (intact, pod-only by default)
 The pod multi-surface path EXISTS and is intact: `DPLRenderer::FindBestAdapterIndices` (multi-
 adapter selector, honors PRIMGAUGE/SECGAUGE/MFDGAUGE/SPANDISABLE), `SVGA16::BuildWindows` (a
diff --git a/context/project-overview.md b/context/project-overview.md
index 0c87aa1..f3991eb 100644
--- a/context/project-overview.md
+++ b/context/project-overview.md
@@ -42,7 +42,11 @@ fire → damage → destroy → respawn** single-player loop (task #52). **2-nod
 end-to-end** — replication, cross-pod targeting/damage/kill, beam visuals, replicant gait (tasks
 #46-#51, [[multiplayer]]). All 8 cockpit canopies are authentic + the horizontal-FOV fix (task #55,
 [[cockpit-view]]); the Gyroscope is live byte-exact with hit-bounce (task #56); the **gauge system
-is complete** ([[gauges-hud]]). The engine/renderer/HAL/audio are done (WinTesla); the active work
+is complete** ([[gauges-hud]]). The engine/renderer/HAL are done (WinTesla); AUDIO backend is now REAL
+(the repo's OpenAL32.dll + libsndfile-1.dll were both no-op STUBS — replaced with real OpenAL Soft +
+an in-tree WAV loader, 2026-07-15) and the 241-sample soundbank is cracked from AUDIO1/2.RES + loading;
+the ONLY remaining audio gap is game-triggering (no AudioEntities fire PlayNote yet), so gameplay is
+still silent apart from a proof-of-life hook (see [[wintesla-port]] Audio). The active work
 is reconstructing each BT subsystem's authentic behavior from the binary. Remaining: pod-LAN
 config, Mech-level update records, per-subsystem waves. [T2]
 
diff --git a/context/rendering.md b/context/rendering.md
index 0cc598a..ecd0976 100644
--- a/context/rendering.md
+++ b/context/rendering.md
@@ -6,7 +6,7 @@ source_sections: "PROGRESS_LOG.md §10 (render-fidelity notes); docs/BGF_FORMAT.
 related_topics: [bgf-format, asset-formats, wintesla-port, locomotion, pod-hardware, cockpit-view]
 key_terms: [L4D3D, material-ramp, BSL, LOD, DPL, beam]
 open_questions:
-  - "Replacement-LOD for NON-additive multi-LOD models; day/night material path priority (BT_MATPRI)"
+  - "Replacement-LOD for NON-additive multi-LOD models"
 ---
 
 # Rendering
diff --git a/context/steamification.md b/context/steamification.md
index ed9332d..b361d3a 100644
--- a/context/steamification.md
+++ b/context/steamification.md
@@ -20,8 +20,31 @@ grouped roughly: toolchain → PadRIO input → MFD-split cockpit → front end/
 → NetTransport/Steam sockets → lobby → bindings/KeyLight → packaging.
 
 **Repo rule [T0]:** `origin` = `VWE/BT412.git` only. This repo must never touch the
-BT411 remote (no cross-pull remote — deliberate difference from RP412's `rp411`
-pattern). Forked at BT411 `4e72f0c` (2026-07-14).
+BT411 **remote** (the gitea URL) — no remote, no fetch/push to it. Forked at BT411
+`4e72f0c` (2026-07-14). *Bringing BT411 work forward is allowed via a **local-path**
+merge (`git fetch C:/vwe/BT411 master`) — that never contacts the gitea BT411 remote;
+see the merge note below.*
+
+## BT411 catch-up merge (2026-07-14)
+
+Merged BT411's post-fork line (`4e72f0c..abed41e`, 91 commits) into BT412 via a
+**local-path** merge — brought the whole **audio-fidelity system** (engine `AUD*` +
+`L4AUD*` + `audiopresets.cpp` + ~600 content `.wav`s, `docs/AUDIO_FIDELITY.md`),
+missiles/rear-fire/HUD/gyro/gait tasks (#66–68), `FOGDAY.EGG`, and refreshed context
+docs. Only **5 files** overlapped the steamification; resolutions:
+- `.gitignore`, `CMakeLists.txt`, `mech4.cpp` — trivial / auto-merged (the
+  `deviceOwnsInput` gating survived).
+- `L4NET.CPP` — took BT411's task-#50 fix (don't close the game listener on console
+  loss) over the seam's adaptation of the old buggy close; the point-to-point send
+  stays on `NetTransport_Get()->Connect()`.
+- `L4NETTRANSPORT.cpp` — folded BT411's **TCP_NODELAY** latency fix into
+  `WinsockNetTransport::Connect` (the seam already had BT411's retry-while-refused +
+  non-blocking). Accept-side game-socket NODELAY stayed at the L4NET call site.
+- `mechmppr.cpp` — combined the `device_owns_input` gating with BT411's task-#68
+  look-behind ('V' rear-view), gating the `lookBehind` write too (a live RIO device
+  feeds it through its mapped button).
+Verified after merge: clean build; solo front-end mode; loopback MP through the seam
+(mesh completes, both tick, replication, no NODELAY warnings). [T2]
 
 ## Status ledger
 
diff --git a/context/subsystems.md b/context/subsystems.md
index 3a3097c..b1962fb 100644
--- a/context/subsystems.md
+++ b/context/subsystems.md
@@ -6,7 +6,7 @@ source_sections: "PROGRESS_LOG.md §10d; docs/SUBSYS_PLAN.md; docs/VEHICLE_SUBSY
 related_topics: [decomp-reference, reconstruction-gotchas, combat-damage, gauges-hud]
 key_terms: [subsystem, factory, ClassID, subsystem-roster, PoweredSubsystem, bridge]
 open_questions:
-  - "Myomers coupling (gates on owning-player @mech+0x190); 0xBD3 damage-hub untangle (WAVE 8)"
+  - "Myomers coupling (gates on owning-player @mech+0x190); factory capability-roster loops 2-4 still dead (SubProxy stub)"
 ---
 
 # Subsystems
@@ -54,11 +54,11 @@ Making a base byte-exact GROWS every subclass — they must be re-based TOGETHER
 - **TASK #56 (2026-07-11)** — Gyroscope LIVE byte-exact (ctor @004b3778, sizeof 0x3D0 locked;
   integrators + `FUN_004b2980` damage fan-out; joint dispatch from the Mech performance tail
   @0x4aaf74/83; `BT_GYRO_LOG`/`BT_GYRO_TRACE`) — see [[cockpit-view]].
-- **DEFERRED** — SubsystemMessageManager 0xBD3 (WAVE 8 — a
-  **damage/explosion consolidation hub** cached to `Mech[0x10d]`=0x434; recon MISLABELS the slot
-  `controlsMapper` + the drive squats there while the real mapper is roster slot 0, so wiring it needs
-  an untangle. NOT the valve/advanced-damage gate — that's the owning **BTPlayer** @mech+0x190, see
-  [[combat-damage]]/[[open-questions]]). [T2]
+- **✅ DONE (task #7, `afefaee`)** — SubsystemMessageManager 0xBD3 (a
+  **damage/explosion consolidation hub** cached to `Mech[0x10d]`=0x434; the factory builds the REAL
+  class and `mech.hpp` names the slot `messageManager` — the old `controlsMapper` mislabel is swept,
+  the real mapper is roster slot 0. NOT the valve/advanced-damage gate — that's the owning **BTPlayer**
+  @mech+0x190, see [[combat-damage]]/[[open-questions]]). [T2]
 
 ## The watcher electrical chain (task #57, 2026-07-13 — the torso power gate)
 The Watcher branch is POWERED indirectly: a watcher WATCHES another roster subsystem and mirrors
diff --git a/context/translocation-warp.md b/context/translocation-warp.md
index 09faead..c119b58 100644
--- a/context/translocation-warp.md
+++ b/context/translocation-warp.md
@@ -6,7 +6,7 @@ source_sections: "multiplayer.md (lifecycle + trigger wiring, task #52); referen
 related_topics: [rendering, multiplayer, combat-damage, reconstruction-gotchas, asset-formats, bgf-format]
 key_terms: [material-ramp]
 open_questions:
-  - "AUTHENTIC peer path (seeing OTHERS' spheres) needs player SimulationState/DropZoneLocation replication; until then the LOCAL-player sphere stands in."
+  - "Peer warp IS wired + visible -- observer sees a peer's un-wreck warp (world-anchored BTStartWarpEffect, 160b78e). Remaining nuance [T3]: anchor to the peer's authentic DropZoneLocation (not replicated) vs the peer's world position."
   - "In the 2-node force-damage test only the EXPAND (respawn) warp logs reliably; confirm the COLLAPSE (death-side) fires on every MP death path."
 ---
 
@@ -118,9 +118,13 @@ it impossible to ignore. Generalized in [[reconstruction-gotchas]] §13.
 ## Trigger wiring (summary; full detail in [[multiplayer]]) [T2]
 Local player's own death → `BTStartWarpCollapsePOV()` (btplayer.cpp `VehicleDeadMessageHandler`,
 `deathCount==-1`, guarded `this==GetMissionPlayer()`). Respawn `DropZoneReply` → `BTStartWarpExpandPOV()`
-(local-guarded). `BTWarpForceUnmask()` on mission-end / no-DropZones. Observer replicant un-wreck fires
-the world-anchored `BTStartWarpEffect(x,y,z)` (mechdmg.cpp). The peer path is a stand-in until player
-`SimulationState`/`DropZoneLocation` replication exists.
+(local-guarded). `BTWarpForceUnmask()` on mission-end / no-DropZones. **Peer warp IS wired + visible
+(`160b78e`):** an observer sees a peer's death/respawn warp — the replicant un-wreck fires the
+world-anchored `BTStartWarpEffect(x,y,z)` at the peer's position (mechdmg.cpp:1074, gated to
+`ReplicantInstance`; `simulationState` rides every update-record header so the observer tracks the
+peer's state). The ONLY remaining nuance [T3, non-gating]: the observer's peer sphere is anchored to
+the peer's WORLD position rather than the peer's authentic `DropZoneLocation` (that attribute isn't
+replicated) — a fidelity refinement, not a missing effect.
 
 ## How it was solved (method) + verification [T2]
 1. **Dump the real asset** (`dump_tsphere.py`) — established it's a bicone with cylindrical UVs, ending
diff --git a/context/wintesla-port.md b/context/wintesla-port.md
index 84378bc..57e99b2 100644
--- a/context/wintesla-port.md
+++ b/context/wintesla-port.md
@@ -16,7 +16,117 @@ on top of it. Full detail: `docs/PROGRESS_LOG.md §5b, §8`.
 ## What WinTesla already did (do NOT rebuild)
 - **Renderer bypass: DONE** — `MUNGA_L4/L4D3D.cpp` + `DXUtils` replace libDPL / the IG board with
   Direct3D9. No `libdpl.lib` in the tree. (The early from-scratch D3D9 viewer was retired and removed.) [T1]
-- **Audio: DONE** — OpenAL + libsndfile replacing the HMI "SOS" engine. [T1]
+- **Audio: BACKEND now REAL + soundbank loaded; only game-triggering remains** [T2, updated
+  2026-07-15]. OpenAL replaces the HMI "SOS" engine and the renderer→device→buffer→source→play chain
+  IS all implemented (`L4AUDRND`/`L4AUDRES`/`L4AUDLVL`; `PatchLevelOfDetail::PlayNote` really calls
+  `alSourcePlay`). The "no sound, ever" root cause was DEEPER than a gate — **both audio backend DLLs
+  shipped in `engine/lib/` were no-op STUBS**: (a) `libsndfile-1.dll` exports 15 funcs BY ORDINAL
+  ONLY (no names), `sf_open()` always returns NULL; (b) `OpenAL32.dll` (72KB) imported **only
+  KERNEL32** — no dsound/wasapi/winmm — so it returned fake handles (`ctx=0x00000001`,
+  `alGenSources→0`) and never touched the hardware. So the chain ran clean and silent. FIXES (commit
+  5b46655): **OpenAL32.dll → real OpenAL Soft 1.25.2 Win32** (drop-in: the exe imports the 25 AL funcs
+  by NAME; `alSourcePlay` now reaches `AL_PLAYING`). **libsndfile DROPPED** — replaced by `LoadWavPCM()`
+  in `L4AUDRES` (a tiny in-tree RIFF/WAVE fmt+data reader, no external dep). Gates fixed earlier: the
+  `AWE_FRONT`/`AWE_REAR` env-var gate in `MakeAudioRenderer` was **relaxed to default-on** (`BT_NO_AUDIO=1`
+  disables). **Soundbank recovered**: 241 samples cracked from `AUDIO1/2.RES` (SF2 v1.0) by
+  `tools/sf2extract.py` → `content/AUDIO/*.wav` + the `allPresets[2][128]` table (`audiopresets.cpp`,
+  replacing the zero-init btstubs stub); all 241 load (`alErr=0`). **In-game triggering now WORKS** (commit 7b1e469): enabling audio unlocked
+  `L4AudioRenderer::CreateEntityAudioObjects`, which binds `AudioStateWatcher`s to entity/subsystem
+  state attrs BY NAME (the **attribute-pointer** databinding, same as gauges) and calls
+  `AddAudioWatcher` on the resolved `StateIndicator`. The reconstruction had pointed the Mech's state
+  attrs at the scalar read-pad `attrPad` (fine for a gauge that READs a value, fatal for a state watcher
+  that calls a METHOD → AV in `SChainOf::Add` on 0xCDCDCDCD). FIXED: the Mech's `AnimationState`/
+  `ReplicantAnimationState` (driven from `SetBodyAnimation`) and `CollisionState` (driven from
+  `ProcessCollision` via `collisionTemporaryState`) are now real `StateIndicator` members — **verified:
+  walking fires `SetupPatch`+`PlayNote`/`alSourcePlay` (footstep/gait patches 78/80/116)**. So mech
+  movement/animation/collision audio is live. **Subsystem STATE audio DONE** (commits 5ba541e/0e05a22/dcdd7dd):
+  the audio watcher TYPE per attribute was recovered via a `MakeObjectImplementation` ClassID trace
+  (class 28 = `AudioStateTrigger`/StateIndicator). KEY: the binary's 0x54-byte subsystem alarm
+  (`FUN_0041b9ec`, reconstructed as `GaugeAlarm54`) **IS a StateIndicator** — its "three sub-indicators"
+  @0x18/0x2c/0x40 are the audio/video/gauge watcher SChains, `level@0x14` = currentState. The
+  reconstruction had modeled that tail as an opaque `_tail` (never constructed → AddAudioWatcher AV'd on
+  0xCDCDCDCD). FIX: `GaugeAlarm54` now has three REAL constructed sockets + `AddAudioWatcher`; `SetLevel`
+  fires them on change (empty sockets = no-op, so other alarms/weapons unaffected; `levelB`/`LevelCountB`
+  untouched; sizeof stays 0x54). Then registered each state attr → its subsystem's own alarm (own
+  `AttributePointers[]` chained to the parent): `Generator.GeneratorState`→stateAlarm,
+  `Condenser.CondenserState`→condenserAlarm, `Reservoir.ReservoirState`→reservoirAlarm,
+  `AmmoBin.AmmoState`→ammoAlarm (+ chained AmmoBin's bare index so `SimulationState` resolves too).
+  `GeneratorOn`→generatorOn. **audiostate skips 85 → 0** — every StateIndicator audio attribute across
+  the mech + all subsystems binds to a real indicator, and the alarms are already `SetLevel`'d by the
+  sims, so generator/condenser/reservoir/ammo state sounds fire on transition. **Still inert** (read 0,
+  silent, non-crashing — no modeled backing member in the size-locked layouts, a polish follow-up):
+  `ReportLeak` (Logical), `Torso.MotionState` (Enum), `Torso.SpeedOfTorsoHorizontal` (Scalar).
+  NOW REAL (fidelity Phase 1, commit fc7f311): `ConfigureActivePress` published at the **MechSubsystem
+  BASE** (binary attr id 2, descriptor @0x50de5c → member @+0x110 — the field previously misnamed
+  `vitalSubsystemIndex`; idle −1, driven 0/−1 by `MechWeapon::ConfigureMappablesMessageHandler`),
+  `AmmoBin.FireCountdownStarted` → `cookOffArmed`@0x18C, `L4MechControlsMapper.TargetRangeExponent` →
+  `targetRangeExponent`@0x1a4. The **bring-up guards**
+  [T3, self-clearing] stay: a NULL subsystem attr → inert pad (was a fatal `Fail`); an
+  `AudioStateWatcher` on an unconstructed indicator (chain@+0x18 null/0xCDCDCDCD) → skip. Both pass
+  automatically once a subsystem is built. Diagnostics: `BT_AUDIO_LOG` (chain + skips/redirects), `BT_ATTRBIND_LOG` (every
+  attr bind), `BT_AUDIO_TEST` (proof-of-life buffer0).
+- **Audio FIDELITY pass (2026-07-16, commits fc7f311 + 691e885; the full audit ledger is
+  `docs/AUDIO_FIDELITY.md`, 37 findings).** Settled facts [T1 unless noted]:
+  - **Patch numbering = SF2 `wPreset`.** Any tooling must key presets on `wPreset`, never on phdr
+    record order. `AUDIO1/2.RES` are SF2 **v1.0** (16-byte shdr, NO name/rate/pitch field); pitch
+    metadata rides generators: 55 = SBK samplePitch (`root*100+cents`, on every zone), 58 =
+    overridingRootKey, 51/52 = coarse/fineTune. **EMU8000 v1 base rate = 44100 Hz** → a zone's true
+    data rate is baked into its WAV: `rate = round(44100·2^(((6000−rootCents)+tune)/1200))`
+    (`tools/sf2extract.py`); the engine's note-60 pitch model (`BTNotePitchFactor`) then reproduces
+    original playback at every note. SBK `initialAttenuation`(48) is **INVERTED** (127 = full
+    volume; 0.375 dB/step [T3 exact curve], baked into the PCM).
+  - **Full-zone table**: 603 zones / 241 presets in `audiopresets.cpp`; the authored MIDI note
+    SELECTS zones by keyRange in `SetupPatch/PlayNote` (key-splits: Loaded/Jam family low-36
+    clunk vs high-84 blip; Warnings01 8-way klaxon split), layers attach together,
+    `MAX_PRESET_SAMPLES=25` (AllExplosion). Authored loop REGIONS apply via `AL_SOFT_loop_points`;
+    authored `releaseVolEnv` (1.1–3.9 s on ~20 looping presets) fades on Stop
+    (`PRESET_serviceReleaseFades`, serviced from `AudioHead::Execute`).
+  - **Distance/volume/doppler**: OpenAL distance model is `AL_NONE` — the AUTHORED
+    `GetDistanceVolumeScale()` curve multiplies in `CalculateSourceVolumeScale` (Dynamic3D +
+    Static3D); per-source `AL_GAIN = volume_scale²` (GM CC7 squared law); `alDopplerFactor(0)` —
+    the authored `GetDopplerCents()` (AUDIO.INI model, consumer decomp part_008.c:7466) adds into
+    the Dynamic3D pitch chain.
+  - **Audio clock**: `FUN_0044e19c` is `ApplicationManager::GetFrameRate` — the original audio
+    "frames" were SYSTEM CLOCK TICKS; `MakeAudioRenderer` calibrates at
+    `SystemClock::GetTicksPerSecond()` (fallback 1000), never the old garbage
+    `divisionParameters+0x10` read.
+  - **Published `localVelocity` smoothing is authentic** [T1]: `Mech::Execute` (FUN_004ab430) runs
+    the localVelocity components through `AverageOf` running-average filters
+    (part_012.c:15169-15179); the port's ~0.25 s exponential filter in `mech4.cpp` reconstructs it.
+  - **Phases 3+4 SHIPPED (2026-07-16, commits 0ca7d26..0e2401f).** Phase 3 EFX: `L4AUDEFX`
+    bridge — per-source lowpass (Dyn3D = highFreqCutoffScale×brightness UNGATED, Static/Direct =
+    brightness; AWE 100–8000 Hz → 5 kHz-ref gainhf [T3 curve]), one EAXReverb slot at
+    global_reverb_scale 0.3 (3D wet / cockpit Direct dry), Direct position-enum placement.
+    Phase 4 attributes (all [T1] from binary attribute tables, walked as 16-byte
+    {id,name,off+1,pad} rows): **HeatSink table @0x50e438 (ids 3..12)** confirms every heat
+    binding + adds ReportLeak id 12 @0x138 = coolantActive (serves all 19 leak watchers via
+    PoweredSubsystem⊂HeatSink); **Mech table @0x50c0xx (ids 21..56)**: IncomingLock@0x3fc /
+    DistanceToMissile@0x400 (real members, Missile::MoveAndCollide reports, PerformAndWatch
+    latches; old `maxSpeed@0x400` was a misread of the FLT_MAX far default),
+    CollisionSpeed@0x4B4 (=|impact velocity| at contact-arm), ReduceButton@0x340,
+    FootStep@0x394, RearFiring@0x410 (old `stateFlags` misread); **Torso table (ids 3..15)**:
+    full publish onto existing members (SpeedOfTorsoHorizontal=twistVelocity@0x1E8 abs'd,
+    MotionState=statusFlags@0x20C, ==2 = limit-hit frame).  **F5 footStep = CONTACT LEVEL**:
+    (jointlocal.y <= *ANI hdr[2] threshold) per frame, states 0/1 retain (SelectSequence now
+    captures hdr[2]; the 150 ms pulse is retired).  **F19**: the authored footstep volume =
+    LocalAcceleration |lin| [0,10]→ctl100 + LocalVelocity |lin| [0,0.6]→ctl101 (ALL motion
+    watchers extract |linearMotion|, motionValue=3); localAcceleration.linear = d(published
+    velocity)/dt (binary part_012.c:15186-15195); the mech2.cpp step broadcast is REMOVED.
+    **attrnull count = 0** — every authored audio attribute binds a real member.
+  - **Post-Phase-4 closures (2026-07-16):** UnstablePercentage is LIVE (the instability model
+    @0x3F0 byte-decoded + reconstructed — accel-sway² + gun-the-engine + turn-in-place terms,
+    feeds gyro swayBias + the audio alarm; commit c51d64a). The F14 per-zone static resonant
+    low-pass is BAKED (RBJ biquad at the AWE 100–8000 Hz curve, float pipeline + peak
+    normalization; 232 zones incl the LaserLoaded charge hum fc=57 Q=87; c581553). The
+    **footstep 10–20 s warm-up bug** is fixed (a11a697): an idle source's watcher chain executes
+    only at Start attempts and each hop is audio-frame-gated, so the authored fill-0 N=30
+    smoothers starved behind the 0.3 transient drop gate — fixes: AudioScaleOf sends EVERY poll
+    (the bitwise change-gate froze on our deterministic gait floats), recursive gate-free
+    Component::PrimeWatchers(30) on every transient Start request (AUDREND), and
+    localAcceleration via the binary's exact 15-sample ring buffers.  LESSON: trace caps
+    saturate early and fake "per-stride" rates — always timestamp before inferring cadence.
+  - Still deferred: F21 attack velocity/time (all captured events were default 1), F22 HRTF
+    (user has 2 speakers; enable via alsoft.ini `hrtf=true` for headphones).
 - **L4 HAL on Windows + the VS build system: DONE.** [T1]
 - **Red Planet game logic: COMPLETE & buildable** — `VTV/VTVMPPR/WEAPSYS/...`. RP is at/near playable. [T1]
 - **Multiplayer: the DOS `NETNUB` driver is already replaced by a ~3.5k-line WinSock2 TCP
diff --git a/docs/AUDIO_FIDELITY.md b/docs/AUDIO_FIDELITY.md
new file mode 100644
index 0000000..efa6a73
--- /dev/null
+++ b/docs/AUDIO_FIDELITY.md
@@ -0,0 +1,621 @@
+# Audio Fidelity Audit — btl4.exe OpenAL Port vs. Original AWE32/HMI-SOS
+
+> **STATUS (2026-07-16): Phases 1-4 SHIPPED** (commits fc7f311, 691e885, 0ca7d26,
+> cc2b109..0e2401f).  Fixed: F1-F5, F7, F9-F13, F15, F16, F18-F20, F23, KB items;
+> F6 fixed (ReportLeak -> coolantActive@0x138, binary table [T1]); F14 FIXED
+> (attenuation + the static resonant fc/Q low-pass both baked, c581553);
+> F17 FIXED (CollisionSpeed + ReduceButton real; UnstablePercentage live --
+> the instability model @0x3F0 is byte-decoded and reconstructed, task #66);
+> F8/F21/F22 open (voice budget unhit / attack polish / HRTF option).
+> Post-audit: the footstep cold-start warm-up bug (idle watcher chains +
+> fill-0 smoothers vs the transient drop gate) fixed in a11a697.
+> attrnull = 0: every authored audio attribute binds a real member.
+
+
+**Date:** 2026-07-15
+**Scope:** Full fidelity audit of the OpenAL audio reconstruction against the original 1995
+semantics: the authored audio object streams (`content/audit_capture.log` traces), the WinTesla
+engine source (`engine/MUNGA`, `engine/MUNGA_L4`), the Ghidra decomp of `BTL4OPT.EXE`
+(`reference/decomp/all/part_*.c`), and the SF2 v1.0 soundbanks (`content/AUDIO/AUDIO1.RES`,
+`AUDIO2.RES`).
+**Method:** Parallel findings independently generated, then adversarially verified (every count
+re-derived from the banks with fresh parsers, every file:line re-read, decomp cross-checked, live
+capture re-parsed). Verdicts: CONFIRMED = independently reproduced; PARTIAL = core claim holds
+with material corrections (the corrected form is what appears below); UNVERIFIED-LOW = low-impact,
+not independently re-verified.
+**Excluded (already known-fixed):** note-pitch application (`BTNotePitchFactor`), calibration rate
+1000, ExecuteWatchers poll restoration, configure-ticker -1 pad, published-velocity smoothing.
+
+---
+
+## 1. Executive Summary
+
+Honestly: the **control architecture is in good shape, the rendering back-end is not.** The
+watcher/sequence/mixer graph is substantially reconstructed and live — all 118 authored state
+watchers bind real StateIndicators, weapons/footfalls/generators demonstrably fire, and the
+patch-numbering and calibration questions are settled in the port's favor. But roughly a quarter
+of attribute-gated watchers sit on dead attributes (the coolant-leak warning, the accelerating
+missile-lock beeper, the torso-twist servo, the instability alarm can **never** sound), and on the
+synthesis side nearly every axis diverges from what the AWE32/EMU8000 actually did: the SF2
+extractor keeps one zone per preset (discarding key-splits, layers, and stereo pairs the engine
+already has plumbing for), drops all tuning metadata (~83% of presets play >= 1 semitone off,
+worst -36 st), the volume law is linear where the original was the squared GM CC7 curve, the
+authored distance/doppler/reverb/filter/pan models are all computed and then discarded in favor of
+wrong or absent OpenAL defaults.
+
+**Rough fidelity per dimension:**
+
+| Dimension | Est. fidelity | Basis |
+|---|---|---|
+| Triggers / databinding | **~75%** | 54 of ~225 attribute-gated watchers dead (24%); all 118 state watchers live; footstep timing semantics wrong; one port invention actively fights an authored feed |
+| Volume / attenuation | **~40%** | Per-source gain curve wrong everywhere (linear vs squared), distance curve wrong shape for all 3D sounds, per-zone layer gains dropped, cull/steal/ducking side-effects |
+| Looping | **~85%** | Authored loop regions ~= whole sample for everything looped today (worst artifact ~5% period error / wrap click); missing 1.1-3.9 s release fades on ~20 looped presets; one **latent** catastrophic loop once multi-zone lands |
+| Pitch / timbre | **~25%** | ~83% of presets >= 1 semitone off (root-key/tuning dropped); zero filtering (brightness, distance muffling); doppler wrong sign and depth |
+
+---
+
+## 2. Ranked Findings (audible impact x confidence)
+
+| # | Finding | Impact | Verdict | One-line effect |
+|---|---|---|---|---|
+| 1 | [Multi-zone preset collapse](#f1) | High | CONFIRMED | Key-splits/layers/stereo dropped: wrong klaxons, looping charge-hum instead of clunk-then-blip, explosions lose body and rumble |
+| 2 | [Root-key & tuning dropped](#f2) | High | CONFIRMED | 91/115 + ~102/126 presets play >= 1 semitone off (worst -36 st; klaxons ~6x slow, footsteps 27% fast) |
+| 3 | [Distance attenuation wrong](#f3) | High | CONFIRMED | Authored knee/rolloff curve dead; AL linear ramp makes mid/far battle audio far too quiet; cull/steal/ducking distance-blind |
+| 4 | [Volume curve linear vs CC7 squared](#f4) | High | CONFIRMED | Every intermediate volume ~+6 dB too loud at mid-scale; authored dynamic range compressed |
+| 5 | [FootStep trigger semantics](#f5) | High | CONFIRMED | Binary: per-frame root-height contact level vs threshold; port: fixed 150 ms pulse per clip transition — wrong step timing/counts |
+| 6 | [ReportLeak dead — coolant warning](#f6) | High | CONFIRMED | Largest dead block (38/54 match watchers, 19 subsystems); leak klaxon can never sound |
+| 7 | [Missile-lock alarm dead](#f7) | High | CONFIRMED | IncomingLock + DistanceToMissile on read-only pad; accelerating lock beeper can never start |
+| 8 | [Dead-watcher coverage matrix](#f8) | High | PARTIAL | 54 of ~225 attribute-gated watchers on dead attributes (~24%); itemized worklist |
+| 9 | [Brightness / low-pass chain dead](#f9) | Medium | CONFIRMED | AWE NRPN-21 filter path computed then discarded; no distance muffling, ctl-5 brightness inert |
+| 10 | [Doppler triply wrong](#f10) | Medium | CONFIRMED | Authored cents model dead; AL doppler at wrong constants with sign-inverted velocity — approaching sources pitch DOWN |
+| 11 | [Reverb dead](#f11) | Medium | CONFIRMED | Original: CC91=38 wet exterior / 0 dry cockpit (decomp-proven); port: bone-dry everywhere |
+| 12 | [Front/rear + pan placement dead](#f12) | Medium | CONFIRMED | DirectPatch position enum and internal spatialization discarded; all cockpit/static sounds dead-center |
+| 13 | [Loop regions & release envelopes](#f13) | Medium | CONFIRMED/PARTIAL | Today: minor wrap artifacts (worst ~2.4 Hz tick in beam hum) + instant cuts where 1.1-3.9 s releases were authored; latent boom-loop bug once multi-zone lands |
+| 14 | [Zone gain/filter/envelope generators dropped](#f14) | Medium | PARTIAL | Per-zone attenuation (inverted SBK scale), authored resonant low-pass on charge hum, volume envelopes all lost |
+| 15 | [ConfigureActivePress mispublished](#f15) | Medium | CONFIRMED | Weapon-configure ticker can never fire; field exists but is misnamed and unpublished |
+| 16 | [Torso-twist servo whir dead](#f16) | Medium | CONFIRMED | Torso publishes no attributes; whir never starts, pitch tracking dead |
+| 17 | [Entity attrPad family](#f17) | Medium | CONFIRMED | Instability alarm never sounds; impact sounds never scale with speed; ReduceButton feedback dead |
+| 18 | [FireCountdownStarted = cook-off warning](#f18) | Medium | PARTIAL | Dead binding confirmed; it is the ammo COOK-OFF countdown (member exists: `cookOffArmed`), not a salvo cue |
+| 19 | [Step-intensity invention fights authored feed](#f19) | Medium | PARTIAL | Unauthored curve + direct mixer writes clobbered by the live authored LocalVelocity feed every step (drops footsteps) |
+| 20 | [Zoom blip unpublished](#f20) | Low | UNVERIFIED-LOW | Live member exists, one ATTRIBUTE_ENTRY missing |
+| 21 | [Attack velocity / attack time dead](#f21) | Low | UNVERIFIED-LOW | Mechanism dead but authored data barely uses it today |
+| 22 | [ITD / between-ears spatialization dead](#f22) | Low | UNVERIFIED-LOW | 4-channel pod model computed and discarded; matters mostly for pod-hardware target |
+| 23 | [Benign inventions check](#f23) | Low | UNVERIFIED-LOW | Footstep pulse OK; AnimationState numbering unverified (17 authored triggers never fired); CollisionState 0/1 vs 4-state |
+
+**No-gap confirmations (validated, no change needed):** patch numbers are SoundFont wPreset
+values (the port's mapping is correct — never "fix" toward file index); the calibration rate 1000
+is structurally equivalent to the original clock-tick rate (but the `DPLARG+0x10` read is baseless
+and the KB claim should be corrected); the port's published-velocity smoothing matches the
+binary's `AverageOf` filter chain in kind. See [Section 4](#validations).
+
+---
+
+## 3. Findings in Detail
+
+### A. Sample bank / synthesis fidelity
+
+<a name="f1"></a>
+#### F1. Multi-zone preset collapse — key-splits, layers, stereo pairs all dropped (High, CONFIRMED)
+
+The SF2 extractor (`tools/sf2extract.py:49-62`) keeps only the FIRST sample-bearing instrument
+zone per preset, so the generated table (`game/reconstructed/audiopresets.cpp`) has
+`sampleNum=1`/`samples[0]` everywhere — discarding authored multi-zone content that the engine
+already supports (`PRESETINFO.samples[5]`, `GetVoiceCount=PRESET_getNumSamples`, SetupPatch
+buffer-per-source; `engine/MUNGA_L4/L4AUDLVL.h:33-34,68-70`, `L4AUDLVL.cpp:30,130-167`).
+
+Verified against the banks: **68/115 bank1 and 94/126 bank2 presets are multi-zone.**
+
+- **Key-splits (7+7 presets)** — the authored MIDI note SELECTS the sample. `Warnings01` (bank2
+  p113) is an 8-way split (keyRanges 16-17/19-21/23-24/26-28/29-31/33-35/36-38/40-41, 8 distinct
+  klaxon samples, three looped); the weapon Loaded/Jam/Misfire family (bank1 p36,40,41,56,70,71,75)
+  splits at key 59|60: low clunk/charge zone (root 36) vs high ready-blip zone (root 84). The
+  captured streams author exactly these selector notes: five sequences send [36,36,84,84]
+  (`audit_capture.log:501,566,681-683`, plus one [36,36,70,70]); the warnings sequence (log:343)
+  sends 16,16,19,19,23... matching `Warnings01`'s split points exactly.
+- **Layers (~55+84 presets)** — 2-4 simultaneous samples (LaserAFire01=3, MissileLaunch01=4,
+  AutoCanonFire01=3, MechExplosion01=16 zones in 4 key bands). Roughly two dozen bank1 /
+  three-dozen-plus bank2 presets mix looped sustain layers under one-shot attacks — every
+  LaserExplosion/BigExplosion/PPCExplosion has a looped tail-rumble layer the port drops.
+- **Stereo pairs (6+3)** — pan 0/127 zones, some with different L/R samples (EngineAccel02
+  sid2/sid38), plus 5 bank1 L/C/R 3-zone presets.
+
+**Net effect verified live:** on weapon-ready the port loops the charge hum at the wrong pitch
+instead of clunk-then-blip (log:832-840: note-36 START then `SetupPatch ENTRY bank=1 patch=56
+file=LaserLoaded01.wav`, table loop=LoopAtWill); all 8 cockpit warning klaxons play the same
+sample; explosions/lasers lose their layered body and sustained rumble.
+
+**Fix:** regenerate the table with ALL zones — per-zone WAV, keyLo/keyHi, loop mode, pan — into
+`samples[0..n]` (cap 4 per the AWE comment for layers sharing a keyRange). In SetupPatch/PlayNote,
+attach only zones whose keyRange contains `GetCurrentNoteValue()`, attach all matching layers, set
+position/pan for 0/127 pairs. Table + SetupPatch work only; voice-count plumbing already exists.
+
+<a name="f2"></a>
+#### F2. Root-key and tuning metadata dropped — most of the bank plays at the wrong pitch (High, CONFIRMED)
+
+The port plays every sample as if its root were MIDI 60 at 22050 Hz (`tools/sf2extract.py:24`
+hardcodes SAMPLE_RATE=22050; the generator scan at lines 50-62 reads only opers 41/53/54;
+`L4AUDIO.cpp:21-24` BTNotePitchFactor=2^((note-60)/12)). But the SF v1.0 banks carry full SBK
+pitch metadata the extractor drops:
+
+- **Generator 55** (SBK-only samplePitch, per awesfx `sfitem.c`/`parsesf.c`: root=amount/100 plus
+  fractional cents) — present on **all 603 sample zones**, constant per sample.
+- **Generator 58** (overridingRootKey) on 183+247 zones; **coarseTune(51)** on 138+258 zones
+  (modal value -12); **fineTune(52)** on 30+9.
+- EMU8000 v1 base rate is 44100 Hz (awesfx `sffile.c`: v1 samplerate hardcoded 44100), so a zone's
+  true data rate is 44100*2^(tune/1200). Recovered rates land exactly on 22050/44100/11025/5512 Hz
+  plus integer-semitone offsets — corroborating the model. There is **no rate generator**: 22050
+  is only the modal effective rate, not a bank-wide truth.
+
+Per-zone port error is **constant across notes**: err_cents = (effRoot-72)*100 - tune; zero only
+for the common root-60/coarse -12 configurations (why the note-pitch fix sounded right on those).
+**Prevalence: 91/115 bank1 and 102/126 bank2 presets >= 1 semitone off.** Worst verified cases:
+Death01/MechExplosion01 -36 st; Warnings01 -31 st (klaxons ~5.9x too slow at authored note 16);
+ProjectileLoaded01 -30 st; TorsoTwistExt01/CoolantDumpExt01/LaserCSustain01-03 worst-layer +24 st;
+LaserACharge01-04 +17 st; MissileLoaded01 -24 st; FootFallInt01 +4.2 st (footsteps ~27% fast).
+Authored sequence notes equal zone roots exactly (36/84 splits; Warnings roots 16-40) — final
+cross-check.
+
+**Fix (algebraically exact, no engine change):** bake per-zone tuning into each extracted WAV's
+declared rate = round(44100*2^(((60-effRoot)*100+tune)/1200)); OpenAL resamples from the declared
+rate, so the existing note-60 pitch model reproduces original playback at every note. Note the
+extreme recovered rates (~162 Hz to 176.4 kHz on a few Death01/torso zones) and the dependency on
+per-zone WAVs (F1) for key-split/layered presets.
+
+<a name="f13"></a>
+#### F13. Loop regions and release envelopes (Medium, CONFIRMED with an important correction)
+
+Two verified sub-findings, one of which corrects the naive reading:
+
+1. **Whole-buffer looping is close to faithful today.** SetupPatch sets AL_LOOPING on the entire
+   buffer (`L4AUDLVL.cpp:158-164`) while authored loops are [dwStartLoop,dwEndLoop] sub-regions
+   that `sf2extract.py` reads but discards (line 64 vs 70). However, every looping sample in the
+   banks is sampleModes=1 (loop continuously; none are mode-3) with loop regions covering
+   **95-100%** of the sample — the whole sample effectively IS the loop. No attack transient
+   replays per cycle. Worst real artifacts among currently-looped zone0s: LaserBSustain family at
+   95.0% (348-sample lead-in + 106 tail per ~0.41 s => ~2.4 Hz discontinuity in the beam hum),
+   LaserCSustainExt01-04 (283+41/11657), EngineMotor02/EngineAccel02/06 (324+271/35747),
+   MechFireLoop01/SmallFireLoop01 (406+94/47586) — plus a wrap-point click (port wraps end->start
+   instead of loopEnd->loopStart).
+2. **The genuine gap is Stop.** `StopNote` (`L4AUDLVL.cpp:216-217`) is
+   alSourceStopv+alSourceRewindv — an instant cut — but **~20 looping presets carry an authored
+   releaseVolEnv of 1.1-3.9 s** (EnginePower/Motor/Accel/Damage ~1.55 s, EngineAccel01 3.9 s,
+   TorsoTwist 1.2-1.4 s, LaserCharge 1.3 s, MissileTravel/Loading ~1.3 s, Coolant/Wind/Fire loops
+   ~1.1 s) that the AWE32 applied as a fade on note-off while the loop continued. One-shots have
+   no authored release; instant stop is faithful there.
+3. **Latent hazard:** the only catastrophic (<60%) loop regions sit in currently-dropped layers:
+   MechExplosion01/AuxExplosion01 share sample sid39 with loop [23517,23865] of 23875 (**1.5%** —
+   a ~16 ms sustain slice at the end of the boom). Today these presets are one-shot zone0
+   (ForceStatic, `audiopresets.cpp:805-808,949-952`); once multi-zone extraction (F1) lands,
+   whole-buffer looping would replay the full ~1.08 s boom every cycle. **Loop-region support must
+   ship with or before F1.**
+
+**Fix:** extract loopStart/loopEnd per zone into the table; use AL_SOFT_loop_points (a **buffer**
+property: `alBufferiv(AL_LOOP_POINTS_SOFT,...)` before attach) or split attack+loop buffers via
+queueing. On Stop, ramp AL_GAIN over the per-preset authored release time before stopping.
+
+<a name="f14"></a>
+#### F14. Per-zone gain / filter / envelope generators dropped (Medium, PARTIAL)
+
+`tools/sf2extract.py` (reads only gens 41/53/54) and the playback path drop everything the EMU8000
+applied in hardware:
+
+- **initialAttenuation** on 198 bank1 / 309 bank2 zones. SBK units are **INVERTED vs SF2** — 127 =
+  full volume, lower = quieter (observed range 90-127); used for layer balance (LaserBFire01's
+  panned side layers at 100 vs center at 120 — note: the sides are the *quieter* layers).
+- **initialFilterFc** on 116 zones/bank, **initialFilterQ** on 56/23. Example: LaserLoaded01's
+  looped charge-hum zone — the very zone the extractor picks — is fc=57 Q=87, an authored resonant
+  low-pass the port plays unfiltered and therefore much brighter/harsher. No filter is ever
+  applied (`L4AUDIO.cpp:1067-1086` computes a cutoff, sets nothing).
+- **Volume envelopes** (attackVolEnv 167/211 zones, releaseVolEnv 34/6, decayVolEnv 41/127) — see
+  F13 for the release consequence. SAMPLEINFO (`L4AUDLVL.h:22-29`) has no fields for any of this.
+
+**Fix:** add per-zone gain scale (mind the inverted scale: gain ~ f(127-atten); verify the exact
+dB mapping against awesfx before trusting "0..-9.6 dB" [T3]), bake or EFX-apply the static
+low-pass, and map release to a Stop-path gain ramp.
+
+<a name="f21"></a>
+#### F21. Note velocity / attack time dead (Low, UNVERIFIED-LOW)
+
+The original started every note with MIDI velocity = attackVolumeScale*127 and (when flagged) sent
+AWE NRPN 11 attack time (decomp @004638a8, part_008.c:7144-7154; @00463ddc :7367-7392). The port
+computes `midi_velocity`/`midi_attack_time` and discards both (`L4AUDIO.cpp:980-991`; PlayNote
+takes no velocity); ctl 6/7 handlers store scales nothing reads. Mitigation: all 41 captured
+AttackVolume events are value 1 (= default) and zero ctl=7 events, so today's audible loss is
+small. Fix when convenient: multiply start-time AL_GAIN by attackVolumeScale (through the F4
+squared curve) and implement attack time as a gain ramp (range 0..5.94 s per
+`L4AUDHDW.h:63,67`).
+
+### B. Mixing and spatial model
+
+<a name="f3"></a>
+#### F3. Distance attenuation: authored curve dead, wrong AL model live (High, CONFIRMED)
+
+AUDIO.INI authors amplitude_rolloff=2.0 (exponent), knee=60, distance_scale=0.003,
+clipping_radius=450 (AUDIOMR: 0.002): flat volume inside 60 units, then 1/(1+(0.003*(d-60))^2) —
+still ~42% at the clip edge. The engine computes this into `distanceVolumeScale` on every source
+execute (`AUDLOC.cpp:358-377` via `AUDSRC.cpp:822`), but its only consumer —
+`volume_scale *= GetAudioLocation()->GetDistanceVolumeScale()` in
+`Dynamic3DPatchSource::CalculateSourceVolumeScale` — is **commented out** behind an early return
+(`L4AUDIO.cpp:1470-1496`, comment at :1493-1495). Instead: hardcoded
+`alDistanceModel(AL_LINEAR_DISTANCE)` (`AUDIO.cpp:98`) with never-set
+AL_REFERENCE_DISTANCE/AL_ROLLOFF_FACTOR (defaults 1.0) and AL_MAX_DISTANCE=clipRadius*clipScale
+(`L4AUDIO.cpp:1109,1461,1997`) — a straight-line fade to zero.
+
+Numbers (clippingScale=1): d=60: AL 0.87 vs authored 1.0; d=100: 0.78 vs 0.99; d=300: 0.33 vs
+0.66 (-6 dB); d=440: 0.02 vs 0.44. **Distant battle sounds are drastically too quiet.**
+Confirmed side-effects of the distance-free engine volume: (a) the LowAudioVolumeThreshold=0.3
+transient-start cull (`AUDREND.cpp:197,223-237`) is distance-blind; (b) AudioWeighting voice-steal
+(`AUDSRC.h:526-536`, `L4AUDRND.cpp:1175`) no longer favors near sources; (c) the CalculateMix
+ducking chain (`L4AUDRND.cpp:684-811`, compression 0.92/8.5) treats far sources as full-presence.
+
+**Fix (near one-liner, highest leverage in the audit):** `alDistanceModel(AL_NONE)`, restore the
+commented distance multiply (the spatial model is already updated each Execute), apply
+`distanceVolumeScale` in Static3D's gain write too, drop the AL_MAX_DISTANCE attenuation writes.
+Restores curve + cull + steal + ducking simultaneously.
+
+<a name="f4"></a>
+#### F4. Volume curve: linear AL_GAIN vs the CC7 squared law (High, CONFIRMED)
+
+The original's volume path ended in MIDI CC7 = ftol(volume_scale*127+0.5) on the AWE32
+(decomp @00463bbc part_008.c:7205-7218; @004641e0 :7538-7583 — the 127.0/0.5 constants
+byte-verified in the EXE; the engine's own retained MIDI source at `L4AUDIO.cpp:2146-2239`
+confirms). The GM/SoundFont-standard CC7 curve is concave: amplitude ~ (v/127)^2, i.e.
+40*log10(v/127) dB (standard-based inference for the binary Creative driver — flagged, not
+decompilable). The port writes the identical volume_scale LINEARLY to AL_GAIN at **three** sites:
+`L4AUDIO.cpp:1110` (DirectPatch), `:1459` (Dynamic3D), `:1995` (Static3D).
+
+Result: every intermediate volume plays ~+6 dB louder than the arcade at mid-scale (0.5: -6 dB vs
+-12 dB; 0.3: -10.5 dB vs -21 dB) — the authored dynamic range is compressed and quiet
+ambience/servo layers sit far too high against weapons/engine.
+
+**Fix:** square volume_scale (or apply the exact concave transform, optionally quantized to 127 CC
+steps) at all three AL_GAIN sites. Do NOT square the master listener gain (a common factor; the
+port's 0.6 is calibration, not authored).
+
+<a name="f9"></a>
+#### F9. Brightness / low-pass filter chain dead — no distance muffling, ctl-5 inert (Medium, CONFIRMED)
+
+The original continuously drove the AWE32 initial-filter-cutoff NRPN 21 (100-8000 Hz per
+`L4AUDHDW.h:65-68`, scaled by the patch's authored MaxMIDIFilterCutoff) from ExecuteModel —
+decomp-verified per source type: DirectPatch = brightnessScale (gated on useBrightness;
+@00463bbc, part_008.c:7191-7203); **Dynamic3D = highFreqCutoffScale x brightnessScale, ungated,
+all four quadrant channels** (part_008.c:7496,7589-7604) — every moving 3D sound got duller with
+distance; Static3D = brightnessScale only (part_008.c:7831-7884).
+
+The port computes the values and applies nothing: `L4AUDIO.cpp:1067-1086` only updates the
+`lastMIDIFilterCutoff` bookkeeping member; Dynamic3D's ExecuteModel has no filter path; Static3D's
+NRPN block is inside the comment spanning :2020-2245; **no alFilter/EFX call exists anywhere**
+(only stock SDK headers). The authored distance HF rolloff (AUDIO.INI:23-25: exponent 2.0, knee
+60, scale 0.0035; AUDIOMR 0.003) is still computed per frame into `highFreqCutoffScale`
+(`AUDLOC.cpp:386-405`) — `GetHighFreqCutoffScale()` has zero callers. Brightness ctl 5 (2 authored
+bindings, log:199,285), use_brightness_scale, per-patch maxMIDIFilterCutoff, and the reconstructed
+footstep Brightness-mixer feed (`mech2.cpp:318`) all drive a dead sink. Everything plays
+spectrally full-bright at all distances.
+
+**Fix:** one EFX AL_FILTER_LOWPASS per source; AL_DIRECT_FILTER with GAINHF from
+highFreqCutoffScale x brightnessScale (Dynamic3D), brightnessScale alone (Static3D/DirectPatch,
+respecting useBrightness), mapped through the AWE curve (~100 + cutoff*7900/127 Hz).
+
+<a name="f10"></a>
+#### F10. Doppler: authored model dead, AL doppler wrong constants AND wrong sign (Medium, CONFIRMED)
+
+Triply wrong, decomp-verified intent:
+
+1. The authored model (AUDIO.INI:30-31 doppler_range=600 cents, speed_of_sound=250 u/s) is
+   computed every spatial update into `dopplerCents` = 600*(1-250/(250-v)) with near-ear fade and
+   +/-c clamp (`AUDLOC.cpp:451-508`) — and **the decomp proves the original consumed it**: the
+   dynamic patch source ExecuteModel adds audioLocation+0x58 (dopplerCents) to
+   CalculateSourcePitchOffset before the MIDI pitch-bend clamp (part_008.c:7466). In the port,
+   `GetDopplerCents()` has zero callers.
+2. Instead AL doppler is enabled with hardcoded `alDopplerFactor(0.3f)` (`AUDIO.cpp:99`) and
+   `alSpeedOfSound` never called (default 343.3) — neither constant nor curve shape matches.
+3. The velocity feeds are sign-inverted relative to the position frame: AL_POSITION = source
+   relative to head, but AL_VELOCITY = **negated** source world velocity with head velocity never
+   subtracted (`L4AUDIO.cpp:1429-1433,1458,1460`); listener velocity is also negated
+   (`AUDIO.cpp:155-158`) but cancels under AL_SOURCE_RELATIVE.
+
+Net: an approaching missile/mech pitches **DOWN** (~-88 cents at 60 u/s, ~-145 at 100 u/s) where
+the original gave +116 cents at 60 u/s approaching, and the player's own motion produces no
+doppler at all.
+
+**Fix (faithful, per the decomp):** disable AL doppler and add GetDopplerCents() into the
+Dynamic3D pitch-cents chain (2^((cents_chain + dopplerCents)/1200) x note factor). The original
+applied doppler only on the dynamic multi-channel path — keep static/direct sources doppler-free.
+
+<a name="f11"></a>
+#### F11. Reverb: authored wet-exterior / dry-cockpit split dead (Medium, CONFIRMED)
+
+Decomp-proven original behavior: the 3D patch-source StartImplementation (FUN_00463ddc,
+part_008.c:7278-7394) reads global_reverb_scale=0.3 (AUDIO.INI:47, stored at head+0x4C) and sends
+MIDI CC91 = 38 on all four AWE32 channels; DirectPatchSource (FUN_004638a8, part_008.c:7104-7140)
+sends CC91 = 0 — deliberate wet-exterior vs dry-cockpit contrast. In the port all send sites are
+commented out (`L4AUDIO.cpp:949, 1253-1263, 1759-1771`), `GetGlobalReverbScale` has no live
+callers, and no EFX effect/aux slot is ever created. Everything plays bone-dry; the arena-space
+cue separating outside sounds from cockpit UI is gone. (Note: the code was already commented in
+the repo's initial commit — an inherited gap from the WinTesla conversion, still a fidelity gap.)
+
+**Fix:** one EFX EAXReverb aux slot at init (gain from global_reverb_scale, AWE32-like preset);
+AL_AUXILIARY_SEND_FILTER on Dynamic3D/Static3D sources only; Direct sources dry.
+
+<a name="f12"></a>
+#### F12. Front/rear + pan placement: all cockpit and static sounds dead-center (Medium, CONFIRMED)
+
+The original routed every DirectPatchSource by its authored 6-value position enum
+(Front/Rear/FL/FR/RL/RR, `L4AUDIO.h:355-362`): positions 0/2/3 to the FRONT sound card, 1/4/5 to
+the REAR (decomp @00463848, part_008.c:7051-7062; the pod required two cards, AWE_FRONT/AWE_REAR),
+with MIDI pan CC10 = 0x3F center / 0x00 left / 0x7F right (@004638a8, part_008.c:7119-7140). The
+port reads audioPosition from the stream (`L4AUDIO.cpp:795`) but every use is commented out
+(:854-868, :902-916, :952-966); SetupPatch pins all sources AL_SOURCE_RELATIVE at (0,0,0)
+(`L4AUDLVL.cpp:150-156`) and DirectPatch ExecuteModel never writes AL_POSITION. Similarly,
+Static3DPatchSource with useInternalSpatialization (the BuildFromPage default) computes its
+quadrant spatialization at start (:1613-1641) but consumes it only in commented code; the live
+position member is written solely by the collision trigger (`L4AUDWTR.cpp:149`) — all other
+internal statics also play centered. (Caveat: which authored content is off-center is inferred
+from the enum + original routing code; the mechanism centers ALL of it regardless.)
+
+**Fix:** since sources are already AL_SOURCE_RELATIVE, set AL_POSITION per enum in
+DirectPatchSource::StartImplementation (front=-Z, rear=+Z, left=-X, right=+X; MUNGA azimuth 0
+maps to +Z=rear per the CalculateSpatialization +180 shift). For internal-spatialization statics,
+derive AL_POSITION from the already-computed azimuth. Keep distance ~1 so the distance model does
+not attenuate them.
+
+<a name="f22"></a>
+#### F22. ITD / between-ears model dead (Low, UNVERIFIED-LOW)
+
+itd_difference=0.0015 and distance_between_ears=2.0 feed the L4AudioSpatialization 4-channel model
+(per-quadrant delays, transient ITD pitch offsets, the between-ears front/rear power crossfade) —
+all computed, all discarded (Get*ITDPitchOffset: zero callers; the quadrant-gain consumers are the
+commented MIDI sends). Lost: interaural time cues and the smooth blend when a source passes
+through the head (it now snaps across the stereo field). Faithful minimum: blend AL_POSITION
+toward the origin inside distance_between_ears/2; OpenAL Soft HRTF supersedes the ITD constant for
+desktop; full quadrant gains only matter when driving the pod's physical 4-speaker pairs.
+
+### C. Triggers and databinding
+
+<a name="f8"></a>
+#### F8. Coverage matrix: ~24% of attribute-gated watchers are dead (High, PARTIAL — corrected counts)
+
+From the 35 s capture (118 statecfg + 54 matchcfg + 23 trigcfg + 29 scalecfg = 224 attribute-gated
+configs; attrbind=227, attrnull=53): **53 (~24%) sit on dead attributes**, plus a 54th outside the
+denominator (ControlsMapper.TargetRangeExponent, class-81 delta trigger, log:330-331). Breakdown:
+45/54 match watchers (38 ReportLeak on 19 subsystems — F6; 4 FireCountdownStarted — F18; 1
+Torso.MotionState — F16; 2 Entity.IncomingLock — F7, whose match=0 Stop fires once spuriously),
+5/29 scale watchers (2 CollisionSpeed, 1 DistanceToMissile, 1 UnstablePercentage, 1
+Torso.SpeedOfTorsoHorizontal), 3/23 trig watchers (UnstablePercentage, ReduceButton,
+SpeedOfTorsoHorizontal). Of the 9 ConfigureActivePress watchers, 7 are on the -1 pad and 2
+(Avionics, Myomers) bind real members reading the authored idle -1.
+
+Two dead mechanisms: the engine inert pad for unpublished names (`WATCHER.cpp:118-137`) and
+`Mech::attrPad`, a shared read-only-0 Scalar aliased by five Entity attrs (ptr 0E514DD4;
+`mech.cpp:708,730,736,738,740`). **All 118 state watchers bind real StateIndicators.** Liveness
+verified: LocalVelocity (120 trigger polls), FootStep (14 matchfires), GeneratorOn x4,
+Myomers.SpeedEffect, HeatSink.CurrentTemperature, PercentDone x5, WeaponState-driven sequences
+started 21/4/2 times. Entity.AnimationState's 17 authored trigger states produced zero fires
+(consistent with autodrive lacking falls/jumps — unverified, see F23).
+
+**Fix path:** publish missing attributes in owning subsystems' ATTRIBUTE_ENTRY tables (the proven
+AmmoState/GeneratorState pattern) and replace the five attrPad aliases with driven members. Keep
+`scratchpad/audio_coverage.py` as the regression check; include TargetRangeExponent in the
+worklist.
+
+<a name="f6"></a>
+#### F6. ReportLeak: the coolant-leak warning can never sound (High, CONFIRMED)
+
+All 19 subsystems that authored a ReportLeak Logical match-watcher pair (Condenser1-6,
+GeneratorA-D, Avionics, Myomers, PPC_1/2, ERMLaser_1-3, SRM6_1/2) bind ReportLeak to NULL -> the
+constant-zero pad. The 38 pad-bound match watchers (1->Start, 0->Stop of the looped leak-warning
+sequence 0E4ACE50 — 3-note pattern 16/19/23, tempo 160; log:343) can never fire Start; the 19
+match=0 halves each fire one spurious Stop at prime. No other authored path targets the sequence;
+its seqstart count is 0 for the whole session. **Largest single block of dead authored audio
+(38 of 54 match watchers).** The underlying condition already exists in the port (`heat.cpp:418`
+publishes CoolantMassLeakRate/coolantDraw for the LeakGauge).
+
+**Fix:** register ReportLeak on the subsystem attribute tables per the decomp's original binding
+(read the binary's subsystem attribute table for the member it pointed at — likely the
+leak-rate/leaking flag — rather than inventing a threshold).
+
+<a name="f7"></a>
+#### F7. Missile-lock alarm impossible (High, CONFIRMED)
+
+Entity.IncomingLock (matchcfg 1->Start / 0->Stop of looped beeper 0E4AC548, note 58; log:299,
+302-306) and Entity.DistanceToMissile (scalecfg ctlID=12 = **Tempo**, mapping distance 100..800 to
+tempo 600..10 — the beep accelerates as the missile closes; log:300-301) both bind to
+`Mech::attrPad` (read-only 0). The original backed these with real distinct members — **binary
+attribute table verified: IncomingLock @mech+0x3FC, DistanceToMissile @mech+0x400**, initialized
+in the mech reset (part_012.c:9446-9447) — a genuine regression, not dead content.
+
+**Fix:** real backing members driven by the missile/threat system: IncomingLock set while an
+inbound lock/launch on the player exists; DistanceToMissile = range to nearest inbound missile
+(far default when none). The authored watchers then reproduce the accelerating alarm unchanged.
+
+<a name="f5"></a>
+#### F5. FootStep is a contact LEVEL, not a clip-transition pulse (High, CONFIRMED)
+
+Direct disassembly of BTL4OPT.EXE (both functions fall in decomp-export gaps): inside the mech's
+per-frame performance, footStep@mech+0x394 = (rootJointTranslation.y <= *footStepThreshold) ? 1:0,
+where the threshold pointer is SequenceController+0x20 = &animation_data[2] — the ANI header
+word[2] that `JMOVER.cpp:1415` parses and nothing else reads — and the root joint is the gamedata
+"jointlocal" joint (mech+0x5C8). Evaluation is skipped (value retained) while the channel's anim
+state is 0/1. Present in both performance variants: master perf entry 0x4a9b5c (code
+@0x4a9e80-0x4a9eb6, leg channel) and alternate entry 0x4ab9d8 (@0x4aba86-0x4abab9, body channel).
+
+The port instead pulses footStep=1 for a fixed 150 ms on every locomotion clip TRANSITION
+(`mech2.cpp:265-270`, decay `mech4.cpp:5219-5230`) and its SequenceController never captures
+animation_data[2] (`seqctl.cpp:153` skips hdr[2]). Step sounds fire at clip boundaries with fixed
+width instead of authored root-height contact crossings — wrong counts for clips whose root Y
+crosses the threshold twice or never.
+
+**Fix:** in the port's authoritative per-frame path, while leg-channel gait state not in {0,1},
+set footStep from rootY vs *footStepThreshold (captured at SelectSequence from &hdr[2]); remove
+the 150 ms pulse/decay; replicate the state-0/1 value retention; re-export the two gap functions
+(0x4a9b5c, 0x4ab9d8) into the decomp.
+
+<a name="f16"></a>
+#### F16. Torso-twist servo whir entirely dead (Medium, CONFIRMED)
+
+Torso.SpeedOfTorsoHorizontal (scalecfg pitch -200..+200 cents over 0.5..0.9 + trigcfg start/stop
+at 0.25) and Torso.MotionState (matchcfg ==2 -> Start@1.5) bind NULL (log:289-297) because the
+reconstructed Torso publishes no attributes (`torso.cpp:143-144` default-constructs an empty
+AttributeIndex). TorsoTwistInt01/Ext01/Stop01 are unreachable; none played. **Correction:**
+hud.hpp:103's "id 7 -> @0x1E4" is the HUD class's own table (a HUD read-out), NOT a Torso member —
+on the binary Torso, +0x1E4 is currentElevation. Do not publish the yaw rate there.
+
+**Fix:** register SpeedOfTorsoHorizontal on Torso as |yaw rate| (binary backing member plausibly
+twistVelocity@0x1E8 or effTwistRate@0x244 — confirm the Torso attribute table in the decomp first)
+and MotionState as the torso motion enum (authored trigger value 2; meaning inferred [T4]).
+
+<a name="f17"></a>
+#### F17. Entity attrPad family: instability alarm, impact scaling, ReduceButton (Medium, CONFIRMED)
+
+Three authored Entity bindings alias the shared read-only attrPad while the binary bound each to a
+distinct live member (binary attr table @0x50bea0: UnstablePercentage->+0x3F0,
+CollisionSpeed->+0x4B4, ReduceButton->+0x340):
+
+1. **UnstablePercentage** — volume scale (0..1) and start trigger (thresh 0.01) both stuck; the
+   instability/gyro-stagger alarm never sounds. The driver is the mech+0x3F0 sway/overspeed
+   accumulator the port already flags as unreconstructed for the gyro — one model fixes both.
+2. **CollisionSpeed** — authored AttackVolume [0.9,1] and Brightness [0.7,1] over impact speed
+   [0,25] pinned at minimum; impacts play (live CollisionState) but never scale with how hard you
+   hit. (Original +0x4B4 writer not located in the export; intent rests on the authored scales +
+   distinct member.)
+3. **ReduceButton** — click-feedback trigger can never fire (whether the original cab drove it is
+   unverified; the dead binding is fact).
+
+**Fix:** real members: instability fraction from the 0x3F0 model; collisionSpeed = |impact
+velocity| stored when collisionTemporaryState goes 0->1 (`mech4.cpp:5332-5382` already has it);
+ReduceButton wired to the mapper like the Look* attrs.
+
+<a name="f15"></a>
+#### F15. ConfigureActivePress: weapon-configure ticker can never fire (Medium, CONFIRMED)
+
+Binary ground truth: ConfigureActivePress is a **MechSubsystem-BASE** attribute (id 2, descriptor
+@0x50de5c -> subsystem+0x110, registered by the MechSubsystem class stub @0x4acf10). Its only
+runtime driver is MechWeapon's ConfigureMappables handler @004b9550: **0 while the configure
+button is held, -1 on release** — a held-session flag, not a button index. The port misnames the
+correctly-driven weapon field `vitalSubsystemIndex` ("no confirmed reader" — the reader is the
+authored audio trigger watchers at thresh=-1), omits the attribute from the chain so every weapon
+binds the constant -1 pad (log:529-531), and appends undriven duplicates on Myomers/Sensor at
+invented offsets 0x358/0x328 (layout departure; behaviorally harmless).
+
+**Fix:** publish ConfigureActivePress at the MechSubsystem level bound to the existing +0x110
+field (rename vitalSubsystemIndex -> configureActivePress); drop or ignore the Myomers/Sensor
+duplicates.
+
+<a name="f18"></a>
+#### F18. FireCountdownStarted is the ammo COOK-OFF warning — and it's dead (Medium, PARTIAL, corrected)
+
+AmmoBinSRM6_1/2.FireCountdownStarted binds NULL -> pad (log:674-679, 721-726); its 4 authored
+start/stop match watchers can never fire. **Corrected identification:** the binary's AmmoBin
+attribute table (@0x512600) maps FireCountdownStarted -> AmmoBin+0x18C — the member the port
+already reconstructs as **`cookOffArmed`** (set when the heat alarm hits FAILURE, FUN_004bd394;
+armed via HandleMessage(1), FUN_004bdb94; cleared on CookOff/empty). It is the ammo-explosion
+countdown warning, NOT an SRM salvo launch cue — do not touch projweap.cpp.
+
+**Fix:** one Logical ATTRIBUTE_ENTRY on AmmoBin pointing at the existing cookOffArmed member.
+
+<a name="f19"></a>
+#### F19. Step-intensity invention fights a live authored feed (Medium, PARTIAL, corrected)
+
+The mech2.cpp foot-plant broadcast (`mech2.cpp:272-338`) is unauthored in its curve (speed/25 with
+a 0.55 floor) and delivery (patch-sniffing the footfall mixers directly, zeroing the sibling
+input). **The premise that the original feed was lost game code is wrong:** the authored stream
+wires LocalAcceleration -> ctl100 ([0,10]->[0,1]) and LocalVelocity -> ctl101 ([0,0.6]->[0,0.4])
+scale watchers into the authored splitter, and the ctl101 watcher **fires on every captured
+footstep** (log:1591, 2147, 2459, ...), zeroing the invention's just-written mixer input right
+after the FootStep matchfire — in log:1574-1598 this drops the footstep start entirely
+("[spatial] DROP transient start src=0E6BC948 vol=0").
+
+**Fix:** remove the game-code broadcast; make the port's published LocalVelocity/LocalAcceleration
+attributes carry the motion components the authored AudioMotionScale watchers extract (one
+currently reads 0 while linear speed is 30.7 in the same poll — the port publishes the wrong/flat
+component) and let the wholly-authored scale->splitter->mixer chain drive footfall volume and
+brightness.
+
+<a name="f20"></a>
+#### F20. Zoom blip: TargetRangeExponent unpublished (Low, UNVERIFIED-LOW)
+
+ControlsMapper.TargetRangeExponent binds NULL (log:330-331) so the authored AudioScalarDeltaTrigger
+(blip per zoom step) is dead — yet the live member exists and slews every frame
+(`btl4mppr.cpp:313-314, 391-407`). Pure bookkeeping: add the ATTRIBUTE_ENTRY (requires giving
+BTL4ControlsMapper its own AttributePointers[] chained to MechControlsMapper's index).
+
+<a name="f23"></a>
+#### F23. Benign-invention check (Low, UNVERIFIED-LOW)
+
+(1) FootStep 150 ms pulse fired the authored watcher fine in-session (superseded by F5 anyway).
+(2) **AnimationState numbering is the one worth closing:** none of the 17 authored trigger states
+{1,2,5,8-11,14-17,20-23,26,27} fired in 35 s of walking/turning; if the port's runtime clip
+numbering differs from the binary's AnimationState numbering, all 17 sounds are silently mis-keyed
+— diff the binary's state writer vs the port's clip ids, then force a fall/jump and confirm.
+(3) CollisionState is driven 0/1 while authored as 4-state (NoCollision/InitialHit/Slide/Rest) —
+nothing lost in THIS stream (listens on 1) but Slide/Rest scrape audio elsewhere would be dead.
+(4) Master listener gain 0.6 (env-tunable) is a uniform port knob; no relative distortion.
+
+---
+
+<a name="validations"></a>
+## 4. Validations and KB corrections (no fidelity gap)
+
+- **Patch numbering = wPreset (settled).** The original SetupPatch @00465ba8 sends the authored
+  patch_ID verbatim as a MIDI Program Change (+ CC0 bank, + CC121 reset); the SBK resolves program
+  N by wPreset. `tools/sf2extract.py` already keys on phdr wPreset. Live traces confirm (patch 83
+  -> ProgramButton01, patch 56 -> LaserLoaded01). **Any future tooling must key on wPreset, never
+  phdr record order** — bank1 has 38 presets where wPreset != file index. Record in
+  `context/decomp-reference.md`.
+- **Calibration rate origin (KB correction).** FUN_0044e19c is
+  ApplicationManager::GetFrameRate(); the original renderer rate was the system CLOCK TICK rate
+  (18.2065 Hz / 28 Hz), i.e. audio "frames" were clock ticks. The port's `btl4app.cpp:283-303`
+  DPLARG+0x10 read is garbage-with-a-clamp; 1000 (Windows ticks/ms) is structurally equivalent and
+  correct, but delete the bogus read and pass SystemClock::GetTicksPerSecond() with a comment.
+- **Published-velocity smoothing is faithful in kind.** Mech::Execute (FUN_004ab430) runs the
+  localVelocity components through AverageOf running-average filters (part_012.c:15169-15179);
+  annotate the port's smoothing with this evidence -> T1.
+
+---
+
+## 5. Recommended Fix Order
+
+### Quick wins (small, isolated, high leverage)
+
+1. **F3 distance:** `alDistanceModel(AL_NONE)` + un-comment the distance multiply + apply in
+   Static3D + drop AL_MAX_DISTANCE attenuation writes. Near one-line; also fixes cull, voice
+   steal, and ducking.
+2. **F4 volume curve:** square volume_scale at the three AL_GAIN sites.
+3. **F10 doppler:** alDopplerFactor(0); add GetDopplerCents() into the Dynamic3D pitch chain.
+4. **F15 ConfigureActivePress:** publish the base attribute on the existing +0x110 member.
+5. **F18 cook-off:** one ATTRIBUTE_ENTRY -> cookOffArmed.
+6. **F20 zoom blip:** one ATTRIBUTE_ENTRY -> targetRangeExponent.
+7. **KB hygiene:** record wPreset confirmation; fix the calibration-rate claim; delete the DPLARG
+   read.
+
+### Structural — bank regeneration (ship as one unit)
+
+8. **F1 + F2 + F13 + F14 extractor rewrite:** emit ALL zones (per-zone WAV, keyLo/keyHi, loop
+   points, pan, attenuation), bake per-zone tuning into each WAV's declared rate
+   (44100*2^(((60-effRoot)*100+tune)/1200)), extend SAMPLEINFO, key-range selection in
+   SetupPatch/PlayNote, AL_SOFT_loop_points (alBufferiv). **Loop regions must land with or before
+   multi-zone** (the MechExplosion 1.5% loop layer otherwise becomes a repeating-boom bug).
+   This one unit fixes most of the pitch and layering fidelity at once.
+9. **F13 release:** gain-ramp on Stop over the per-preset authored releaseVolEnv.
+
+### Structural — spatial/EFX
+
+10. **F9 filters:** EFX AL_FILTER_LOWPASS per source (brightness x distance HF rolloff per the
+    per-type decomp semantics).
+11. **F11 reverb:** one EAXReverb aux slot; 3D sources wet (0.3), Direct dry.
+12. **F12 placement:** AL_POSITION from the DirectPatch position enum; internal-spatialization
+    statics positioned from their computed azimuth. (F22 ITD/HRTF optional after.)
+
+### Structural — attribute reconstruction (decomp-guided, per finding)
+
+13. **F6 ReportLeak** (biggest dead block; read the binary's subsystem table for the member).
+14. **F7 IncomingLock/DistanceToMissile** (members @+0x3FC/+0x400; drive from the missile system).
+15. **F5 FootStep contact level** (+ re-export the two decomp gap functions).
+16. **F19 footstep feed:** publish correct motion components; delete the mech2.cpp broadcast.
+17. **F16 Torso attrs** (confirm the binary Torso table first), **F17 attrPad family**
+    (instability model @0x3F0, collisionSpeed, ReduceButton).
+18. **F23(2) AnimationState numbering audit**, then F21 attack velocity/time as polish.
+
+**Regression harness:** re-run the audit capture after each block and assert with
+`scratchpad/audio_coverage.py` that the dead-watcher count monotonically drops; A/B pitch/volume
+spot checks against the recovered-rate table for the bank regeneration.
diff --git a/engine/MUNGA/AUDCMP.cpp b/engine/MUNGA/AUDCMP.cpp
index 50224e0..9c2c3b9 100644
--- a/engine/MUNGA/AUDCMP.cpp
+++ b/engine/MUNGA/AUDCMP.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "munga.h"
 #pragma hdrstop
 
@@ -290,6 +291,11 @@ AudioControlSend::AudioControlSend(
 	MemoryStream_Read(stream, &control_ID);
 	MemoryStream_Read(stream, &control_value);
 
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_sd=0; if (s_sd++<80)
+		DEBUG_STREAM << "[sendcfg] tgt=" << (void*)audio_component
+			<< " ctl=" << (int)control_ID << "/" << control_value
+			<< " entity=" << (void*)entity << "\n" << std::flush; }
+
    Check(entity);
 	entity->AddAudioComponent(this);
 
@@ -472,6 +478,9 @@ void
 	while ((audio_component = iterator.ReadAndNext()) != NULL)
 	{
 		Check(audio_component);
+		if (getenv("BT_AUDIO_SPATIAL")) { static int s_sp2=0; if (s_sp2++<200)
+			DEBUG_STREAM << "[split] " << (void*)this << " -> tgt=" << (void*)audio_component
+				<< " ctl=" << (int)control_ID << "/" << control_value << "\n" << std::flush; }
 		audio_component->ReceiveControl(control_ID, control_value);
 	}
 }
@@ -631,6 +640,10 @@ void
       }
 
 		Check(audioComponentSocket.GetCurrent());
+		if (getenv("BT_AUDIO_SPATIAL")) { static int s_mix=0; if (s_mix++<80)
+			DEBUG_STREAM << "[mix] mixer=" << (void*)this << " -> tgt=" << (void*)audioComponentSocket.GetCurrent()
+				<< " outCtl=" << (int)outputControlID << " in[" << index << "]=" << control_value
+				<< " sum=" << mixed_value << "\n" << std::flush; }
       audioComponentSocket.GetCurrent()->ReceiveControl(
       	outputControlID,
          mixed_value
@@ -793,6 +806,9 @@ void
       }
 
 		Check(audioComponentSocket.GetCurrent());
+		if (getenv("BT_AUDIO_SPATIAL") && mult_value <= 0.0f) { static int s_mx=0; if (s_mx++<300)
+			DEBUG_STREAM << "[mult0] mult=" << (void*)this << " -> tgt=" << (void*)audioComponentSocket.GetCurrent()
+				<< " in[" << index << "]=" << control_value << " product=" << mult_value << "\n" << std::flush; }
       audioComponentSocket.GetCurrent()->ReceiveControl(
       	outputControlID,
          mult_value
@@ -840,6 +856,11 @@ AudioControlSmoother::AudioControlSmoother(
 	MemoryStream_Read(stream, &initial_fill_value);
 	audioControlAverage.SetSize(number_of_samples, initial_fill_value);
 
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_sm=0; if (s_sm++<40)
+		DEBUG_STREAM << "[smoothcfg] this=" << (void*)this << " ctlID=" << (int)control_ID
+			<< " samples=" << (int)number_of_samples << " fill=" << initial_fill_value
+			<< "\n" << std::flush; }
+
 	AudioControlSmootherX(
       audio_component,
       entity,
@@ -939,6 +960,14 @@ void
 	{
       audioControlAverage.Add(control_value);
 
+      if (getenv("BT_AUDIO_SPATIAL")) { static int s_sa=0;
+         if ((controlID == 100 || controlID == 101) && s_sa++ < 3000)
+            DEBUG_STREAM << "[smooth] t=" << (GetTickCount() % 1000000)
+               << " this=" << (void*)this << " ctl=" << (int)controlID
+               << " in=" << control_value
+               << " avg=" << audioControlAverage.CalculateOlympicAverage()
+               << "\n" << std::flush; }
+
       Check(audioComponentSocket.GetCurrent());
       audioComponentSocket.GetCurrent()->ReceiveControl(
          controlID,
@@ -1315,6 +1344,10 @@ void
 	nextSampleTime += sampleDuration;
 
 	Check(audioComponentSocket.GetCurrent());
+	if (getenv("BT_AUDIO_SPATIAL")) { static int s_sh=0; if (s_sh++<60)
+		DEBUG_STREAM << "[snh] this=" << (void*)this << " -> tgt=" << (void*)audioComponentSocket.GetCurrent()
+			<< " ctlID=" << (int)audioControlID << " val=" << currentValue
+			<< " range=[" << minValue << "," << maxValue << "]\n" << std::flush; }
 	audioComponentSocket.GetCurrent()->ReceiveControl(
 		audioControlID,
 		currentValue
diff --git a/engine/MUNGA/AUDCMP.h b/engine/MUNGA/AUDCMP.h
index 180aa68..3f6d98d 100644
--- a/engine/MUNGA/AUDCMP.h
+++ b/engine/MUNGA/AUDCMP.h
@@ -232,6 +232,12 @@ class AudioControlMixer:
 	public AudioComponent
 {
 public:
+	// DIAG/game-facing: expose the authored output control so game-side control
+	// broadcasts (the foot-plant intensity send) can target only volume/brightness
+	// mix stages and never Start-outputting stages.
+	AudioControlID GetOutputControlID() const { return outputControlID; }
+	AudioComponent *GetTargetComponent() { return audioComponentSocket.GetCurrent(); }
+
 	//
 	//--------------------------------------------------------------------
 	// Construction, Destruction, Testing
@@ -307,6 +313,12 @@ class AudioControlMultiplier:
 	public AudioComponent
 {
 public:
+	// DIAG/game-facing: expose the authored output control so game-side control
+	// broadcasts (the foot-plant intensity send) can target only volume/brightness
+	// mix stages and never Start-outputting stages.
+	AudioControlID GetOutputControlID() const { return outputControlID; }
+	AudioComponent *GetTargetComponent() { return audioComponentSocket.GetCurrent(); }
+
 	//
 	//--------------------------------------------------------------------
 	// Construction, Destruction, Testing
diff --git a/engine/MUNGA/AUDIO.cpp b/engine/MUNGA/AUDIO.cpp
index b017424..93aa768 100644
--- a/engine/MUNGA/AUDIO.cpp
+++ b/engine/MUNGA/AUDIO.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "munga.h"
 #pragma hdrstop
 
@@ -94,8 +95,15 @@ void
 	}
 	headEntitySocket.Add(entity);
 
-   alDistanceModel(AL_LINEAR_DISTANCE);
-   alDopplerFactor(0.3f);
+   // FIDELITY (AUDIO_FIDELITY.md F3/F10): the engine computes the AUTHORED
+   // distance-attenuation curve (AUDIO.INI amplitude_rolloff knee/exponent ->
+   // AudioLocation::distanceVolumeScale) and the authored doppler-cents model.
+   // Disable OpenAL's own models so they can't double-apply / fight them:
+   // AL_LINEAR_DISTANCE made far battle audio fade to zero on a straight line
+   // (-6 dB vs authored at 300u), and AL doppler ran with the wrong constants
+   // AND a sign-inverted velocity feed (approaching sources pitched DOWN).
+   alDistanceModel(AL_NONE);
+   alDopplerFactor(0.0f);
 
 	#if 0
 	//
@@ -131,8 +139,39 @@ void
 	//
 	// Increment frame counter
 	//
-	audioFrameCount = Now().ticks;
+	// AUDIO CLOCK CALIBRATION FIX: AudioTime consumers (sequence event timing,
+	// compression curves) assume audioFrameCount advances at the renderer's
+	// calibrationRate (DefaultRendererRate = 30 frames/sec:
+	// Seconds_To_Frames = s * rate).  The WinTesla port set raw Now().ticks here
+	// (~hundreds/sec), running sequences ~18x off the authored timing -- the
+	// AudioControlSequence events carrying the real footstep volumes never
+	// landed where authored.  Convert ticks -> calibrated frames properly.
+	{
+		double tps = (double)SystemClock::GetTicksPerSecond();
+		if (tps <= 0.0) tps = 1000.0;	// GetTickCount ms fallback (static not yet measured)
+		audioFrameCount = (AudioFrameCount)(
+			(double)Now().ticks
+			* (double)application->GetAudioRenderer()->GetCalibrationRate()
+			/ tps);
+	}
 	Verify(audioFrameCount < LONG_MAX);
+	if (getenv("BT_AUDIO_SPATIAL")) { static long s_hx=0; if ((++s_hx % 300)==0)
+		DEBUG_STREAM << "[audioclock] frame=" << audioFrameCount << " execs=" << s_hx << "\n" << std::flush; }
+
+	// (task #50, AUDIO_FIDELITY F13) service the authored release fades
+	// registered by PatchLevelOfDetail::StopNote (dB-linear note-off ramps).
+	{
+		extern void PRESET_serviceReleaseFades(float elapsed_seconds);
+		static long s_lastFadeTicks = 0;
+		long now_ticks = Now().ticks;
+		if (s_lastFadeTicks != 0 && now_ticks > s_lastFadeTicks)
+		{
+			double tps = (double)SystemClock::GetTicksPerSecond();
+			if (tps <= 0.0) tps = 1000.0;
+			PRESET_serviceReleaseFades((float)((now_ticks - s_lastFadeTicks) / tps));
+		}
+		s_lastFadeTicks = now_ticks;
+	}
 
    //set current listener orientation
    Vector3D headVelocity;
@@ -140,6 +179,32 @@ void
    headVelocity.MultiplyByInverse(this->GetHeadEntity()->GetWorldLinearVelocity(), this->GetHeadEntity()->localToWorld);
    alListener3f(AL_VELOCITY, -headVelocity.x, -headVelocity.y, -headVelocity.z);
 
+	// LIVE-PLAYING DUMP (BT_AUDIO_DUMP): once a second list every playing AL
+	// source with its sample name / gain / pitch / loop -- catches "mystery
+	// sounds" (wrong sample, wrong pitch, chopped) red-handed.
+	if (getenv("BT_AUDIO_DUMP")) {
+		static long s_dumpTick = 0;
+		if ((++s_dumpTick % 45) == 0) {
+			extern ALuint *g_buffers; extern int g_numBuffers; extern const char *g_bufferNames[512];
+			for (ALuint sid = 1; sid <= 40; ++sid) {
+				if (!alIsSource(sid)) continue;
+				ALint st = 0; alGetSourcei(sid, AL_SOURCE_STATE, &st);
+				if (st != AL_PLAYING) continue;
+				ALint buf = 0, looping = 0; ALfloat gain = 0, pitch = 0;
+				alGetSourcei(sid, AL_BUFFER, &buf);
+				alGetSourcei(sid, AL_LOOPING, &looping);
+				alGetSourcef(sid, AL_GAIN, &gain);
+				alGetSourcef(sid, AL_PITCH, &pitch);
+				const char *nm = "?";
+				for (int b = 0; b < g_numBuffers && b < 512; ++b)
+					if ((ALint)g_buffers[b] == buf) { nm = g_bufferNames[b] ? g_bufferNames[b] : "?"; break; }
+				DEBUG_STREAM << "[playing] src=" << sid << " " << nm
+					<< " gain=" << gain << " pitch=" << pitch
+					<< " loop=" << looping << "\n" << std::flush;
+			}
+		}
+	}
+
 	#if 0
 	//
 	// Get the entity
@@ -398,6 +463,29 @@ void
 	}
 }
 
+//
+//#############################################################################
+//#############################################################################
+//
+void
+	AudioComponent::PrimeWatchers(int passes)
+{
+	Check(this);
+	for (int pass = 0; pass < passes; ++pass)
+	{
+		ChainIteratorOf<Component*> iterator(&audioWatcherSocket);
+		Component *component;
+		while ((component = iterator.ReadAndNext()) != NULL)
+		{
+			Check(component);
+			// recurse gate-free: an AudioComponent child (mixer/smoother/
+			// splitter) pumps ITS chain; an attribute watcher re-reads +
+			// re-sends.  One pass per level keeps total work = passes x chain.
+			component->PrimeWatchers(1);
+		}
+	}
+}
+
 //
 //#############################################################################
 //#############################################################################
diff --git a/engine/MUNGA/AUDIO.h b/engine/MUNGA/AUDIO.h
index bd74762..9f95c5d 100644
--- a/engine/MUNGA/AUDIO.h
+++ b/engine/MUNGA/AUDIO.h
@@ -454,6 +454,14 @@ public:
 	void
 		ExecuteWatchers();
 
+	// (task #50, AUDIO_FIDELITY F19) gate-free watcher pump for the transient
+	// cold-start prime: ExecuteWatchers above is frame-gated
+	// (DefaultAudioFrameDelay), so N calls in one tick collapse to one.
+	// Recurses through the watcher CHAIN (source <- mixer <- smoother <-
+	// scale), each hop gate-free.
+	virtual void
+		PrimeWatchers(int passes);
+
 	void
 		Execute();
 
diff --git a/engine/MUNGA/AUDLVL.h b/engine/MUNGA/AUDLVL.h
index 8312df0..8ca6f9d 100644
--- a/engine/MUNGA/AUDLVL.h
+++ b/engine/MUNGA/AUDLVL.h
@@ -162,6 +162,11 @@ protected:
 	AudioLevelOfDetail*
 		GetAudioLevelOfDetail();
 
+public:
+	// (task #50) public read of the active LOD -- the game-side footstep
+	// intensity send identifies footstep sources by their patch bank/id.
+	AudioLevelOfDetail* PeekAudioLevelOfDetail() { return GetAudioLevelOfDetail(); }
+
 private:
 	//
 	//-----------------------------------------------------------------------
diff --git a/engine/MUNGA/AUDREND.cpp b/engine/MUNGA/AUDREND.cpp
index 2a2420f..ea5fb94 100644
--- a/engine/MUNGA/AUDREND.cpp
+++ b/engine/MUNGA/AUDREND.cpp
@@ -174,6 +174,10 @@ void
 		
 	if (audio_source->IsAudioSourceClipped(GetAudioHead()))
 	{
+		if (getenv("BT_AUDIO_SPATIAL")) { static int s_cl=0; if (s_cl++<40)
+			DEBUG_STREAM << "[spatial] CLIPPED src=" << (void*)audio_source
+				<< " headPos=(" << GetAudioHead()->GetHeadEntity()->localOrigin.linearPosition.x
+				<< "," << GetAudioHead()->GetHeadEntity()->localOrigin.linearPosition.z << ")\n" << std::flush; }
 		//
 		// If it is a transient source then ignore request
 		//
@@ -181,7 +185,7 @@ void
 		{
 			#ifdef LAB_ONLY
 				sourceClippedCount++;
-			#endif		
+			#endif
 			return;
 		}
 		audio_source_priority = audio_source->GetAudioSourcePriority();
@@ -190,7 +194,25 @@ void
 	else
 	{
 		audio_source_priority = audio_source->GetAudioSourcePriority();
+		// (task #50, AUDIO_FIDELITY F19) COLD-START PRIME: an idle source's own
+		// watcher socket only executes at Start attempts, so its authored
+		// AudioControlSmoothers (footstep volume: N=30/15, fill 0) warmed ONE
+		// sample per attempt -- and the transient drop gate below (vol < 0.3)
+		// rejected the first ~25 footfalls (~10-20 s of silent steps) before
+		// the average could cross the gate.  On a Start request, pump the
+		// source's watchers a full smoother window so the volume chain is
+		// evaluated at its true steady state; the smoother keeps its authored
+		// smoothing role for live variation once the source is playing.
+		if (message->controlID == StartAudioControlID)
+		{
+			audio_source->PrimeWatchers(30);
+		}
 		audio_source_volume_scale = audio_source->CalculateSourceVolumeScale();
+		if (getenv("BT_AUDIO_SPATIAL")) { static int s_vs=0; if ((s_vs++ % 120)==0)
+			DEBUG_STREAM << "[spatial] request src=" << (void*)audio_source
+				<< " vol=" << audio_source_volume_scale
+				<< " headPos=(" << GetAudioHead()->GetHeadEntity()->localOrigin.linearPosition.x
+				<< "," << GetAudioHead()->GetHeadEntity()->localOrigin.linearPosition.z << ")\n" << std::flush; }
 	}
 	
 	//
@@ -199,17 +221,38 @@ void
 	// Then return
 	//--------------------------------------------------------------------------
 	//
+	// DIAG (BT_AUDIO_NODROP): deliver low-volume transient starts anyway (at a
+	// floor volume) to isolate volume-feed problems from the rest of the chain.
+	if (getenv("BT_AUDIO_NODROP") &&
+		message->controlID == StartAudioControlID &&
+		audio_source->GetAudioRenderType() == TransientAudioRenderType &&
+		audio_source_volume_scale < LowAudioVolumeThreshold)
+	{
+		DEBUG_STREAM << "[spatial] NODROP forcing start src=" << (void*)audio_source
+			<< " vol=" << audio_source_volume_scale << "\n" << std::flush;
+		audio_source->ReceiveControl(VolumeAudioControlID, 0.7f);
+		audio_source_volume_scale = 0.7f;
+	}
 	if (
 		message->controlID == StartAudioControlID &&
 		audio_source->GetAudioRenderType() == TransientAudioRenderType &&
 		audio_source_volume_scale < LowAudioVolumeThreshold
 	)
 	{
+		if (getenv("BT_AUDIO_SPATIAL")) { static int s_dr=0; if (s_dr++<40)
+			DEBUG_STREAM << "[spatial] DROP transient start t=" << (GetTickCount() % 1000000)
+				<< " src=" << (void*)audio_source
+				<< " vol=" << audio_source_volume_scale
+				<< " (below threshold " << LowAudioVolumeThreshold << ")\n" << std::flush; }
 		#ifdef LAB_ONLY
 			sourceClippedCount++;
-		#endif		
+		#endif
 		return;
 	}
+	if (getenv("BT_AUDIO_SPATIAL") && message->controlID == StartAudioControlID) {
+		static int s_st=0; if (s_st++<40)
+			DEBUG_STREAM << "[spatial] START request src=" << (void*)audio_source
+				<< " vol=" << audio_source_volume_scale << "\n" << std::flush; }
 	
 	//
 	//--------------------------------------------------------------------------
diff --git a/engine/MUNGA/AUDSEQ.cpp b/engine/MUNGA/AUDSEQ.cpp
index 24a6d73..9f83104 100644
--- a/engine/MUNGA/AUDSEQ.cpp
+++ b/engine/MUNGA/AUDSEQ.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "munga.h"
 #pragma hdrstop
 
@@ -67,6 +68,9 @@ void
 {
 	Check(this);
 	Check(audio_component);
+	if (getenv("BT_AUDIO_SPATIAL")) { static int s_ev=0; if (s_ev++<200)
+		DEBUG_STREAM << "[seqev] tgt=" << (void*)audio_component
+			<< " ctl=" << (int)audioControlID << "/" << audioControlValue << "\n" << std::flush; }
 	audio_component->ReceiveControl(audioControlID, audioControlValue);
 }
 
@@ -189,6 +193,16 @@ AudioControlSequence::AudioControlSequence(
 		audioControlEventSocket.Add(audio_control_event);
 	}
 
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_sq=0; if (s_sq++<60) {
+		DEBUG_STREAM << "[seqcfg] seq=" << (void*)this << " tgt=" << (void*)audio_component
+			<< " looped=" << (int)is_looped << " div=" << (int)divisions_per_beat
+			<< " tempo=" << (int)tempo << " events=" << (int)number_of_control_events << " ";
+		{ SChainIteratorOf<AudioControlEvent*> it(&audioControlEventSocket);
+		  AudioControlEvent *e; int n=0;
+		  while ((e = it.ReadAndNext()) != NULL && n++ < 24)
+			DEBUG_STREAM << *e; }
+		DEBUG_STREAM << "\n" << std::flush; } }
+
 	AudioControlSequenceX(
 		audio_component,
 		entity,
@@ -378,6 +392,9 @@ Logical
 void
 	AudioControlSequence::StartSequence()
 {
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_ss=0; if (s_ss++<40)
+		DEBUG_STREAM << "[seqstart] seq=" << (void*)this << "\n" << std::flush; }
+
 	Check(this);
 
 	//
diff --git a/engine/MUNGA/AUDSRC.cpp b/engine/MUNGA/AUDSRC.cpp
index 486e3c2..765a4f2 100644
--- a/engine/MUNGA/AUDSRC.cpp
+++ b/engine/MUNGA/AUDSRC.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "munga.h"
 #pragma hdrstop
 
@@ -416,6 +417,12 @@ AudioControlValue
 		volume_scale;
 		
 	volume_scale = volumeScale * volumeMixScale * volumeCompressionScale;
+	if (getenv("BT_AUDIO_SPATIAL") && volume_scale <= 0.0f) {
+		static int s_z=0; if (s_z++<40)
+			DEBUG_STREAM << "[spatial] vol=0 breakdown src=" << (void*)this
+				<< " volumeScale=" << volumeScale
+				<< " mixScale=" << volumeMixScale
+				<< " compression=" << volumeCompressionScale << "\n" << std::flush; }
 	Clamp(volume_scale, MinAudioVolume, MaxAudioVolume);
 	return volume_scale;
 }
@@ -656,6 +663,8 @@ void
 	Check(this);
 	Clamp(control_value, MinAudioVolume, MaxAudioVolume);
 	volumeScale = control_value / (MaxAudioVolume - MinAudioVolume);
+	if (getenv("BT_AUDIO_SPATIAL")) { static int s_vh=0; if (s_vh++<300)
+		DEBUG_STREAM << "[volset] src=" << (void*)this << " vol=" << volumeScale << "\n" << std::flush; }
 }
 
 //
diff --git a/engine/MUNGA/AUDWTHR.cpp b/engine/MUNGA/AUDWTHR.cpp
index b360b91..2f4fcb6 100644
--- a/engine/MUNGA/AUDWTHR.cpp
+++ b/engine/MUNGA/AUDWTHR.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "munga.h"
 #pragma hdrstop
 
@@ -134,6 +135,12 @@ AudioMotionTrigger::AudioMotionTrigger(
 	MemoryStream_Read(stream, &motionType);
 	MemoryStream_Read(stream, &motionValue);
 
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_mt=0; if (s_mt++<40)
+		DEBUG_STREAM << "[motiontrigcfg] attrPtr=" << (void*)attributePointer
+			<< " motionType=" << (int)motionType << " (0=linear,1=angular)"
+			<< " motionValue=" << (int)motionValue << " (0=X,1=Y,2=Z,3=len)"
+			<< "\n" << std::flush; }
+
 	PrimeWatcher();
 }
 
@@ -283,6 +290,12 @@ AudioMotionScale::AudioMotionScale(
 	MemoryStream_Read(stream, &motionType);
 	MemoryStream_Read(stream, &motionValue);
 
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_ms=0; if (s_ms++<40)
+		DEBUG_STREAM << "[motionscalecfg] attrPtr=" << (void*)attributePointer
+			<< " motionType=" << (int)motionType << " (0=linear,1=angular)"
+			<< " motionValue=" << (int)motionValue << " (0=X,1=Y,2=Z,3=len)"
+			<< "\n" << std::flush; }
+
 	PrimeWatcher();
 }
 
@@ -873,6 +886,31 @@ AudioStateWatcher::AudioStateWatcher(
 	AudioWatcherOf<StateIndicator>(stream, entity)
 {
 	Check_Pointer(attributePointer);
+	// BRING-UP GUARD [T3, temporary]: an AudioStateWatcher binds to a StateIndicator
+	// attribute BY NAME.  The Mech's own state indicators (SimulationState, Animation/
+	// ReplicantAnimationState, CollisionState) are real; but audio also binds state
+	// attrs on subsystems that are not fully reconstructed yet (GeneratorState,
+	// CondenserState, Torso MotionState, ...).  Those resolve to an unconstructed
+	// object -- a null/garbage vtable at +0 or a debug-fill (0xCDCDCDCD) watcher chain
+	// at +0x18 -- and AddAudioWatcher would AV in SChainOf::Add.  Skip the register
+	// (that subsystem's state audio stays silent) until the subsystem is built; this
+	// is SELF-CLEARING (a real StateIndicator passes).  See docs: audio subsystem wave.
+	// Validate the AUDIO SOCKET at +0x18 (what AddAudioWatcher touches), NOT the
+	// object's +0 vtable: a real StateIndicator has a vtable at +0, but the binary's
+	// 0x54 subsystem alarm (GaugeAlarm54) is non-polymorphic there (a raw header) yet
+	// has a real, constructed SChainOf socket at +0x18.  A skip means the socket is
+	// unconstructed (null / debug-fill 0xCDCDCDCD) -- the inert pad or a subsystem not
+	// yet reconstructed.  Registering there would AV in SChainOf::Add.
+	{
+		unsigned chain = *(unsigned*)((char*)attributePointer + 0x18);
+		if (chain == 0 || chain == 0xCDCDCDCD)
+		{
+			if (getenv("BT_AUDIO_LOG"))
+				DEBUG_STREAM << "[audiostate] skip watcher on unbuilt StateIndicator "
+					<< attributePointer << " (chain=" << (void*)chain << ")\n" << std::flush;
+			return;
+		}
+	}
    Cast_Object(StateIndicator*, attributePointer)->AddAudioWatcher(this);
 }
 
@@ -936,6 +974,14 @@ AudioStateTrigger::AudioStateTrigger(
 	MemoryStream_Read(stream, &excludeTransition);
 	MemoryStream_Read(stream, &excludeState);
 
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_stc=0; if (s_stc++<120)
+		DEBUG_STREAM << "[statecfg] attrPtr=" << (void*)attributePointer
+			<< " comp=" << (void*)audioComponentSocket.GetCurrent()
+			<< " trigState=" << triggerState << " inv=" << (int)inverseTrigger
+			<< " ctl=" << (int)controlID << "/" << controlValue
+			<< " excl=" << (int)excludeTransition << "/" << excludeState
+			<< "\n" << std::flush; }
+
 	PrimeWatcher();
 }
 
diff --git a/engine/MUNGA/AUDWTHR.h b/engine/MUNGA/AUDWTHR.h
index 0ed3634..52555ab 100644
--- a/engine/MUNGA/AUDWTHR.h
+++ b/engine/MUNGA/AUDWTHR.h
@@ -1,4 +1,5 @@
 #pragma once
+#include <cstdlib>
 
 #include "watcher.h"
 #include "audio.h"
@@ -304,6 +305,14 @@ template <class T>
 	MemoryStream_Read(stream, &controlValueOff);
 
 	triggerOn = False;
+
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_tc=0; if (s_tc++<80)
+		DEBUG_STREAM << "[trigcfg] attrPtr=" << (void*)attributePointer << " comp=" << (void*)audioComponentSocket.GetCurrent()
+			<< " thresh=" << attributeValueThreshold
+			<< " inverse=" << (int)inverseTrigger
+			<< " onID=" << (int)controlIDOn << "/" << controlValueOn
+			<< " offID=" << (int)controlIDOff << "/" << controlValueOff
+			<< "\n" << std::flush; }
 }
 
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -357,6 +366,10 @@ template <class T> void
 	Check_Pointer(attribute_ptr);
 	Scalar current_value = ExtractInterestingValue(attribute_ptr);
 
+	if (getenv("BT_AUDIO_SPATIAL") && current_value > 0.0f) { static int s_tg=0; if (s_tg++<120)
+		DEBUG_STREAM << "[trigger] attrPtr=" << (void*)attributePointer
+			<< " val=" << current_value << " thresh=" << attributeValueThreshold
+			<< " armed=" << (int)!triggerOn << "\n" << std::flush; }
 	if (triggerOn)
 	{
 		if (
@@ -432,6 +445,30 @@ public:
 	);
 	~AudioScaleOf();
 
+	//
+	//--------------------------------------------------------------------
+	// Execute -- scales send EVERY poll (task #50, AUDIO_FIDELITY F19).
+	//
+	// The base watcher gate is a BITWISE compare (Motion::operator== is
+	// memcmp) that existed to skip truly static values.  In the original,
+	// scale-watched attributes (velocities, accelerations, temperatures)
+	// were noisy physics floats that practically changed every poll, so
+	// scales streamed per-poll values into their authored consumers -- the
+	// footstep AudioControlSmoothers (N=30/15, fill 0) are SIZED for that
+	// cadence.  Our reconstruction's math can be deterministic (the gait
+	// integrator lands on bit-identical derived values during smooth
+	// acceleration), which froze the gate and starved the smoothers (the
+	// 10-20 s footstep warm-up).  Sending unconditionally restores the
+	// original's practical behavior; triggers/matchers keep the change
+	// gate (their semantics are edge-based).
+	//--------------------------------------------------------------------
+	//
+	void
+		Execute()
+		{
+			GrabCurrentValue();
+		}
+
 	//
 	//--------------------------------------------------------------------
 	// BuildFromPage
@@ -508,6 +545,13 @@ template <class T>
 	MemoryStream_Read(stream, &controlValueBoundary1);
 	MemoryStream_Read(stream, &controlValueBoundary2);
 	MemoryStream_Read(stream, &exponent);
+
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_scf=0; if (s_scf++<160)
+		DEBUG_STREAM << "[scalecfg] attrPtr=" << (void*)attributePointer
+			<< " comp=" << (void*)audioComponentSocket.GetCurrent()
+			<< " ctlID=" << (int)controlID
+			<< " aB=[" << attributeValueBoundary1 << "," << attributeValueBoundary2 << "]"
+			<< " cB=[" << controlValueBoundary1 << "," << controlValueBoundary2 << "]\n" << std::flush; }
 }
 
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -625,6 +669,16 @@ template <class T> void
 
 	Check(&audioComponentSocket);
 	Check(audioComponentSocket.GetCurrent());
+	if (getenv("BT_AUDIO_SPATIAL") && control_value <= 0.0f) {
+		static int s_sc=0; if (s_sc++<400)
+			DEBUG_STREAM << "[spatial] scale->0 attrPtr=" << (void*)attributePointer << " comp=" << (void*)audioComponentSocket.GetCurrent() << " raw=" << current_value << " ctlID=" << (int)controlID << " ctl=" << control_value << " aB=[" << attributeValueBoundary1 << "," << attributeValueBoundary2 << "]" << " cB=[" << controlValueBoundary1 << "," << controlValueBoundary2 << "]\n" << std::flush; }
+	if (getenv("BT_AUDIO_SPATIAL") && (controlID == 100 || controlID == 101)) {
+		static int s_fs2=0; if (s_fs2++<2000)
+			DEBUG_STREAM << "[fsscale] t=" << (GetTickCount() % 1000000)
+				<< " attrPtr=" << (void*)attributePointer
+				<< " comp=" << (void*)audioComponentSocket.GetCurrent()
+				<< " ctl" << (int)controlID << " raw=" << current_value
+				<< " out=" << control_value << "\n" << std::flush; }
 	audioComponentSocket.GetCurrent()->ReceiveControl(
 		controlID,
 		control_value
@@ -721,6 +775,12 @@ template <class T>
 	MemoryStream_Read(stream, &attributeMatchValue);
 	MemoryStream_Read(stream, &controlID);
 	MemoryStream_Read(stream, &controlValue);
+
+	if (getenv("BT_ATTRBIND_LOG")) { static int s_mc=0; if (s_mc++<80)
+		DEBUG_STREAM << "[matchcfg] attrPtr=" << (void*)attributePointer
+			<< " match=" << attributeMatchValue
+			<< " ctlID=" << (int)controlID << " ctlVal=" << controlValue
+			<< "\n" << std::flush; }
 }
 
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -767,6 +827,10 @@ template <class T> void
 
 	if (current_value == attributeMatchValue)
 	{
+		if (getenv("BT_AUDIO_SPATIAL")) { static int s_mf=0; if (s_mf++<40)
+			DEBUG_STREAM << "[matchfire] attrPtr=" << (void*)attributePointer << " comp=" << (void*)audioComponentSocket.GetCurrent() << " compClass=" << (int)audioComponentSocket.GetCurrent()->GetClassID()
+				<< " val=" << current_value << " -> ctl " << (int)controlID
+				<< "/" << controlValue << "\n" << std::flush; }
 		Check(&audioComponentSocket);
 		Check(audioComponentSocket.GetCurrent());
 		#if 1
diff --git a/engine/MUNGA/CMPNNT.h b/engine/MUNGA/CMPNNT.h
index e760bd1..b475e4c 100644
--- a/engine/MUNGA/CMPNNT.h
+++ b/engine/MUNGA/CMPNNT.h
@@ -11,6 +11,17 @@ public:
 
 	virtual void Execute();
 
+	// (task #50, AUDIO_FIDELITY F19) gate-free watcher pump for the audio
+	// transient cold-start prime.  Default: run Execute() N times (attribute
+	// watchers re-read + re-send each pass).  AudioComponent overrides it to
+	// RECURSE through its watcher chain, bypassing the per-component
+	// audio-frame gate that otherwise collapses the passes to one.
+	virtual void PrimeWatchers(int passes)
+	{
+		for (int pass = 0; pass < passes; ++pass)
+			Execute();
+	}
+
 	static Derivation *GetClassDerivations();
 	static SharedData DefaultData;
 
diff --git a/engine/MUNGA/MOVER.cpp b/engine/MUNGA/MOVER.cpp
index cb1a062..67eaaef 100644
--- a/engine/MUNGA/MOVER.cpp
+++ b/engine/MUNGA/MOVER.cpp
@@ -11,6 +11,34 @@
 #include "line.h"
 #include "app.h"
 #include "notation.h"
+#include <math.h>
+
+//
+// EXACT axis-angle rotation composition -- matches the 1995 BT binary's angular
+// integrator (FUN_00409f58): build a unit rotation quaternion from the rotation
+// VECTOR `rotVec` (angle = |rotVec|, axis = rotVec/angle) as { axis*sin(angle/2),
+// cos(angle/2) } and Hamilton-multiply it onto `base`.  The dead-reckoner previously
+// did `out.Add(base, rotVec)` -- adding a scaled angular-velocity vector to the heading
+// quaternion.  That is only a small-angle approximation: fine per-frame (tiny angle),
+// but over a long replicant dead-reckon gap it DIVERGES (the heading drifts to ~180deg
+// then snaps -- the spinning-peer hesitation).  This composition is exact for any angle
+// and stays on the unit sphere.
+//
+static void ExactAngularProject(Quaternion &out, const Quaternion &base, const Vector3D &rotVec)
+{
+	const Scalar ang = rotVec.Length();
+	if (ang > 1.0e-6f)
+	{
+		const Scalar h = 0.5f * (Scalar)fmodf((float)ang, 6.2831853f);	// half of angle mod 2pi
+		const Scalar s = (Scalar)(sinf((float)h) / ang);				// sin(angle/2)/angle
+		const Quaternion dq(rotVec.x * s, rotVec.y * s, rotVec.z * s, (Scalar)cosf((float)h));
+		out.Multiply(base, dq);											// base (X) dq
+	}
+	else
+	{
+		out = base;
+	}
+}
 
 //#############################################################################
 //###############################    Mover    #################################
@@ -395,10 +423,8 @@ Logical
 	//-------------------------------
 	//
 	position_delta.Multiply(updateVelocity.angularMotion, time_slice);
-	projectedOrigin.angularPosition.Add(
-		updateOrigin.angularPosition,
-		position_delta
-	);
+	ExactAngularProject(projectedOrigin.angularPosition,	// was .Add (diverging vector-add)
+		updateOrigin.angularPosition, position_delta);
 	projectedVelocity = updateVelocity;
 
    Check_Fpu();
@@ -460,10 +486,8 @@ Logical
 		updateVelocity.angularMotion,
 		time_slice
 	);
-	projectedOrigin.angularPosition.Add(
-		updateOrigin.angularPosition,
-		position_delta
-	);
+	ExactAngularProject(projectedOrigin.angularPosition,	// was .Add (diverging vector-add)
+		updateOrigin.angularPosition, position_delta);
 
 	//
 	//-----------------------------------
@@ -1113,6 +1137,34 @@ BoxedSolid*
 	return solid;
 }
 
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// The "static world" tail of FindBoxedSolidHitBy on its own: ray-test ONLY the
+// zone's static solid tree (world structures -- garages, walls, props), NOT the
+// tangible movers/doors.  Same tree the mech's walk collides against, so a shot
+// designated through this lands on exactly the geometry that blocks the mech.
+// FindBoundingBoxHitBy clips line->length to the hit distance (HitByBounded ->
+// line->length = enter), so the caller reads the entry point via line->FindEnd.
+//
+BoxedSolid*
+	Mover::FindStaticSolidHitBy(
+		Line *line
+	)
+{
+	Check(this);
+	Check(line);
+
+	InterestManager *interest_mgr = application->GetInterestManager();
+	Check(interest_mgr);
+	InterestZone *zone = interest_mgr->GetInterestZone(interestZoneID);
+	Check(zone);
+	BoxedSolidTree* tree = zone->GetCollisionRoot();
+	Check(tree);
+	BoxedSolid *result = (BoxedSolid*)tree->FindBoundingBoxHitBy(line);
+	Check_Fpu();
+	return result;
+}
+
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 //
 BoxedSolidCollisionList*
diff --git a/engine/MUNGA/MOVER.h b/engine/MUNGA/MOVER.h
index 5dffe01..314b0b3 100644
--- a/engine/MUNGA/MOVER.h
+++ b/engine/MUNGA/MOVER.h
@@ -300,6 +300,16 @@ public:
 			Line *line,
 			Entity *except_by
 		);
+	// STATIC-WORLD-ONLY ray query: the "test against the static world" tail of
+	// FindBoxedSolidHitBy factored out -- ray-tests ONLY the zone's static solid
+	// tree (the world structures: garages, walls, props), skipping the tangible
+	// movers/doors.  Used by the weapon boresight pick so a shot lands on the SAME
+	// static geometry that already blocks the mech's walk (mechs are picked
+	// separately, with their damage zones/lock).  Clips line->length to the entry.
+	BoxedSolid*
+		FindStaticSolidHitBy(
+			Line *line
+		);
 	BoxedSolidCollisionList*
 		CollideCenterOfMotion(
 			Line *line,
diff --git a/engine/MUNGA/SIMULATE.cpp b/engine/MUNGA/SIMULATE.cpp
index 33fe5c7..0d7d1ef 100644
--- a/engine/MUNGA/SIMULATE.cpp
+++ b/engine/MUNGA/SIMULATE.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "munga.h"
 #pragma hdrstop
 
@@ -486,6 +487,14 @@ void
 //#############################################################################
 // Watcher Support
 //
+int
+	Simulation::DebugAudioWatcherCount()
+{
+	SChainIteratorOf<Component*> iterator(audioWatcherSocket);
+	return (int)iterator.GetSize();
+}
+
+
 void
 	Simulation::ExecuteWatchers()
 {
@@ -496,6 +505,8 @@ void
 	// Audio
 	{
 		SChainIteratorOf<Component*> iterator(audioWatcherSocket);
+		if (getenv("BT_AUDIO_SPATIAL")) { static int s_ec=0; if ((s_ec++ % 600)==0)
+			DEBUG_STREAM << "[watchpoll] sim=" << (void*)this << " audioSocket size=" << iterator.GetSize() << "\n" << std::flush; }
 		while ((watcher = iterator.ReadAndNext()) != NULL)
 		{
 			watcher->Execute();
diff --git a/engine/MUNGA/SIMULATE.h b/engine/MUNGA/SIMULATE.h
index ab8acf5..314fcdf 100644
--- a/engine/MUNGA/SIMULATE.h
+++ b/engine/MUNGA/SIMULATE.h
@@ -247,6 +247,9 @@ public:
 	void
 		ExecuteWatchers();
 
+	int		// DEBUG (BT_AUDIO_LOG): how many audio watchers are registered on this sim
+		DebugAudioWatcherCount();
+
 private:
 	SChainOf<Component*>
 		audioWatcherSocket;
diff --git a/engine/MUNGA/WATCHER.cpp b/engine/MUNGA/WATCHER.cpp
index 45f0b32..fd0227d 100644
--- a/engine/MUNGA/WATCHER.cpp
+++ b/engine/MUNGA/WATCHER.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "munga.h"
 #pragma hdrstop
 
@@ -95,21 +96,45 @@ AttributeWatcher::AttributeWatcher(
 
 	attributePointer = simulation->GetAttributePointer(attribute_name);
 
-	#if DEBUG_LEVEL>0
-		if (attributePointer == NULL)
-		{
-			Dump(attribute_name);
-		}
-	#else
-		if (attributePointer == NULL)
-		{
-			DEBUG_STREAM <<
-				"AttributeWatcher::AttributeWatcher - attribute " <<
-				attribute_name <<
-				"\n";
-			Fail("AttributeWatcher::AttributeWatcher - attribute not found\n");
-		}
-	#endif
+	if (getenv("BT_ATTRBIND_LOG"))
+	{
+		extern int g_curAudioWatcherClass;
+		DEBUG_STREAM << "[attrbind] class=" << g_curAudioWatcherClass
+			<< " subsys=[" << subsystem_name
+			<< "] attr=[" << attribute_name << "] -> ptr=" << attributePointer
+			<< " vtbl=" << (attributePointer ? *(void**)attributePointer : (void*)0)
+			<< "\n" << std::flush;
+	}
+
+	// BRING-UP GUARD [T3, temporary]: audio references attributes on subsystems that
+	// are not fully reconstructed yet (GeneratorState/On, CondenserState, ReportLeak,
+	// Torso SpeedOfTorsoHorizontal/MotionState, Reservoir/Avionics/ControlsMapper ...).
+	// GetAttributePointer returns NULL for those, and the original engine Fail()s
+	// (fatal) -- which would abort every audio-enabled run.  Redirect NULL to a shared
+	// inert zero pad so scalar/vector watchers read 0 (that sound stays silent) instead
+	// of crashing; state watchers on it are skipped by the AudioStateWatcher guard.
+	// Self-clearing: a registered attribute resolves to its real member.  Remove once
+	// the subsystem attribute tables are reconstructed (the audio subsystem wave).
+	if (attributePointer == NULL)
+	{
+		static char s_missingAttrPad[64] = {0};
+		// TYPED pad: ConfigureActivePress is the held-configure-button INDEX whose
+		// authored idle is -1 (none) -- NINE audio triggers gate the configure-mode
+		// ticker on it with threshold -1 across the configurable subsystems.  The
+		// zero pad read as "button 0 held" and started the ticker at load (the
+		// eternal 2.7/s chirp).  Redirect this attribute to a -1 pad; others keep 0.
+		static int s_configureIdlePad = -1;
+		CString configure_name("ConfigureActivePress");
+		if (attribute_name == configure_name)
+			attributePointer = &s_configureIdlePad;
+		else
+			attributePointer = s_missingAttrPad;
+		if (getenv("BT_AUDIO_LOG"))
+			DEBUG_STREAM << "[attrnull] " << subsystem_name << "." << attribute_name
+				<< " not reconstructed -> "
+				<< (attributePointer == (void*)&s_configureIdlePad ? "-1 pad" : "inert pad")
+				<< "\n" << std::flush;
+	}
 
 	Check_Pointer(attributePointer);
 #endif
diff --git a/engine/MUNGA/WATCHER.h b/engine/MUNGA/WATCHER.h
index 289c053..654e465 100644
--- a/engine/MUNGA/WATCHER.h
+++ b/engine/MUNGA/WATCHER.h
@@ -1,4 +1,5 @@
 #pragma once
+#include <cstdlib>
 
 #include "cmpnnt.h"
 #include "slot.h"
@@ -155,14 +156,18 @@ private:
 	void
 		InitializeCurrentValue();
 
+protected:
 	//
 	//-----------------------------------------------------------------------
-	// GrabCurrentValue
+	// GrabCurrentValue -- protected (task #50): AudioScaleOf's per-poll
+	// Execute override calls it directly (see AUDWTHR.h).
 	//-----------------------------------------------------------------------
 	//
 	void
 		GrabCurrentValue();
 
+private:
+
 	//
 	//-----------------------------------------------------------------------
 	// DumpValue
@@ -262,8 +267,32 @@ template <class T> void
 	Check(this);
 
 	Check_Pointer(attributePointer);
+	if (getenv("BT_AUDIO_SPATIAL")) {	// poll-rate probe: total watcher polls + change events
+		static long s_polls=0; if ((++s_polls % 2000)==0)
+			DEBUG_STREAM << "[watchpoll] total polls=" << s_polls << "\n" << std::flush;
+		extern void *g_btFootStepAddr;	// DIAG: uncapped tracer on THE footstep watcher
+		if ((void*)attributePointer == g_btFootStepAddr) {
+			static long s_fsp=0;
+			if ((++s_fsp % 120)==0 || !(currentValue == *(T*)attributePointer))
+				DEBUG_STREAM << "[fswatch] poll#" << s_fsp << " cur=" << (int)*(int*)&currentValue
+					<< " mem=" << *(int*)attributePointer << "\n" << std::flush;
+		}
+		extern void *g_btAccelAddr;		// DIAG: poll-vs-change split on the accel attr
+		if ((void*)attributePointer == g_btAccelAddr) {
+			static long s_ap=0, s_ac=0;
+			int changed = !(currentValue == *(T*)attributePointer);
+			if (changed) ++s_ac;
+			if ((++s_ap % 120)==0 || (changed && (s_ac % 30)==0))
+				DEBUG_STREAM << "[accwatch] t=" << (GetTickCount() % 1000000)
+					<< " poll#" << s_ap << " changes=" << s_ac
+					<< " memY=" << ((float*)attributePointer)[1]
+					<< " curY=" << ((float*)&currentValue)[1] << "\n" << std::flush;
+		}
+	}
 	if (!(currentValue == *(T*)attributePointer))
 	{
+		if (getenv("BT_AUDIO_SPATIAL")) { static int s_chg=0; if (s_chg++<60)
+			DEBUG_STREAM << "[watchpoll] CHANGE attrPtr=" << (void*)attributePointer << "\n" << std::flush; }
 		#if DEBUG_LEVEL>0
 			if (dumpValue)
 			{
diff --git a/engine/MUNGA_L4/L4AUDEFX.cpp b/engine/MUNGA_L4/L4AUDEFX.cpp
new file mode 100644
index 0000000..d5019ab
--- /dev/null
+++ b/engine/MUNGA_L4/L4AUDEFX.cpp
@@ -0,0 +1,129 @@
+//###########################################################################
+//
+//	L4AUDEFX.cpp -- OpenAL EFX bridge (task #50, AUDIO_FIDELITY F9/F11).
+//	See L4AUDEFX.h for the fidelity rationale.
+//
+//###########################################################################
+#include <cstdlib>
+#include "mungal4.h"
+#pragma hdrstop
+
+#include "l4audefx.h"
+#include "openal/alc.h"
+#include "openal/efx.h"
+
+#ifndef AL_EFFECT_EAXREVERB
+#define AL_EFFECT_EAXREVERB 0x8000	// newer efx.h constant; OpenAL Soft supports it
+#endif
+
+namespace
+{
+	bool s_available = false;
+	ALuint s_reverbSlot = 0;
+	ALuint s_reverbEffect = 0;
+	ALuint s_scratchFilter = 0;
+
+	LPALGENEFFECTS               p_alGenEffects = 0;
+	LPALEFFECTI                  p_alEffecti = 0;
+	LPALEFFECTF                  p_alEffectf = 0;
+	LPALGENAUXILIARYEFFECTSLOTS  p_alGenAuxiliaryEffectSlots = 0;
+	LPALAUXILIARYEFFECTSLOTI     p_alAuxiliaryEffectSloti = 0;
+	LPALAUXILIARYEFFECTSLOTF     p_alAuxiliaryEffectSlotf = 0;
+	LPALGENFILTERS               p_alGenFilters = 0;
+	LPALFILTERI                  p_alFilteri = 0;
+	LPALFILTERF                  p_alFilterf = 0;
+}
+
+bool EFX_Available()
+{
+	return s_available;
+}
+
+bool EFX_Initialize(float global_reverb_scale)
+{
+	ALCcontext *context = alcGetCurrentContext();
+	if (context == 0)
+	{
+		return false;
+	}
+	ALCdevice *device = alcGetContextsDevice(context);
+	if (device == 0 || !alcIsExtensionPresent(device, "ALC_EXT_EFX"))
+	{
+		if (getenv("BT_AUDIO_LOG"))
+			DEBUG_STREAM << "[audio] EFX: ALC_EXT_EFX NOT present -- filters/reverb inert\n" << std::flush;
+		return false;
+	}
+
+	p_alGenEffects              = (LPALGENEFFECTS)alGetProcAddress("alGenEffects");
+	p_alEffecti                 = (LPALEFFECTI)alGetProcAddress("alEffecti");
+	p_alEffectf                 = (LPALEFFECTF)alGetProcAddress("alEffectf");
+	p_alGenAuxiliaryEffectSlots = (LPALGENAUXILIARYEFFECTSLOTS)alGetProcAddress("alGenAuxiliaryEffectSlots");
+	p_alAuxiliaryEffectSloti    = (LPALAUXILIARYEFFECTSLOTI)alGetProcAddress("alAuxiliaryEffectSloti");
+	p_alAuxiliaryEffectSlotf    = (LPALAUXILIARYEFFECTSLOTF)alGetProcAddress("alAuxiliaryEffectSlotf");
+	p_alGenFilters              = (LPALGENFILTERS)alGetProcAddress("alGenFilters");
+	p_alFilteri                 = (LPALFILTERI)alGetProcAddress("alFilteri");
+	p_alFilterf                 = (LPALFILTERF)alGetProcAddress("alFilterf");
+
+	if (!p_alGenEffects || !p_alEffecti || !p_alEffectf
+		|| !p_alGenAuxiliaryEffectSlots || !p_alAuxiliaryEffectSloti || !p_alAuxiliaryEffectSlotf
+		|| !p_alGenFilters || !p_alFilteri || !p_alFilterf)
+	{
+		if (getenv("BT_AUDIO_LOG"))
+			DEBUG_STREAM << "[audio] EFX: entry points missing -- filters/reverb inert\n" << std::flush;
+		return false;
+	}
+
+	alGetError();
+	p_alGenAuxiliaryEffectSlots(1, &s_reverbSlot);
+	p_alGenEffects(1, &s_reverbEffect);
+	if (alGetError() != AL_NO_ERROR)
+	{
+		return false;
+	}
+
+	// EAXReverb where available (OpenAL Soft: yes), plain reverb otherwise.
+	p_alEffecti(s_reverbEffect, AL_EFFECT_TYPE, AL_EFFECT_EAXREVERB);
+	if (alGetError() != AL_NO_ERROR)
+	{
+		p_alEffecti(s_reverbEffect, AL_EFFECT_TYPE, AL_EFFECT_REVERB);
+	}
+	p_alAuxiliaryEffectSloti(s_reverbSlot, AL_EFFECTSLOT_EFFECT, (ALint)s_reverbEffect);
+	// The authentic wet level: the original sent CC91 = global_reverb_scale
+	// (0.3 -> value 38) on every 3D channel; one global slot gain reproduces
+	// the same uniform send.
+	p_alAuxiliaryEffectSlotf(s_reverbSlot, AL_EFFECTSLOT_GAIN,
+		(global_reverb_scale < 0.0f) ? 0.0f :
+		(global_reverb_scale > 1.0f) ? 1.0f : global_reverb_scale);
+
+	p_alGenFilters(1, &s_scratchFilter);
+	p_alFilteri(s_scratchFilter, AL_FILTER_TYPE, AL_FILTER_LOWPASS);
+
+	s_available = (alGetError() == AL_NO_ERROR);
+	if (getenv("BT_AUDIO_LOG"))
+		DEBUG_STREAM << "[audio] EFX: " << (s_available ? "READY" : "FAILED")
+			<< " (reverb slot gain=" << global_reverb_scale << ")\n" << std::flush;
+	return s_available;
+}
+
+void EFX_SetSourceLowpassGainHF(ALuint source, float gainhf)
+{
+	if (!s_available)
+	{
+		return;
+	}
+	if (gainhf < 0.001f) gainhf = 0.001f;
+	if (gainhf > 1.0f)   gainhf = 1.0f;
+	// filter params are COPIED at attach, so one scratch filter serves all
+	p_alFilterf(s_scratchFilter, AL_LOWPASS_GAIN, 1.0f);
+	p_alFilterf(s_scratchFilter, AL_LOWPASS_GAINHF, gainhf);
+	alSourcei(source, AL_DIRECT_FILTER, (ALint)s_scratchFilter);
+}
+
+void EFX_AttachReverbSend(ALuint source)
+{
+	if (!s_available)
+	{
+		return;
+	}
+	alSource3i(source, AL_AUXILIARY_SEND_FILTER, (ALint)s_reverbSlot, 0, AL_FILTER_NULL);
+}
diff --git a/engine/MUNGA_L4/L4AUDEFX.h b/engine/MUNGA_L4/L4AUDEFX.h
new file mode 100644
index 0000000..423c85c
--- /dev/null
+++ b/engine/MUNGA_L4/L4AUDEFX.h
@@ -0,0 +1,44 @@
+#pragma once
+//###########################################################################
+//
+//	L4AUDEFX.h -- OpenAL EFX bridge for the authored filter/reverb chains
+//	(task #50, AUDIO_FIDELITY F9/F11).
+//
+//	The original drove the AWE32 initial-filter-cutoff NRPN per frame
+//	(brightness x distance HF rolloff) and sent CC91 reverb on the 3D
+//	channels (global_reverb_scale=0.3, AUDIO.INI) while keeping the cockpit
+//	Direct channels dry.  This bridge reproduces both through OpenAL Soft's
+//	EFX extension: one EAXReverb aux slot + a scratch AL_FILTER_LOWPASS
+//	whose parameters are copied at attach time.
+//
+//###########################################################################
+
+#include "openal/al.h"
+
+// Load the EFX entry points, create the reverb slot (gain = the authentic
+// global_reverb_scale) and the scratch lowpass.  Call once, with the AL
+// context current.  Returns false (and stays inert) without ALC_EXT_EFX.
+bool EFX_Initialize(float global_reverb_scale);
+
+bool EFX_Available();
+
+// Per-frame direct-path lowpass: gainhf is the linear HF gain at the EFX
+// 5 kHz reference.  Callers map the AWE cutoff (100 + scale*7900/127 Hz)
+// through EFX_CutoffScaleToGainHF below.
+void EFX_SetSourceLowpassGainHF(ALuint source, float gainhf);
+
+// AWE NRPN 21 curve -> EFX gainhf: cutoff_scale in [0,1] of the 100-8000 Hz
+// span; approximated as the attenuation of a 2-pole lowpass at the 5 kHz
+// reference [T3 -- curve shape approximate, endpoints exact].
+inline float EFX_CutoffScaleToGainHF(float cutoff_scale)
+{
+	if (cutoff_scale < 0.0f) cutoff_scale = 0.0f;
+	if (cutoff_scale > 1.0f) cutoff_scale = 1.0f;
+	float cutoff_hz = 100.0f + cutoff_scale * 7900.0f;
+	float g = (cutoff_hz / 5000.0f) * (cutoff_hz / 5000.0f);
+	return (g > 1.0f) ? 1.0f : ((g < 0.001f) ? 0.001f : g);
+}
+
+// Wet-exterior routing: attach the source's aux send to the reverb slot
+// (Dynamic3D/Static3D).  Direct cockpit sources stay dry by default.
+void EFX_AttachReverbSend(ALuint source);
diff --git a/engine/MUNGA_L4/L4AUDIO.cpp b/engine/MUNGA_L4/L4AUDIO.cpp
index 9932a79..942dc41 100644
--- a/engine/MUNGA_L4/L4AUDIO.cpp
+++ b/engine/MUNGA_L4/L4AUDIO.cpp
@@ -1,14 +1,29 @@
+#include <cmath>
+#include <cstdlib>
 #include "mungal4.h"
 #pragma hdrstop
 
 #include "l4audio.h"
 #include "l4audlvl.h"
+#include "l4audefx.h"
 #include "l4app.h"
 #include "l4audrnd.h"
 #include "..\munga\namelist.h"
 #include "..\munga\player.h"
 #include "..\rp\vtv.h"
 
+
+// NOTE -> PITCH (task #50): the AWE32 played every patch at the requested MIDI
+// note relative to the sample root (60); sequences author notes (klaxon/ambience
+// rhythms are PITCHED patterns).  The port captured noteValue but never applied
+// any pitch to the AL sources -- everything played at root (the "chirping"
+// ambience: an authored deep tick at note 51 sounded as a high click).  Apply
+// pitch = 2^((note-60)/12) x the control-chain cents offset at start + per frame.
+static inline float BTNotePitchFactor(int note_value)
+{
+	return (float)pow(2.0, ((double)note_value - 60.0) / 12.0);
+}
+
 //#############################################################################
 //#######################    L4AudioSpatialization    #########################
 //#############################################################################
@@ -921,7 +936,13 @@ void
 	patch_resource = Cast_Object(PatchResource*, GetAudioResource());
 	Check(patch_resource);
 	patch_resource->SetDistance(GetDistanceToSource());
-	patch_resource->SetupPatch(channelSet);
+	patch_resource->SetupPatch(channelSet, (int)GetCurrentNoteValue());
+
+	{	// apply the requested note's pitch to the freshly attached sources
+		float note_pitch = BTNotePitchFactor((int)GetCurrentNoteValue());
+		for (int _i = 0; _i < channelSet.count; ++_i)
+			alSourcef(channelSet.sources[_i], AL_PITCH, note_pitch);
+	}
 
 	//
 	// Set the channel to default control values
@@ -944,6 +965,31 @@ void
 		channel->SendController(MIDI_PAN_CONTROL, MIDI_RIGHT_PAN_VALUE);
 		break;
 	}*/
+	// (task #50, AUDIO_FIDELITY F12) the original routed each Direct cockpit
+	// source by its authored 6-value position enum (front/rear CARD + pan
+	// CC10 left/center/right).  Reproduce as a listener-relative placement;
+	// a zone's own L/R pan (stereo-pair presets) offsets on top.  The
+	// distance model is AL_NONE, so this affects direction only, never gain.
+	{
+		float px = 0.0f, pz = -1.0f;					// Front, centered
+		switch (audioPosition)
+		{
+		case FrontDirectPatchPosition:      px =  0.0f; pz = -1.0f; break;
+		case RearDirectPatchPosition:       px =  0.0f; pz =  1.0f; break;
+		case FrontLeftDirectPatchPosition:  px = -0.7f; pz = -0.7f; break;
+		case FrontRightDirectPatchPosition: px =  0.7f; pz = -0.7f; break;
+		case RearLeftDirectPatchPosition:   px = -0.7f; pz =  0.7f; break;
+		case RearRightDirectPatchPosition:  px =  0.7f; pz =  0.7f; break;
+		}
+		for (int _i = 0; _i < channelSet.count; ++_i)
+		{
+			SAMPLEINFO zinfo = PRESET_getSampleInfo(
+				patch_resource->GetBankID(), patch_resource->GetPatchID(), _i);
+			float pan_x = (zinfo.chan == CHANNEL_LEFT) ? -0.5f :
+						  (zinfo.chan == CHANNEL_RIGHT) ? 0.5f : 0.0f;
+			alSource3f(channelSet.sources[_i], AL_POSITION, px + pan_x, 0.0f, pz);
+		}
+	}
 
 	//
 	// Set midi history to default control values
@@ -979,7 +1025,7 @@ void
 	//
 	//TODO:  Start OpenAL source playing
 //	channel->SendNoteOn(GetCurrentNoteValue(), midi_velocity);
-	patch_resource->PlayNote(channelSet);
+	patch_resource->PlayNote(channelSet, (int)GetCurrentNoteValue());
 
 	#if 0
 		Tell("On " << (int)GetCurrentNoteValue() << "\n");
@@ -1033,6 +1079,11 @@ void
 	pitch_offset = CalculateSourcePitchOffset();
 	double relativePitch = pow(2.0,pitch_offset/1200.0);
 	Clamp(relativePitch,0.5,2.0);
+	{	// apply the combined control-chain + note pitch per frame
+		float _np = BTNotePitchFactor((int)GetCurrentNoteValue());
+		for (int _i = 0; _i < channelSet.count; ++_i)
+			alSourcef(channelSet.sources[_i], AL_PITCH, (float)relativePitch * _np);
+	}
 
 	//
 	//--------------------------------------------------------------------------
@@ -1057,6 +1108,13 @@ void
 		if (Abs(filter_difference) >= filter_resolution)
 		{
 			lastMIDIFilterCutoff = midi_filter_cutoff;
+			// (task #50, AUDIO_FIDELITY F9) the original sent this cutoff as
+			// AWE NRPN 21; the EFX lowpass is the modern sink (was a dead
+			// bookkeeping write -- ctl-5 Brightness played full-bright).
+			float gainhf = EFX_CutoffScaleToGainHF(
+				(float)lastMIDIFilterCutoff / (float)MIDI_MAX_CONTROL_VALUE);
+			for (int _i = 0; _i < channelSet.count; ++_i)
+				EFX_SetSourceLowpassGainHF(channelSet.sources[_i], gainhf);
 		}
 	}
 
@@ -1076,10 +1134,12 @@ void
 	Check(audio_renderer);
 	AudioHead *audio_head = audio_renderer->GetAudioHead();
 	Check(audio_head);
+	if (getenv("BT_AUDIO_SPATIAL")) { static int s_dp=0; if ((s_dp++ % 120)==0)
+		DEBUG_STREAM << "[spatial] direct src=" << (channelSet.count>0?channelSet.sources[0]:0)
+			<< " vol=" << volume_scale << "\n" << std::flush; }
 	for (int i=0; i < channelSet.count; i++)
 	{
-		alSourcef(channelSet.sources[i],AL_MAX_DISTANCE,audio_location->getMaxDistance(audio_head));
-      alSourcef(channelSet.sources[i], AL_GAIN, volume_scale);
+      alSourcef(channelSet.sources[i], AL_GAIN, volume_scale * volume_scale);	// FIDELITY F4: CC7 squared law (linear was ~+6 dB at mid volumes)
 	}
 }
 
@@ -1204,7 +1264,13 @@ void
 	patch_resource = Cast_Object(PatchResource*, GetAudioResource());
 	Check(patch_resource);
 	patch_resource->SetDistance(GetDistanceToSource());
-	patch_resource->SetupPatch(channelSet);
+	patch_resource->SetupPatch(channelSet, (int)GetCurrentNoteValue());
+
+	{	// apply the requested note's pitch to the freshly attached sources
+		float note_pitch = BTNotePitchFactor((int)GetCurrentNoteValue());
+		for (int _i = 0; _i < channelSet.count; ++_i)
+			alSourcef(channelSet.sources[_i], AL_PITCH, note_pitch);
+	}
 
 	/*patch_resource->SetDistance(GetDistanceToSource());
 	for (i = 0; i < AudioChannelSetSize; i++)
@@ -1227,6 +1293,12 @@ void
 		channel->SendController(MIDI_REVERB_CONTROL, midi_reverb_level);
 		channel->SendController(MIDI_CHORUS_CONTROL, MIDI_MIN_CONTROL_VALUE);
 	}*/
+	// (task #50, AUDIO_FIDELITY F11) the CC91 send above is the authentic
+	// wet-exterior contrast (global_reverb_scale on every 3D channel, decomp
+	// part_008.c:7278-7394); the EFX aux slot is the modern sink.  Cockpit
+	// Direct sources stay dry (their CC91 was 0).
+	for (int _i = 0; _i < channelSet.count; ++_i)
+		EFX_AttachReverbSend(channelSet.sources[_i]);
 
 	//
 	// Set the channels to correct pan
@@ -1299,7 +1371,7 @@ void
 		Check(channel);
 		channel->SendNoteOn(GetCurrentNoteValue(), midi_velocity);
 	}*/
-	patch_resource->PlayNote(channelSet);
+	patch_resource->PlayNote(channelSet, (int)GetCurrentNoteValue());
 }
 
 //
@@ -1405,15 +1477,43 @@ void
 
 	pitch_offset = CalculateSourcePitchOffset();
 
+	// FIDELITY (AUDIO_FIDELITY.md F10): the AUTHORED doppler (AUDIO.INI
+	// doppler_range/speed_of_sound -> AudioLocation::dopplerCents, computed each
+	// spatial update) -- the decomp proves the original added it to the pitch
+	// cents on THIS dynamic path (part_008.c:7466).  AL's own doppler is now
+	// disabled (it ran with wrong constants and a sign-inverted velocity feed).
+	pitch_offset += GetAudioLocation()->GetDopplerCents();
+
 	double relativePitch = pow(2.0,pitch_offset/1200.0);
 	Clamp(relativePitch,0.5,2.0);
+	{	// apply the combined control-chain + note pitch per frame
+		float _np = BTNotePitchFactor((int)GetCurrentNoteValue());
+		for (int _i = 0; _i < channelSet.count; ++_i)
+			alSourcef(channelSet.sources[_i], AL_PITCH, (float)relativePitch * _np);
+	}
+
+	if (getenv("BT_AUDIO_SPATIAL")) { static int s_sp=0; if ((s_sp++ % 120) == 0)
+		DEBUG_STREAM << "[spatial] dyn src=" << (channelSet.count>0?channelSet.sources[0]:0)
+			<< " head=(" << headPosition.x << "," << headPosition.z << ")"
+			<< " loc=(" << locationPosition.x << "," << locationPosition.z << ")"
+			<< " dist=" << posMag << " vol=" << volume_scale << "\n" << std::flush; }
+
+	// (task #50, AUDIO_FIDELITY F9) the original drove the AWE filter cutoff
+	// from highFreqCutoffScale x brightnessScale on this dynamic path --
+	// UNGATED, all channels (part_008.c:7496,7589-7604): every moving 3D
+	// sound gets duller with distance (AUDIO.INI knee 60 / exponent 2.0).
+	float dyn_gainhf = EFX_CutoffScaleToGainHF(
+		(float)(GetAudioLocation()->GetHighFreqCutoffScale()
+			* CalculateSourceBrightnessScale()
+			* (Scalar)patch_resource->GetMaxMIDIFilterCutoff()
+			/ (Scalar)MIDI_MAX_CONTROL_VALUE));
 
 	for (int i=0; i < channelSet.count; i++)
 	{
 		alSource3f(channelSet.sources[i],AL_POSITION,pos.x,pos.y,pos.z);
-		alSourcef(channelSet.sources[i], AL_GAIN, volume_scale);
+		alSourcef(channelSet.sources[i], AL_GAIN, volume_scale * volume_scale);	// FIDELITY F4: CC7 squared law (linear was ~+6 dB at mid volumes)
 		alSource3f(channelSet.sources[i],AL_VELOCITY,-relative_velocity.x,-relative_velocity.y,-relative_velocity.z);
-		alSourcef(channelSet.sources[i],AL_MAX_DISTANCE,audio_location->getMaxDistance(audio_head));
+		EFX_SetSourceLowpassGainHF(channelSet.sources[i], dyn_gainhf);
 	}
 
 }
@@ -1432,22 +1532,18 @@ AudioControlValue
 	//
 	Scalar 
 		volume_scale = L4AudioSource::CalculateSourceVolumeScale();
-	return volume_scale;
-	
-	//
-	// Update the spatial model that will result in the value
-	// for distance related volume attenuation
-	//
-	/*Check(application);
-	Check(application->GetAudioRenderer());
-	UpdateSpatialModel(application->GetAudioRenderer()->GetAudioHead());
 
 	//
-	// Apply distance attenuation to the volume scale
-	//	
+	// FIDELITY (AUDIO_FIDELITY.md F3): apply the AUTHORED distance attenuation
+	// (AUDIO.INI knee/rolloff curve, computed into distanceVolumeScale on every
+	// spatial update).  This multiply was commented out and AL_LINEAR_DISTANCE
+	// substituted -- far sounds faded on a straight line to zero instead of the
+	// authored 1/(1+(k(d-knee))^2) curve, and the volume-based cull / voice
+	// steal / ducking chains were distance-blind.  AL's model is now AL_NONE.
+	//
 	Check(GetAudioLocation());
 	volume_scale *= GetAudioLocation()->GetDistanceVolumeScale();
-	return volume_scale;*/
+	return volume_scale;
 }
 
 //#############################################################################
@@ -1637,6 +1733,22 @@ void
   //    StartRequest(this);
 }
 
+//
+//#############################################################################
+//#############################################################################
+//
+AudioControlValue
+	Static3DPatchSource::CalculateSourceVolumeScale()
+{
+	Check(this);
+	// FIDELITY (AUDIO_FIDELITY.md F3): same authored distance attenuation as the
+	// dynamic path -- the spatial model computes distanceVolumeScale per execute.
+	Scalar volume_scale = L4AudioSource::CalculateSourceVolumeScale();
+	Check(GetAudioLocation());
+	volume_scale *= GetAudioLocation()->GetDistanceVolumeScale();
+	return volume_scale;
+}
+
 //
 //#############################################################################
 //#############################################################################
@@ -1693,7 +1805,13 @@ void
 	patch_resource = Cast_Object(PatchResource*, GetAudioResource());
 	Check(patch_resource);
 	patch_resource->SetDistance(GetDistanceToSource());
-	patch_resource->SetupPatch(channelSet);
+	patch_resource->SetupPatch(channelSet, (int)GetCurrentNoteValue());
+
+	{	// apply the requested note's pitch to the freshly attached sources
+		float note_pitch = BTNotePitchFactor((int)GetCurrentNoteValue());
+		for (int _i = 0; _i < channelSet.count; ++_i)
+			alSourcef(channelSet.sources[_i], AL_PITCH, note_pitch);
+	}
 	/*for (i = 0; i < AudioChannelSetSize; i++)
 	{
 		if ((channel = channelSet.GetNth(i)) != NULL)
@@ -1718,6 +1836,10 @@ void
 			channel->SendController(MIDI_CHORUS_CONTROL, MIDI_MIN_CONTROL_VALUE);
 		}
 	}*/
+	// (task #50, AUDIO_FIDELITY F11) static 3D sources are wet like the
+	// dynamic ones (the CC91 block above); Direct cockpit stays dry.
+	for (int _i = 0; _i < channelSet.count; ++_i)
+		EFX_AttachReverbSend(channelSet.sources[_i]);
 
 	//
 	// Set the channels to correct pan
@@ -1850,7 +1972,7 @@ void
 			channel->SendNoteOn(GetCurrentNoteValue(), midi_velocity);
 		}
 	}*/
-	patch_resource->PlayNote(channelSet);
+	patch_resource->PlayNote(channelSet, (int)GetCurrentNoteValue());
 
 }
 
@@ -1921,6 +2043,11 @@ void
 	pitch_offset = CalculateSourcePitchOffset();
 	double relativePitch = pow(2.0,pitch_offset/1200.0);
 	Clamp(relativePitch,0.5,2.0);
+	{	// apply the combined control-chain + note pitch per frame
+		float _np = BTNotePitchFactor((int)GetCurrentNoteValue());
+		for (int _i = 0; _i < channelSet.count; ++_i)
+			alSourcef(channelSet.sources[_i], AL_PITCH, (float)relativePitch * _np);
+	}
 
    Vector3D relative_position;
    Vector3D relative_velocity;
@@ -1933,12 +2060,19 @@ void
 	   relative_position = audio_location->GetVectorToSource();
    }
 
+	// (task #50, AUDIO_FIDELITY F9) static sources: brightness-driven cutoff
+	// only (part_008.c:7831-7884 -- the NRPN block commented below).
+	float static_gainhf = EFX_CutoffScaleToGainHF(
+		(float)(CalculateSourceBrightnessScale()
+			* (Scalar)patch_resource->GetMaxMIDIFilterCutoff()
+			/ (Scalar)MIDI_MAX_CONTROL_VALUE));
+
 	//Static models have their position freely available as relative positions and stand still
 	for (int i=0; i < channelSet.count; i++)
 	{
-      alSourcef(channelSet.sources[i], AL_GAIN, volume_scale);
+      alSourcef(channelSet.sources[i], AL_GAIN, volume_scale * volume_scale);	// FIDELITY F4: CC7 squared law (linear was ~+6 dB at mid volumes)
 		alSource3f(channelSet.sources[i],AL_POSITION,relative_position.x,relative_position.y,relative_position.z);
-		alSourcef(channelSet.sources[i],AL_MAX_DISTANCE,audio_location->getMaxDistance(audio_head));
+		EFX_SetSourceLowpassGainHF(channelSet.sources[i], static_gainhf);
 	}
 
 	//
diff --git a/engine/MUNGA_L4/L4AUDIO.h b/engine/MUNGA_L4/L4AUDIO.h
index b0eaa1e..67a634b 100644
--- a/engine/MUNGA_L4/L4AUDIO.h
+++ b/engine/MUNGA_L4/L4AUDIO.h
@@ -552,6 +552,10 @@ public:
 // State implementations
 //
 public:
+		// FIDELITY (AUDIO_FIDELITY.md F3): statics get the authored distance curve too
+	AudioControlValue
+		CalculateSourceVolumeScale();
+
 	void
 		StartImplementation();
 	void
diff --git a/engine/MUNGA_L4/L4AUDLVL.cpp b/engine/MUNGA_L4/L4AUDLVL.cpp
index 35baa6b..73285e1 100644
--- a/engine/MUNGA_L4/L4AUDLVL.cpp
+++ b/engine/MUNGA_L4/L4AUDLVL.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "mungal4.h"
 #pragma hdrstop
 
@@ -8,6 +9,100 @@
 #include "..\munga\namelist.h"
 #include "openal/al.h"
 
+//~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Release fades ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// (task #50, AUDIO_FIDELITY F13) ~20 looping presets author a releaseVolEnv of
+// 1.1-3.9 s the AWE32 applied as a note-off fade while the loop continued;
+// StopNote registers a dB-linear ramp here instead of cutting.  Serviced once
+// per frame from AudioHead::Execute; a fade finishing (or being reclaimed by a
+// restart) stops + rewinds the source so the next SetupPatch sees AL_INITIAL.
+//
+namespace
+{
+	struct ReleaseFade
+	{
+		ALuint source;
+		float gain0;
+		float duration;
+		float elapsed;
+		bool active;
+	};
+	const int MAX_RELEASE_FADES = 64;
+	ReleaseFade s_releaseFades[MAX_RELEASE_FADES];
+
+	void FinishFade(ReleaseFade &fade)
+	{
+		alSourceStop(fade.source);
+		alSourceRewind(fade.source);
+		alSourcef(fade.source, AL_GAIN, fade.gain0);
+		fade.active = false;
+	}
+
+	void StartReleaseFade(ALuint source, float duration)
+	{
+		for (int i = 0; i < MAX_RELEASE_FADES; i++)
+		{
+			if (s_releaseFades[i].active && s_releaseFades[i].source == source)
+			{
+				return;		// already releasing
+			}
+		}
+		for (int i = 0; i < MAX_RELEASE_FADES; i++)
+		{
+			if (!s_releaseFades[i].active)
+			{
+				ReleaseFade &fade = s_releaseFades[i];
+				fade.source = source;
+				alGetSourcef(source, AL_GAIN, &fade.gain0);
+				fade.duration = duration;
+				fade.elapsed = 0.0f;
+				fade.active = true;
+				return;
+			}
+		}
+		// table full -- fall back to the instant cut
+		alSourceStop(source);
+		alSourceRewind(source);
+	}
+
+	// A restart wants this source back NOW: finalize any fade so the caller
+	// sees AL_INITIAL with the pre-fade gain restored.
+	void ReclaimFadingSource(ALuint source)
+	{
+		for (int i = 0; i < MAX_RELEASE_FADES; i++)
+		{
+			if (s_releaseFades[i].active && s_releaseFades[i].source == source)
+			{
+				FinishFade(s_releaseFades[i]);
+				return;
+			}
+		}
+	}
+}
+
+void PRESET_serviceReleaseFades(float elapsed_seconds)
+{
+	for (int i = 0; i < MAX_RELEASE_FADES; i++)
+	{
+		ReleaseFade &fade = s_releaseFades[i];
+		if (!fade.active)
+		{
+			continue;
+		}
+		fade.elapsed += elapsed_seconds;
+		if (fade.elapsed >= fade.duration)
+		{
+			FinishFade(fade);
+		}
+		else
+		{
+			// dB-linear ramp to -96 dB over the authored release time
+			float attenuation = powf(10.0f, -4.8f * (fade.elapsed / fade.duration));
+			alSourcef(fade.source, AL_GAIN, fade.gain0 * attenuation);
+		}
+	}
+}
+
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PatchLevelOfDetail ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 #if DEBUG_LEVEL>0
@@ -26,7 +121,10 @@ PatchLevelOfDetail::PatchLevelOfDetail(PlugStream *stream):
 	MemoryStream_Read(stream, &patchID);
 	MemoryStream_Read(stream, &maxMIDIFilterCutoff);
 
-	Warn(GetVoiceCount() > 4); // HACK - AWE appears to only play 1st 4 voices
+	// (task #50) the AWE 4-voice comment applied to layers SHARING a key range;
+	// full-zone presets legitimately carry up to MAX_PRESET_SAMPLES zones
+	// (key-splits select at most a few per note).
+	Warn(GetVoiceCount() > MAX_PRESET_SAMPLES);
 
 	#ifdef LAB_ONLY
 		setupCount = 0;
@@ -118,7 +216,7 @@ Logical
 //#############################################################################
 //
 void
-	PatchLevelOfDetail::SetupPatch(SourceSet sourceSet)
+	PatchLevelOfDetail::SetupPatch(SourceSet sourceSet, int note)
 {
 //	Check(this);
 ////	Check(channel);
@@ -128,24 +226,44 @@ void
 //	#endif
    SAMPLEINFO info;
 
-	//Attach buffers
+	// (task #50, AUDIO_FIDELITY F1) the authored MIDI note SELECTS zones:
+	// attach only samples whose [keyLo,keyHi] contains the note (key-splits
+	// pick one band, layers attach together); detach the rest so a rewound
+	// source can't replay a stale buffer from a previous note.
 	for (int i=0; i < sourceSet.count; i++)
 	{
 		info = PRESET_getSampleInfo(bankID,patchID,i);
 		if (info.bufferIndex >= 0)
 		{
+			ReclaimFadingSource(sourceSet.sources[i]);
+
 			ALenum sourceState;
 			alGetSourcei(sourceSet.sources[i], AL_SOURCE_STATE, &sourceState);
 
+			bool zone_matches = (note >= info.keyLo && note <= info.keyHi);
+
+			if (getenv("BT_AUDIO_SPATIAL")) { static int s_se=0; if (s_se++<200)
+				DEBUG_STREAM << "[audio] SetupPatch ENTRY bank=" << (int)bankID << " patch=" << (int)patchID << " src=" << sourceSet.sources[i]
+					<< " file=" << (info.file?info.file:"?") << " note=" << note << (zone_matches?"":" ZONESKIP")
+					<< " state=" << sourceState << " (INITIAL=" << AL_INITIAL << ")" << "\n" << std::flush; }
+
 			if (sourceState == AL_INITIAL)
 			{
-				alSourcei(sourceSet.sources[i],AL_BUFFER,AL_getBuffer(info.bufferIndex));
+				alSourcei(sourceSet.sources[i],AL_BUFFER,
+					zone_matches ? AL_getBuffer(info.bufferIndex) : 0);
+				{ static int s_a=0; if (getenv("BT_AUDIO_LOG") && s_a++<24) DEBUG_STREAM << "[audio] SetupPatch src=" << sourceSet.sources[i] << " file=" << (info.file?info.file:"?") << " loop=" << (info.loop==ForceStatic?0:1) << "\n" << std::flush; }
 				alSourcei(sourceSet.sources[i],AL_SOURCE_RELATIVE,AL_TRUE);
 
 				AudioRenderer *render = application->GetAudioRenderer();
 				AudioHead *head = render->GetAudioHead();
 
-				alSource3f(sourceSet.sources[i],AL_POSITION,0,0,0);
+				// (F1) authored stereo pairs: pan hard-left/right zones via a
+				// listener-relative offset (the distance model is AL_NONE, so
+				// this affects direction only, never gain).
+				float pan_x =
+					(info.chan == CHANNEL_LEFT) ? -0.5f :
+					(info.chan == CHANNEL_RIGHT) ? 0.5f : 0.0f;
+				alSource3f(sourceSet.sources[i],AL_POSITION,pan_x,0,0);
 				alSource3f(sourceSet.sources[i],AL_VELOCITY,0,0,0);
 
 				if (info.loop == ForceStatic)
@@ -173,7 +291,7 @@ void
 	#endif*/
 }
 
-void PatchLevelOfDetail::PlayNote(SourceSet sourceSet)
+void PatchLevelOfDetail::PlayNote(SourceSet sourceSet, int note)
 {
 	if (sourceSet.count > 0 && sourceSet.sources != NULL)
 	{
@@ -182,12 +300,21 @@ void PatchLevelOfDetail::PlayNote(SourceSet sourceSet)
 
 		for (int i = 0; i < sourceSet.count; i++)
 		{
+			// (F1) play only the zones SetupPatch attached for this note
+			ALint attached = 0;
+			alGetSourcei(sourceSet.sources[i], AL_BUFFER, &attached);
+			if (attached == 0)
+			{
+				continue;
+			}
+
 			ALenum state;
 			alGetSourcei(sourceSet.sources[i], AL_SOURCE_STATE, &state);
 
 			if (state != AL_PLAYING)
 			{
 				alSourcePlay(sourceSet.sources[i]);
+				{ static int s_p=0; if (getenv("BT_AUDIO_LOG") && s_p++<30) DEBUG_STREAM << "[audio] PlayNote alSourcePlay src=" << sourceSet.sources[i] << " note=" << note << "\n" << std::flush; }
 			}
 
 			ALenum error = alGetError();
@@ -202,10 +329,27 @@ void PatchLevelOfDetail::PlayNote(SourceSet sourceSet)
 
 void PatchLevelOfDetail::StopNote(SourceSet sourceSet)
 {
+	if (getenv("BT_AUDIO_LOG")) { static int s_s=0; if (s_s++<400) { DEBUG_STREAM << "[audio] StopNote"; for (int _i=0;_i<sourceSet.count;_i++) DEBUG_STREAM << " src=" << sourceSet.sources[_i]; DEBUG_STREAM << "\n" << std::flush; } }
 	if (sourceSet.count >0 && sourceSet.sources != NULL)
 	{
-		alSourceStopv(sourceSet.count, sourceSet.sources);
-		alSourceRewindv(sourceSet.count, sourceSet.sources);
+		// (task #50, AUDIO_FIDELITY F13) honor the authored releaseVolEnv:
+		// a playing zone with a release time fades out dB-linearly instead of
+		// cutting; everything else stops instantly (faithful for one-shots).
+		for (int i = 0; i < sourceSet.count; i++)
+		{
+			SAMPLEINFO info = PRESET_getSampleInfo(bankID,patchID,i);
+			ALenum state;
+			alGetSourcei(sourceSet.sources[i], AL_SOURCE_STATE, &state);
+			if (state == AL_PLAYING && info.releaseSec > 0.05f)
+			{
+				StartReleaseFade(sourceSet.sources[i], info.releaseSec);
+			}
+			else
+			{
+				alSourceStop(sourceSet.sources[i]);
+				alSourceRewind(sourceSet.sources[i]);
+			}
+		}
 	}
 }
 
@@ -259,7 +403,7 @@ Logical
 //#############################################################################
 //
 void
-	PatchResource::SetupPatch(SourceSet sourceSet)
+	PatchResource::SetupPatch(SourceSet sourceSet, int note)
 {
 	Check(this);
 //	Check(channel);
@@ -268,10 +412,10 @@ void
 		Cast_Object(PatchLevelOfDetail*, GetAudioLevelOfDetail());
 
 	Check(patch_level_of_detail);
-	patch_level_of_detail->SetupPatch(sourceSet);
+	patch_level_of_detail->SetupPatch(sourceSet, note);
 }
 
-void PatchResource::PlayNote(SourceSet sourceSet)
+void PatchResource::PlayNote(SourceSet sourceSet, int note)
 {
 	Check(this);
 //	Check(channel);
@@ -280,7 +424,7 @@ void PatchResource::PlayNote(SourceSet sourceSet)
 		Cast_Object(PatchLevelOfDetail*, GetAudioLevelOfDetail());
 
 	Check(patch_level_of_detail);
-	patch_level_of_detail->PlayNote(sourceSet);
+	patch_level_of_detail->PlayNote(sourceSet, note);
 }
 
 void PatchResource::StopNote(SourceSet sourceSet)
@@ -295,6 +439,24 @@ void PatchResource::StopNote(SourceSet sourceSet)
 	patch_level_of_detail->StopNote(sourceSet);
 }
 
+//
+//#############################################################################
+//#############################################################################
+//
+int PatchResource::GetBankID()
+{
+	PatchLevelOfDetail *patch_level_of_detail =
+		Cast_Object(PatchLevelOfDetail*, GetAudioLevelOfDetail());
+	return (patch_level_of_detail != 0) ? patch_level_of_detail->GetBankID() : 0;
+}
+
+int PatchResource::GetPatchID()
+{
+	PatchLevelOfDetail *patch_level_of_detail =
+		Cast_Object(PatchLevelOfDetail*, GetAudioLevelOfDetail());
+	return (patch_level_of_detail != 0) ? patch_level_of_detail->GetPatchID() : 0;
+}
+
 //
 //#############################################################################
 //#############################################################################
diff --git a/engine/MUNGA_L4/L4AUDLVL.h b/engine/MUNGA_L4/L4AUDLVL.h
index 73dca59..934aea8 100644
--- a/engine/MUNGA_L4/L4AUDLVL.h
+++ b/engine/MUNGA_L4/L4AUDLVL.h
@@ -26,22 +26,38 @@ struct SAMPLEINFO
 	const char *file;
 	SampleChannel chan;
 	SampleLoop loop;
+	// (task #50, AUDIO_FIDELITY F1/F13) full-zone metadata from the SF2 banks:
+	// the authored MIDI note SELECTS zones by [keyLo,keyHi]; loop regions are
+	// sub-ranges in sample frames (AL_SOFT_loop_points); releaseSec is the
+	// authored releaseVolEnv fade applied on Stop instead of an instant cut.
+	int keyLo;
+	int keyHi;
+	int loopStart;
+	int loopEnd;
+	float releaseSec;
 };
 
+// AllExplosion (bank2 p125) authors 25 layered zones -- the largest preset.
+const int MAX_PRESET_SAMPLES = 25;
+
 struct PRESETINFO
 {
 	int sampleNum;
-	SAMPLEINFO samples[5];
+	SAMPLEINFO samples[MAX_PRESET_SAMPLES];
 	bool is3d;
 };
 
-extern PRESETINFO allPresets[2][100];
+extern PRESETINFO allPresets[2][128];
 
 bool PRESET_isImplemented(int bank, int preset);
 int PRESET_getNumSamples(int bank, int preset);
 SAMPLEINFO PRESET_getSampleInfo(int bank, int preset, int sampleInd);
 void PRESET_setBufferIndex(int bank, int preset, int sampleInd, int index);
 
+// (task #50, AUDIO_FIDELITY F13) authored release fades: StopNote registers a
+// dB-linear gain ramp instead of cutting; AudioHead::Execute services them.
+void PRESET_serviceReleaseFades(float elapsed_seconds);
+
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PatchLevelOfDetail ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 typedef MIDIValue	SBKPatchID;
@@ -59,7 +75,7 @@ public:
 	PatchLevelOfDetail(PlugStream *stream);
 	~PatchLevelOfDetail();
 
-	void PlayNote(SourceSet sourceSet);
+	void PlayNote(SourceSet sourceSet, int note);
 	void StopNote(SourceSet sourceSet);
 
 	Logical
@@ -69,6 +85,11 @@ public:
 		GetVoiceCount()
 			{return PRESET_getNumSamples(bankID,patchID);}
 
+	// (task #50) expose the authored bank/patch so the game-side footstep
+	// intensity send can identify footstep sources precisely.
+	int GetBankID()  const { return (int)bankID; }
+	int GetPatchID() const { return (int)patchID; }
+
 	//
 	//-----------------------------------------------------------------------
 	// BuildFromPage
@@ -88,7 +109,7 @@ public:
 	//-----------------------------------------------------------------------
 	//
 	void
-		SetupPatch(SourceSet sourceSet);
+		SetupPatch(SourceSet sourceSet, int note);
 
 	MIDINRPNValue
 		GetMaxMIDIFilterCutoff()
@@ -136,7 +157,7 @@ public:
 	PatchResource(PlugStream *stream);
 	~PatchResource();
 
-	void PlayNote(SourceSet sourceSet);
+	void PlayNote(SourceSet sourceSet, int note);
 	void StopNote(SourceSet sourceSet);
 
 	Logical
@@ -161,9 +182,14 @@ public:
 	//-----------------------------------------------------------------------
 	//
 	void
-		SetupPatch(SourceSet sourceSet);
+		SetupPatch(SourceSet sourceSet, int note);
 
 	MIDINRPNValue
 		GetMaxMIDIFilterCutoff();
+
+	// (task #50) authored bank/patch pass-throughs (the LOD accessor is
+	// protected on AudioResource) -- zone metadata lookups at the source layer.
+	int GetBankID();
+	int GetPatchID();
 };
 
diff --git a/engine/MUNGA_L4/L4AUDRES.cpp b/engine/MUNGA_L4/L4AUDRES.cpp
index 4244eb6..bbb1fb9 100644
--- a/engine/MUNGA_L4/L4AUDRES.cpp
+++ b/engine/MUNGA_L4/L4AUDRES.cpp
@@ -1,3 +1,7 @@
+#include <stdio.h>
+#include <direct.h>
+#include <string.h>
+#include <cstdlib>
 #include "mungal4.h"
 #pragma hdrstop
 
@@ -13,10 +17,66 @@
 #include "..\munga\app.h"
 #include "..\munga\notation.h"
 #include "openal\al.h"
-#include "sndfile.h"
+#include "openal\alc.h"
 
 ALuint *g_buffers;
 int g_numBuffers;
+const char *g_bufferNames[512];		// bufferInd -> sample file (diag: the live-playing dump)
+int g_curAudioWatcherClass = 0;
+
+//
+// Minimal canonical-PCM WAV reader.  The repo's libsndfile-1.dll is a STUB
+// (exports 15 funcs by ordinal only, no names -- sf_open always returns NULL
+// and sf_strerror(NULL) faults), so the original sf_open path loaded nothing.
+// Our soundbank samples (AUDIO1/2.RES, cracked by scratchpad/sf2extract.py)
+// are written as plain 16-bit mono PCM WAVs, so a tiny RIFF/WAVE fmt+data
+// parser loads the real sample data directly into the AL buffer -- no
+// external dependency, no stub.  Handles 8/16-bit mono/stereo PCM.
+//
+static bool LoadWavPCM(const char *path, char **outData, int *outBytes,
+                       int *outChannels, int *outBits, int *outRate)
+{
+	FILE *fp = fopen(path, "rb");
+	if (!fp) return false;
+	fseek(fp, 0, SEEK_END); long flen = ftell(fp); fseek(fp, 0, SEEK_SET);
+	if (flen < 44) { fclose(fp); return false; }
+	unsigned char *buf = new unsigned char[flen];
+	size_t got = fread(buf, 1, flen, fp);
+	fclose(fp);
+	if ((long)got != flen) { delete [] buf; return false; }
+	if (memcmp(buf, "RIFF", 4) != 0 || memcmp(buf + 8, "WAVE", 4) != 0) { delete [] buf; return false; }
+	int channels = 0, bits = 0, rate = 0;
+	char *pcm = 0; int pcmBytes = 0;
+	bool haveFmt = false;
+	long p = 12;
+	while (p + 8 <= flen)
+	{
+		const unsigned char *id = buf + p;
+		unsigned int csz = buf[p+4] | (buf[p+5]<<8) | (buf[p+6]<<16) | ((unsigned)buf[p+7]<<24);
+		long body = p + 8;
+		if (memcmp(id, "fmt ", 4) == 0 && csz >= 16)
+		{
+			channels = buf[body+2] | (buf[body+3]<<8);
+			rate     = buf[body+4] | (buf[body+5]<<8) | (buf[body+6]<<16) | ((unsigned)buf[body+7]<<24);
+			bits     = buf[body+14] | (buf[body+15]<<8);
+			haveFmt = true;
+		}
+		else if (memcmp(id, "data", 4) == 0)
+		{
+			long avail = flen - body;
+			pcmBytes = ((long)csz <= avail) ? (int)csz : (int)avail;
+			if (pcmBytes < 0) pcmBytes = 0;
+			pcm = new char[pcmBytes > 0 ? pcmBytes : 1];
+			memcpy(pcm, buf + body, pcmBytes);
+		}
+		p = body + csz + (csz & 1);   // RIFF chunks are word-aligned
+	}
+	delete [] buf;
+	if (!haveFmt || pcm == 0) { delete [] pcm; return false; }
+	*outData = pcm; *outBytes = pcmBytes;
+	*outChannels = channels; *outBits = bits; *outRate = rate;
+	return true;
+}
 
 //#############################################################################
 //#######################    AudioObjectStream    #############################
@@ -82,6 +142,11 @@ RegisteredClass*
 	Check(this);
    Verify(class_ID != RegisteredClass::NullClassID);
 
+   // DIAG (BT_ATTRBIND_LOG): record which audio-object ClassID is being built so the
+   // AttributeWatcher trace can print the watcher TYPE alongside the bound attribute.
+   extern int g_curAudioWatcherClass;
+   g_curAudioWatcherClass = (int)class_ID;
+
    //
    //-----------------------------------------------------------------------
    // HACK - Constructors should be referenced through registration, for
@@ -542,7 +607,7 @@ void
 
 	for(int i=1; i <= 2; i++)
 	{
-		for (int j=0; j < 100; j++)
+		for (int j=0; j < 128; j++)
 		{
 			if (PRESET_isImplemented(i,j))
 			{
@@ -558,6 +623,7 @@ void
 		alGetError();
 		g_buffers = new ALuint[g_numBuffers];
 		alGenBuffers(g_numBuffers,g_buffers);
+		if (getenv("BT_AUDIO_LOG")) DEBUG_STREAM << "[audio] alGenBuffers count=" << g_numBuffers << "\n" << std::flush;
 		ALenum error;
 		if ((error = alGetError()) != AL_NO_ERROR)
 		{
@@ -572,7 +638,7 @@ void
 	//Load buffers
 	for(int i=1; i<=2 && bufferInd < g_numBuffers; i++)
 	{
-		for(int j=0; j<100 && bufferInd < g_numBuffers; j++)
+		for(int j=0; j<128 && bufferInd < g_numBuffers; j++)
 		{
 			if (PRESET_isImplemented(i,j))
 			{
@@ -580,84 +646,86 @@ void
 				{
 					SAMPLEINFO info = PRESET_getSampleInfo(i,j,k);
 
-					//Load WAV to buffer
-					char *data;
-					int size;
-
 					//Open WAV
 					char fullname[50];
-					strcpy_s(fullname,50,"AUDIO\\");
+					strcpy_s(fullname,50,"AUDIO/");
 					strcat_s(fullname,50,info.file);
-					SF_INFO *sfInfo = new SF_INFO[2];
-					//SF_INFO is working different than expected!
-					sfInfo->format = 0;
-					SNDFILE *file = sf_open(fullname,SFM_READ,sfInfo);
-
-					if (file == NULL)
+					char *data = 0; int size = 0;
+					int wavCh = 0, wavBits = 0, wavRate = 0;
+					if (!LoadWavPCM(fullname, &data, &size, &wavCh, &wavBits, &wavRate))
 					{
-						DEBUG_STREAM << "Failed to open." << std::endl;
+						if (getenv("BT_AUDIO_LOG") && bufferInd == 0) {
+							char cwd[512]; cwd[0]=0; _getcwd(cwd, sizeof(cwd));
+							DEBUG_STREAM << "[audio] DIAG cwd=[" << cwd << "] path=[" << fullname << "] WAV load FAILED\n" << std::flush;
+						}
+						DEBUG_STREAM << "[audio] Failed to open AUDIO/" << info.file << " -- skipping\n" << std::flush;
+						PRESET_setBufferIndex(i,j,k,bufferInd);
+						bufferInd++;
+						continue;
 					}
 
-					unsigned long formatBits = 0;
-					unsigned long sampleRate = sfInfo->samplerate;
-               size = sfInfo->frames;
-
-					bool isMono = (sfInfo->channels == 1);
-
-               if (sfInfo->format & SF_FORMAT_PCM_S8)
-               {
-                  formatBits = 8;
-               } else if (sfInfo->format & SF_FORMAT_PCM_16)
-               {
-                  formatBits = 16;
-               } else
-               {
-                  DEBUG_STREAM << "BAD FORMAT" << std::endl;
-               }
-
 					ALenum format;
-					if (formatBits == 8)
+					if (wavBits == 8)
+						format = (wavCh == 1) ? AL_FORMAT_MONO8 : AL_FORMAT_STEREO8;
+					else
+						format = (wavCh == 1) ? AL_FORMAT_MONO16 : AL_FORMAT_STEREO16;
+
+					//Feed the buffer with the real PCM sample data
+					alBufferData(g_buffers[bufferInd], format, data, size, wavRate);
+
+					// (task #50, AUDIO_FIDELITY F13) honor the authored loop
+					// REGION -- the EMU8000 looped [dwStartLoop,dwEndLoop], not
+					// the whole sample (MechExplosion's boom carries a ~16 ms
+					// sustain slice that must not replay the full boom).
+					#ifndef AL_LOOP_POINTS_SOFT
+					#define AL_LOOP_POINTS_SOFT 0x2015
+					#endif
+					if (info.loop != ForceStatic && info.loopEnd > info.loopStart)
 					{
-						if (isMono)
-						{
-							format = AL_FORMAT_MONO8;
-						} else
-						{
-                     size *= 2;
-							format = AL_FORMAT_STEREO8;
-						}
-					} else if (formatBits == 16)
-					{
-                  size *= 2;
-						if (isMono)
-						{
-							format = AL_FORMAT_MONO16;
-						} else
-						{
-                     size *= 2;
-							format = AL_FORMAT_STEREO16;
-						}
+						ALint loop_points[2] = { info.loopStart, info.loopEnd };
+						alGetError();
+						alBufferiv(g_buffers[bufferInd], AL_LOOP_POINTS_SOFT, loop_points);
+						ALenum lpErr = alGetError();
+						if (lpErr != AL_NO_ERROR && getenv("BT_AUDIO_LOG"))
+							DEBUG_STREAM << "[audio] loop-points REJECTED buf" << bufferInd
+								<< " " << info.file << " [" << info.loopStart << ","
+								<< info.loopEnd << "] err=" << lpErr << "\n" << std::flush;
 					}
 
-					ALsizei alSampleRate = sampleRate;
-
-					//Load size & data
-					delete [] sfInfo;
-					data = new char[size];
-               sf_read_raw(file,data,size);
-					sf_close(file);
-
-					//Feed the buffer
-					alBufferData(g_buffers[bufferInd],format,data,size,alSampleRate);
+					if (bufferInd < 512) g_bufferNames[bufferInd] = info.file;
+					if (getenv("BT_AUDIO_LOG") && bufferInd < 3)
+						DEBUG_STREAM << "[audio] loaded buf" << bufferInd << " " << info.file
+							<< " ch=" << wavCh << " bits=" << wavBits << " rate=" << wavRate
+							<< " bytes=" << size << " alErr=" << alGetError() << "\n" << std::flush;
 					PRESET_setBufferIndex(i,j,k,bufferInd);
 					bufferInd++;
-
-               delete [] data;
+					delete [] data;
 				}
 			}
 		}
 	}
 
+	if (getenv("BT_AUDIO_TEST") && g_numBuffers > 0)
+	{
+		// PROOF OF LIFE: play the first loaded sample so we can confirm the
+		// SF2 -> WAV -> OpenAL buffer -> speakers path works end to end.
+		ALCcontext *ctx = alcGetCurrentContext();
+		alGetError();
+		ALuint testsrc = 0; alGenSources(1, &testsrc);
+		ALenum genErr = alGetError();
+		alSourcei(testsrc, AL_BUFFER, g_buffers[0]);
+		ALenum bufErr = alGetError();
+		alSourcei(testsrc, AL_LOOPING, AL_TRUE);
+		alSourcef(testsrc, AL_GAIN, 1.0f);
+		alSourcePlay(testsrc);
+		ALenum playErr = alGetError();
+		ALint st = 0; alGetSourcei(testsrc, AL_SOURCE_STATE, &st);
+		DEBUG_STREAM << "[audio] TEST-PLAY buffer0 src=" << testsrc
+			<< " ctx=" << (void*)ctx
+			<< " genErr=" << genErr << " bufErr=" << bufErr << " playErr=" << playErr
+			<< " state=" << st << " playing=" << (int)(st==AL_PLAYING) << "\n" << std::flush;
+	}
+
 	//
 	//----------------------------------------------------------------------
 	// Load the sound banks
diff --git a/engine/MUNGA_L4/L4AUDRND.cpp b/engine/MUNGA_L4/L4AUDRND.cpp
index 9521f87..8077135 100644
--- a/engine/MUNGA_L4/L4AUDRND.cpp
+++ b/engine/MUNGA_L4/L4AUDRND.cpp
@@ -1,3 +1,4 @@
+#include <cstdlib>
 #include "mungal4.h"
 #pragma hdrstop
 
@@ -98,6 +99,7 @@ void
 	L4AudioRenderer::Initialize()
 {
 	Check(this);
+	if (getenv("BT_AUDIO_LOG")) DEBUG_STREAM << "[audio] L4AudioRenderer::Initialize ENTERED\n" << std::flush;
 
 	//
 	//----------------------------------------------------------------------
@@ -133,6 +135,7 @@ void
 
 	NotationFile notation_file(audio_file_name);
 	Check(&notation_file);
+	if (getenv("BT_AUDIO_LOG")) DEBUG_STREAM << "[audio] notation file opened; about to read scalars\n" << std::flush;
 
 	//
 	//----------------------------------------------------------------------
@@ -379,6 +382,23 @@ void
 	{
 		ALCcontext *context = alcCreateContext(device,NULL);
 		alcMakeContextCurrent(context);
+		// Master volume: AL_GAIN on the listener scales EVERY source.  Default 0.6
+		// (the raw samples are hot); override with BT_AUDIO_VOLUME=<0.0..1.0+>.
+		float masterVol = 0.6f;
+		if (const char *v = getenv("BT_AUDIO_VOLUME")) { float f = (float)atof(v); if (f >= 0.0f) masterVol = f; }
+		alListenerf(AL_GAIN, masterVol);
+		if (getenv("BT_AUDIO_LOG")) DEBUG_STREAM << "[audio] OpenAL device OPENED + context current; master gain=" << masterVol << "\n" << std::flush;
+		// (task #50, AUDIO_FIDELITY F9/F11) EFX bridge: the authored lowpass
+		// chains + the wet-exterior/dry-cockpit reverb split, at the authentic
+		// AUDIO.INI global_reverb_scale read above.
+		{
+			extern bool EFX_Initialize(float global_reverb_scale);
+			EFX_Initialize(global_reverb_scale);
+		}
+	}
+	else
+	{
+		if (getenv("BT_AUDIO_LOG")) DEBUG_STREAM << "[audio] OpenAL device FAILED to open (alcOpenDevice NULL)\n" << std::flush;
 	}
 
 	//
diff --git a/engine/MUNGA_L4/L4NET.CPP b/engine/MUNGA_L4/L4NET.CPP
index 4294529..a6b0c34 100644
--- a/engine/MUNGA_L4/L4NET.CPP
+++ b/engine/MUNGA_L4/L4NET.CPP
@@ -970,8 +970,17 @@ void L4NetworkManager::HostDisconnectedMessageHandler(HostDisconnectedMessage* H
 			//
 			// Post a listen for a console so it can reconnect if it wants to.
 			//
-			NetTransport_Get()->Close(gameListenerSocket);
-			gameListenerSocket = NULL;
+			// FIX (task #50, 2026-07-15): this used to close the GAME listener here
+			// (shutdown/closesocket(gameListenerSocket)) on a CONSOLE disconnect -- a
+			// naming bug: the comment above + the commented-out OpenConnection below
+			// intended to re-post a CONSOLE listen, which CreateConsoleHost() (below)
+			// already does.  Closing the game listener on console loss needlessly
+			// bounced the game-accept path (harmless to already-established peer
+			// sockets -- which is why a live 2-node match keeps replicating through a
+			// console loss -- but wrong, and it would have blocked a NEW peer from
+			// joining after a console cycle).  Removed; CreateConsoleHost re-listens.
+			// (BT412: the NetTransport seam close that briefly lived here is dropped
+			// with the bug it wrapped.)
 			//unsigned long console_socket	=	OpenConnection(
 			//	NETNUB_TCP_LISTEN,
 			//	((L4Application *)application)->GetNetworkCommonFlatAddress(),			// Local port
@@ -2138,6 +2147,12 @@ Logical L4NetworkManager::CheckBuffers(NetworkPacket *network_packet)
 					{
 						continue;
 					}
+					// TCP_NODELAY on the accepted GAME socket (not the console):
+					// without it Nagle coalesces the inbound per-frame update
+					// records into bursts -> the peer is received in lurches.
+					BOOL gameNoDelay = TRUE;
+					if (setsockopt(tempSocket, IPPROTO_TCP, TCP_NODELAY, (char*)&gameNoDelay, sizeof(gameNoDelay)))
+						DEBUG_STREAM << "WARN: could not set TCP_NODELAY on accepted game socket; setsockopt() failed with " << WSAGetLastError() << "\n" << std::flush;
 				}
 
 				remote_host->SetNetworkSocket(tempSocket);
@@ -2683,6 +2698,9 @@ SOCKET L4NetworkManager::OpenConnection(
 		remoteEndpoint.sin_addr.S_un.S_addr = internet_address;
 		remoteEndpoint.sin_port = htons(remote_port);
 
+		// BT412: the raw connect/retry/nonblocking/TCP_NODELAY sequence that
+		// lived here now lives in WinsockNetTransport::Connect (the seam) --
+		// including BT411's task-#50 TCP_NODELAY latency fix, folded in there.
 		return (SOCKET) NetTransport_Get()->Connect(&remoteEndpoint, local_port);
 	}
 	else if(connection_type == NETNUB_TCP_LISTEN)
diff --git a/engine/MUNGA_L4/L4NETTRANSPORT.cpp b/engine/MUNGA_L4/L4NETTRANSPORT.cpp
index 166d421..8e68b8c 100644
--- a/engine/MUNGA_L4/L4NETTRANSPORT.cpp
+++ b/engine/MUNGA_L4/L4NETTRANSPORT.cpp
@@ -164,6 +164,18 @@ namespace
 						closesocket(sock);
 						return InvalidConnection;
 					}
+					// TCP_NODELAY (BT411 task #50, folded into the seam): disable
+					// Nagle so the small per-frame update records ship immediately
+					// instead of being coalesced.  Nagle + delayed-ACK batch the
+					// tiny position packets into ~40-200ms bursts, so a peer moving
+					// at a steady speed is RECEIVED in lurches (dead-reckoned ground
+					// speed swinging 3x per 0.25s window).  The pod net carries
+					// steady real-time state where latency, not throughput, matters.
+					BOOL no_delay = TRUE;
+					if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
+						(char *) &no_delay, sizeof(no_delay)))
+						DEBUG_STREAM << "WARN: could not set TCP_NODELAY on active socket; setsockopt() failed with "
+							<< WSAGetLastError() << "\n" << std::flush;
 					return (Connection) sock;
 				}
 
diff --git a/engine/MUNGA_L4/L4VIDEO.cpp b/engine/MUNGA_L4/L4VIDEO.cpp
index 81eb4cb..bbc9ef3 100644
--- a/engine/MUNGA_L4/L4VIDEO.cpp
+++ b/engine/MUNGA_L4/L4VIDEO.cpp
@@ -8577,6 +8577,37 @@ void DPLRenderer::ExecuteImplementation(RendererComplexity, RendererOrigin::Inte
 		const double presentMs = (double)(_rt2.QuadPart - _rt1.QuadPart) * 1000.0 / (double)_rf.QuadPart;
 		static double sAcc = 0.0, sMaxD = 0.0, sMaxP = 0.0; static int sFrames = 0;
 		sAcc += drawMs + presentMs; ++sFrames;
+		// RENDER-frame heading probe (BT_RENDHDG): count render frames that redraw
+		// the SAME peer heading (stale between sim updates) vs frames where it moved.
+		// sameHeading >> moved => the peer sim updates slower than the render draws,
+		// so the rotation stutters regardless of how smooth each sim step is.
+		if (getenv("BT_RENDHDG"))
+		{
+			extern volatile float gBTReplRenderYaw;
+			static float sPrevY = -999.0f, sMaxStep = 0.0f, sSumStep = 0.0f;
+			static int sN = 0, sBack = 0; static double sHAcc = 0.0;
+			const float y = gBTReplRenderYaw;
+			if (sPrevY > -900.0f)
+			{
+				float d = y - sPrevY;                       // per-RENDER-frame heading change
+				if (d >  3.14159f) d -= 6.28319f;           // unwrap
+				if (d < -3.14159f) d += 6.28319f;
+				const float ad = (d < 0.0f) ? -d : d;
+				sSumStep += ad; if (ad > sMaxStep) sMaxStep = ad;
+				if (d > 0.0f) ++sBack;                      // spin is -yaw here; +step == backward
+				++sN;
+			}
+			sPrevY = y; sHAcc += drawMs + presentMs;
+			if (sHAcc >= 1000.0 && sN > 0)
+			{
+				const float avg = sSumStep / sN;
+				DEBUG_STREAM << "[rendhdg] avgStep=" << avg << " maxStep=" << sMaxStep
+					<< " max/avg=" << (avg > 1e-6f ? sMaxStep / avg : 0.0f)
+					<< " backwardFrames=" << sBack << "/" << sN
+					<< "  (smooth: max/avg~1, backward~0)\n" << std::flush;
+				sMaxStep = 0.0f; sSumStep = 0.0f; sN = 0; sBack = 0; sHAcc = 0.0;
+			}
+		}
 		if (drawMs > sMaxD) sMaxD = drawMs;
 		if (presentMs > sMaxP) sMaxP = presentMs;
 		if (drawMs + presentMs > 150.0)
diff --git a/engine/MUNGA_L4/WTPresets.cpp b/engine/MUNGA_L4/WTPresets.cpp
index 047f309..bd57f53 100644
--- a/engine/MUNGA_L4/WTPresets.cpp
+++ b/engine/MUNGA_L4/WTPresets.cpp
@@ -4,7 +4,7 @@ bool PRESET_isImplemented(int bank, int presetn)
 {
 	PRESETINFO preset = allPresets[bank-1][presetn];
 
-	if (preset.sampleNum <= 0 || preset.sampleNum >= 5)
+	if (preset.sampleNum <= 0 || preset.sampleNum > MAX_PRESET_SAMPLES)
 	{
 		return false;
 	}
@@ -27,15 +27,20 @@ int PRESET_getNumSamples(int bank, int preset)
 
 SAMPLEINFO PRESET_getSampleInfo(int bank, int preset, int sampleInd)
 {
-	SAMPLEINFO default;
-	default.chan = SampleChannel::CHANNEL_CENTER;
-	default.file = "";
-	default.implemented = false;
-	default.loop = SampleLoop::LoopAtWill;
-
 	if (sampleInd < 0 || sampleInd >= allPresets[bank-1][preset].sampleNum)
 	{
-		return default;
+		SAMPLEINFO none;
+		none.bufferIndex = -1;
+		none.implemented = false;
+		none.file = "";
+		none.chan = SampleChannel::CHANNEL_CENTER;
+		none.loop = SampleLoop::LoopAtWill;
+		none.keyLo = 0;
+		none.keyHi = 127;
+		none.loopStart = 0;
+		none.loopEnd = 0;
+		none.releaseSec = 0.0f;
+		return none;
 	}
 
 	return allPresets[bank-1][preset].samples[sampleInd];
@@ -44,4 +49,4 @@ SAMPLEINFO PRESET_getSampleInfo(int bank, int preset, int sampleInd)
 void PRESET_setBufferIndex(int bank, int preset, int sampleInd, int index)
 {
 	allPresets[bank-1][preset].samples[sampleInd].bufferIndex = index;
-}
\ No newline at end of file
+}
diff --git a/engine/lib/OpenAL32.dll b/engine/lib/OpenAL32.dll
index 5cf2ff1..188e232 100644
Binary files a/engine/lib/OpenAL32.dll and b/engine/lib/OpenAL32.dll differ
diff --git a/engine/lib/libsndfile-1.dll b/engine/lib/libsndfile-1.dll
deleted file mode 100644
index d8ba6ba..0000000
Binary files a/engine/lib/libsndfile-1.dll and /dev/null differ
diff --git a/engine/lib/libsndfile-1.lib b/engine/lib/libsndfile-1.lib
deleted file mode 100644
index e812c2e..0000000
Binary files a/engine/lib/libsndfile-1.lib and /dev/null differ
diff --git a/game/reconstructed/ammobin.cpp b/game/reconstructed/ammobin.cpp
index 7dbe10e..0125e4f 100644
--- a/game/reconstructed/ammobin.cpp
+++ b/game/reconstructed/ammobin.cpp
@@ -94,7 +94,22 @@ Derivation
 	);
 
 Receiver::MessageHandlerSet		AmmoBin::MessageHandlers;
-Simulation::AttributeIndexSet	AmmoBin::AttributeIndex;
+
+// AmmoState -> ammoAlarm (@0x194).  Chained to HeatWatcher so the inherited
+// SimulationState (and any parent attrs) resolve -- the old bare AttributeIndex
+// had no parent, so nothing resolved on an AmmoBin.
+const AmmoBin::IndexEntry
+	AmmoBin::AttributePointers[]=
+{
+	ATTRIBUTE_ENTRY(AmmoBin, AmmoState, ammoAlarm),	// @0x194 (0x54 StateIndicator-compatible feed alarm)
+	ATTRIBUTE_ENTRY(AmmoBin, FireCountdownStarted, cookOffArmed)	// F18 @0x18C -- ammo cook-off warning gate
+};
+
+Simulation::AttributeIndexSet	AmmoBin::AttributeIndex(
+	ELEMENTS(AmmoBin::AttributePointers),
+	AmmoBin::AttributePointers,
+	HeatWatcher::GetAttributeIndex()
+);
 
 AmmoBin::SharedData
 	AmmoBin::DefaultData(						// resolved as &DAT_005125bc
diff --git a/game/reconstructed/ammobin.hpp b/game/reconstructed/ammobin.hpp
index de82ff7..e37c3d7 100644
--- a/game/reconstructed/ammobin.hpp
+++ b/game/reconstructed/ammobin.hpp
@@ -113,6 +113,21 @@
 			StateCount
 		};
 
+		// Attribute Support -- audio binds an AudioStateWatcher to AmmoState; it
+		// resolves to ammoAlarm (@0x194, a 0x54 StateIndicator-compatible alarm) so
+		// the feed/reload/empty audio fires on the AmmoState transition.  The static
+		// AttributeIndex (ammobin.cpp) is now chained to HeatWatcher -- previously it
+		// was a bare, unchained index, so even SimulationState resolved to NULL.
+		enum {
+			AmmoStateAttributeID = HeatWatcher::NextAttributeID,
+			FireCountdownStartedAttributeID,	// F18: the ammo COOK-OFF warning (binary
+												// AmmoBin table @0x512600 -> +0x18C); the 4
+												// authored start/stop match watchers gate the
+												// cook-off countdown klaxon on it
+			NextAttributeID
+		};
+		static const IndexEntry AttributePointers[];
+
 		typedef void
 			(AmmoBin::*Performance)(Scalar time_slice);
 
diff --git a/game/reconstructed/audiopresets.cpp b/game/reconstructed/audiopresets.cpp
new file mode 100644
index 0000000..6fd6c34
--- /dev/null
+++ b/game/reconstructed/audiopresets.cpp
@@ -0,0 +1,631 @@
+// GENERATED by tools/sf2extract.py -- the audio soundbank table.
+// FULL-ZONE extraction (AUDIO_FIDELITY.md F1/F2/F13/F14): every preset
+// carries ALL its instrument zones (key-splits, layers, stereo pairs)
+// with per-zone key range, loop region (frames), release seconds and
+// channel; per-zone tuning + attenuation are baked into the WAVs.
+// Regenerate: python tools/sf2extract.py
+#include <L4AUDLVL.hpp>
+
+PRESETINFO allPresets[2][128] = {};
+
+namespace {
+void Z(int b, int p, const char *file, int keyLo, int keyHi, SampleLoop loop,
+       int loopStart, int loopEnd, float releaseSec, SampleChannel chan)
+{
+	PRESETINFO &pi = allPresets[b][p];
+	if (pi.sampleNum >= MAX_PRESET_SAMPLES) return;
+	SAMPLEINFO &s = pi.samples[pi.sampleNum++];
+	s.implemented = true; s.bufferIndex = -1; s.file = file;
+	s.keyLo = keyLo; s.keyHi = keyHi; s.loop = loop;
+	s.loopStart = loopStart; s.loopEnd = loopEnd;
+	s.releaseSec = releaseSec; s.chan = chan;
+}
+
+struct AudioPresetInit {
+	AudioPresetInit() {
+		Z(0,0,"EnginePower01.wav",12,107,LoopAtWill,148,42365,1.546f,CHANNEL_CENTER);
+		Z(0,1,"EngineMotor01.wav",12,107,LoopAtWill,212,42989,1.546f,CHANNEL_CENTER);
+		Z(0,2,"EngineMotor02_z0.wav",12,107,LoopAtWill,324,35476,1.546f,CHANNEL_LEFT);
+		Z(0,2,"EngineMotor02_z1.wav",12,107,LoopAtWill,324,35476,1.546f,CHANNEL_RIGHT);
+		Z(0,3,"EngineDamage01_z0.wav",12,107,LoopAtWill,2,36065,1.546f,CHANNEL_LEFT);
+		Z(0,3,"EngineDamage01_z1.wav",12,107,LoopAtWill,2,36065,1.546f,CHANNEL_RIGHT);
+		Z(0,4,"EngineAccel01_z0.wav",12,107,LoopAtWill,0,19726,3.911f,CHANNEL_CENTER);
+		Z(0,4,"EngineAccel01_z1.wav",12,107,LoopAtWill,0,19726,2.986f,CHANNEL_CENTER);
+		Z(0,5,"EngineShiftFwd01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,5,"EngineShiftFwd01_z1.wav",12,107,LoopAtWill,0,24082,1.546f,CHANNEL_CENTER);
+		Z(0,5,"EngineShiftFwd01_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,6,"EngineShiftRev01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,6,"EngineShiftRev01_z1.wav",12,107,LoopAtWill,0,24082,1.546f,CHANNEL_CENTER);
+		Z(0,6,"EngineShiftRev01_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,7,"TorsoTwistInt01.wav",12,107,LoopAtWill,56,13656,1.398f,CHANNEL_CENTER);
+		Z(0,8,"TorsoTwistExt01.wav",12,107,LoopAtWill,56,13656,1.193f,CHANNEL_CENTER);
+		Z(0,9,"MyomerServo01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,10,"LaserAMisfire01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,11,"LaserAFire01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,11,"LaserAFire01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,11,"LaserAFire01_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,12,"LaserAFire02_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,12,"LaserAFire02_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,12,"LaserAFire02_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,13,"LaserAFire03_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,13,"LaserAFire03_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,13,"LaserAFire03_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,14,"LaserASustain01_z0.wav",12,107,LoopAtWill,0,7473,0.000f,CHANNEL_CENTER);
+		Z(0,14,"LaserASustain01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,14,"LaserASustain01_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,15,"LaserASustain02_z0.wav",12,107,LoopAtWill,0,7473,0.000f,CHANNEL_CENTER);
+		Z(0,15,"LaserASustain02_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,15,"LaserASustain02_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,16,"LaserASustain03_z0.wav",12,107,LoopAtWill,0,7473,0.000f,CHANNEL_CENTER);
+		Z(0,16,"LaserASustain03_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,16,"LaserASustain03_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,17,"LaserARelease01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,18,"LaserARelease02.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,19,"LaserARelease03.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,20,"LaserACharge01.wav",12,107,LoopAtWill,43,32667,1.309f,CHANNEL_CENTER);
+		Z(0,21,"LaserACharge02.wav",12,107,LoopAtWill,43,32667,1.309f,CHANNEL_CENTER);
+		Z(0,22,"LaserACharge03.wav",12,107,LoopAtWill,43,32667,1.309f,CHANNEL_CENTER);
+		Z(0,23,"LaserACharge04.wav",12,107,LoopAtWill,43,32667,1.309f,CHANNEL_CENTER);
+		Z(0,24,"LaserBFire01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(0,24,"LaserBFire01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,24,"LaserBFire01_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(0,25,"LaserBFire02_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(0,25,"LaserBFire02_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,25,"LaserBFire02_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(0,26,"LaserBFire03_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(0,26,"LaserBFire03_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,26,"LaserBFire03_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(0,27,"LaserBSustain01_z0.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,27,"LaserBSustain01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,27,"LaserBSustain01_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,28,"LaserBSustain02_z0.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,28,"LaserBSustain02_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,28,"LaserBSustain02_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,29,"LaserBSustain03_z0.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,29,"LaserBSustain03_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,29,"LaserBSustain03_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,30,"LaserCFire01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,30,"LaserCFire01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,30,"LaserCFire01_z2.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,31,"LaserCFire02_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,31,"LaserCFire02_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,31,"LaserCFire02_z2.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,32,"LaserCFire03_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,32,"LaserCFire03_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,32,"LaserCFire03_z2.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,33,"LaserCSustain01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,33,"LaserCSustain01_z1.wav",12,107,LoopAtWill,283,11616,0.000f,CHANNEL_CENTER);
+		Z(0,33,"LaserCSustain01_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,34,"LaserCSustain02_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,34,"LaserCSustain02_z1.wav",12,107,LoopAtWill,283,11616,0.000f,CHANNEL_CENTER);
+		Z(0,34,"LaserCSustain02_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,35,"LaserCSustain03_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,35,"LaserCSustain03_z1.wav",12,107,LoopAtWill,283,11616,0.000f,CHANNEL_CENTER);
+		Z(0,35,"LaserCSustain03_z2.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,36,"MissileMisfire01_z0.wav",12,59,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,36,"MissileMisfire01_z1.wav",60,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,37,"MissileLaunch01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,37,"MissileLaunch01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,37,"MissileLaunch01_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,37,"MissileLaunch01_z3.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,38,"MissileTravel01.wav",12,107,LoopAtWill,0,38274,1.309f,CHANNEL_CENTER);
+		Z(0,39,"MissileLoading01.wav",12,107,LoopAtWill,27,6991,1.253f,CHANNEL_CENTER);
+		Z(0,40,"MissileLoaded01_z0.wav",12,59,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,40,"MissileLoaded01_z1.wav",60,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,41,"AutoCanonMisfire01_z0.wav",12,59,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,41,"AutoCanonMisfire01_z1.wav",60,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,42,"AutoCanonFire01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,42,"AutoCanonFire01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,42,"AutoCanonFire01_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,43,"AutoCanonAction01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,43,"AutoCanonAction01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,43,"AutoCanonAction01_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,44,"ProjectileATravel01.wav",12,107,LoopAtWill,6,26533,1.124f,CHANNEL_CENTER);
+		Z(0,45,"TriggerDurLoad01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,46,"LaserASustainExt01.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,47,"LaserASustainExt02.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,48,"LaserASustainExt03.wav",12,107,LoopAtWill,59,16752,0.000f,CHANNEL_CENTER);
+		Z(0,49,"LaserBSustainExt01.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,50,"LaserBSustainExt02.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,51,"LaserBSustainExt03.wav",12,107,LoopAtWill,348,9040,0.000f,CHANNEL_CENTER);
+		Z(0,52,"LaserCSustainExt01.wav",12,107,LoopAtWill,283,11616,0.000f,CHANNEL_CENTER);
+		Z(0,53,"LaserCSustainExt02.wav",12,107,LoopAtWill,283,11616,0.000f,CHANNEL_CENTER);
+		Z(0,54,"LaserCSustainExt03.wav",12,107,LoopAtWill,283,11616,0.000f,CHANNEL_CENTER);
+		Z(0,55,"AutoCanonFireExt01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,56,"LaserLoaded01_z0.wav",12,59,LoopAtWill,43,32667,1.309f,CHANNEL_CENTER);
+		Z(0,56,"LaserLoaded01_z1.wav",60,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,57,"EngineAccel02_z0.wav",12,107,LoopAtWill,324,35476,1.546f,CHANNEL_LEFT);
+		Z(0,57,"EngineAccel02_z1.wav",12,107,LoopAtWill,126,45884,1.546f,CHANNEL_RIGHT);
+		Z(0,58,"EngineAccel03_z0.wav",12,107,LoopAtWill,6,50367,1.546f,CHANNEL_LEFT);
+		Z(0,58,"EngineAccel03_z1.wav",12,107,LoopAtWill,6,50367,1.546f,CHANNEL_RIGHT);
+		Z(0,59,"EngineAccel04_z0.wav",12,107,LoopAtWill,424,44918,1.546f,CHANNEL_LEFT);
+		Z(0,59,"EngineAccel04_z1.wav",12,107,LoopAtWill,424,44918,1.546f,CHANNEL_RIGHT);
+		Z(0,60,"EngineAccel05_z0.wav",12,107,LoopAtWill,199,44095,1.546f,CHANNEL_LEFT);
+		Z(0,60,"EngineAccel05_z1.wav",12,107,LoopAtWill,199,44095,1.546f,CHANNEL_RIGHT);
+		Z(0,61,"EngineAccel06_z0.wav",12,107,LoopAtWill,324,35476,1.546f,CHANNEL_LEFT);
+		Z(0,61,"EngineAccel06_z1.wav",12,107,LoopAtWill,6,50367,1.546f,CHANNEL_CENTER);
+		Z(0,61,"EngineAccel06_z2.wav",12,107,LoopAtWill,324,35476,1.546f,CHANNEL_RIGHT);
+		Z(0,62,"MchGunFire01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,62,"MchGunFire01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,63,"MchGunFire02_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,63,"MchGunFire02_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,64,"MchGunFire03_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,64,"MchGunFire03_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,65,"MchGunFire04_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,65,"MchGunFire04_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,66,"MchGunFire05_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,66,"MchGunFire05_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,67,"MchGunFire06_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,67,"MchGunFire06_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,68,"MchGunMisfire01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,69,"MchGunJam01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,70,"AutoCanonJam01_z0.wav",12,59,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,70,"AutoCanonJam01_z1.wav",60,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,71,"MissileJam01_z0.wav",12,59,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,71,"MissileJam01_z1.wav",60,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,72,"MchGunFireExt01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,73,"ProjectileLoading01.wav",12,107,LoopAtWill,0,44198,1.253f,CHANNEL_CENTER);
+		Z(0,74,"IncomingAlarm01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,75,"ProjectileLoaded01_z0.wav",12,59,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,75,"ProjectileLoaded01_z1.wav",60,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,76,"EngineAccel07_z0.wav",12,107,LoopAtWill,356,49750,0.000f,CHANNEL_LEFT);
+		Z(0,76,"EngineAccel07_z1.wav",12,107,LoopAtWill,199,44095,0.000f,CHANNEL_CENTER);
+		Z(0,76,"EngineAccel07_z2.wav",12,107,LoopAtWill,356,49750,0.000f,CHANNEL_RIGHT);
+		Z(0,78,"BasicBeep01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,79,"BasicClick01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,80,"DefaultButton01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,81,"DuckServo01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,82,"MapZoom01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,82,"MapZoom01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(0,83,"ProgramButton01.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
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+		Z(1,114,"Translocate01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(1,115,"Death01_z0.wav",12,36,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(1,115,"Death01_z1.wav",12,36,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(1,115,"Death01_z2.wav",12,36,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(1,115,"Death01_z3.wav",12,36,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(1,115,"Death01_z4.wav",38,60,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(1,115,"Death01_z5.wav",38,60,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(1,115,"Death01_z6.wav",38,60,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(1,115,"Death01_z7.wav",38,60,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(1,115,"Death01_z8.wav",62,84,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(1,115,"Death01_z9.wav",62,84,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(1,115,"Death01_z10.wav",62,84,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(1,115,"Death01_z11.wav",62,84,LoopAtWill,0,89715,0.000f,CHANNEL_RIGHT);
+		Z(1,115,"Death01_z12.wav",86,107,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(1,115,"Death01_z13.wav",86,107,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(1,115,"Death01_z14.wav",86,107,LoopAtWill,288,13743,0.000f,CHANNEL_LEFT);
+		Z(1,115,"Death01_z15.wav",86,107,LoopAtWill,288,13743,0.000f,CHANNEL_RIGHT);
+		Z(1,116,"EngineWindUp01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_LEFT);
+		Z(1,116,"EngineWindUp01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_RIGHT);
+		Z(1,117,"Crunch01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,117,"Crunch01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,117,"Crunch01_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,118,"Crunch01LOD2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,119,"AuxExplosion01_z0.wav",12,36,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,119,"AuxExplosion01_z1.wav",12,36,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,119,"AuxExplosion01_z2.wav",38,60,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,119,"AuxExplosion01_z3.wav",38,60,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,119,"AuxExplosion01_z4.wav",62,84,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,119,"AuxExplosion01_z5.wav",62,84,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,119,"AuxExplosion01_z6.wav",86,107,LoopAtWill,23517,23865,0.000f,CHANNEL_CENTER);
+		Z(1,119,"AuxExplosion01_z7.wav",86,107,LoopAtWill,0,47104,0.000f,CHANNEL_CENTER);
+		Z(1,120,"AuxExplosion01LOD2_z0.wav",12,36,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,120,"AuxExplosion01LOD2_z1.wav",38,60,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,120,"AuxExplosion01LOD2_z2.wav",62,84,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,120,"AuxExplosion01LOD2_z3.wav",86,107,LoopAtWill,0,47104,0.000f,CHANNEL_CENTER);
+		Z(1,123,"AllWarning_z0.wav",12,107,LoopAtWill,0,12128,0.000f,CHANNEL_CENTER);
+		Z(1,123,"AllWarning_z1.wav",12,107,LoopAtWill,15,11068,0.000f,CHANNEL_CENTER);
+		Z(1,123,"AllWarning_z2.wav",12,107,LoopAtWill,12,7230,0.000f,CHANNEL_CENTER);
+		Z(1,123,"AllWarning_z3.wav",12,107,LoopAtWill,0,11376,0.000f,CHANNEL_CENTER);
+		Z(1,123,"AllWarning_z4.wav",12,107,LoopAtWill,0,13488,0.000f,CHANNEL_CENTER);
+		Z(1,123,"AllWarning_z5.wav",12,107,LoopAtWill,0,24176,0.000f,CHANNEL_CENTER);
+		Z(1,123,"AllWarning_z6.wav",12,107,LoopAtWill,0,5824,0.000f,CHANNEL_CENTER);
+		Z(1,124,"AllDamage.wav",12,107,LoopAtWill,40,21948,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z0.wav",12,107,LoopAtWill,0,77812,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z1.wav",12,107,LoopAtWill,0,89715,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z2.wav",12,107,LoopAtWill,0,89802,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z3.wav",12,107,LoopAtWill,0,39296,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z4.wav",12,107,LoopAtWill,0,61312,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z5.wav",12,107,LoopAtWill,0,33088,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z6.wav",12,107,LoopAtWill,0,47104,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z7.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z8.wav",12,107,LoopAtWill,0,40192,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z9.wav",12,107,LoopAtWill,0,30207,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z10.wav",12,107,LoopAtWill,0,27392,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z11.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z12.wav",12,107,LoopAtWill,0,26816,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z13.wav",12,107,LoopAtWill,67,29433,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z14.wav",12,107,LoopAtWill,406,47492,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z15.wav",12,107,LoopAtWill,194,52869,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z16.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z17.wav",12,107,LoopAtWill,0,11072,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z18.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z19.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z20.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z21.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z22.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z23.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,125,"AllExplosion_z24.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,126,"TorsoStop01_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,126,"TorsoStop01_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,127,"AllHits_z0.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,127,"AllHits_z1.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,127,"AllHits_z2.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,127,"AllHits_z3.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,127,"AllHits_z4.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,127,"AllHits_z5.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,127,"AllHits_z6.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+		Z(1,127,"AllHits_z7.wav",12,107,ForceStatic,0,0,0.000f,CHANNEL_CENTER);
+	}
+} s_audioPresetInit;
+}
diff --git a/game/reconstructed/btl4app.cpp b/game/reconstructed/btl4app.cpp
index 88efd1a..2f4a5c2 100644
--- a/game/reconstructed/btl4app.cpp
+++ b/game/reconstructed/btl4app.cpp
@@ -266,22 +266,35 @@ BTL4Application::SharedData
 		char *front_card = getenv(AWE_FRONT_ENV_VAR);	// FUN_004dee74
 		char *rear_card  = getenv(AWE_REAR_ENV_VAR);
 
-		if (front_card == NULL || rear_card == NULL)
+		// AUTHENTIC 1995 gate: the pod carried TWO AWE32 cards (front/rear) and
+		// audio was OFF unless both AWE_FRONT/AWE_REAR were set.  Those cards don't
+		// exist on modern hardware, so this check silenced audio on every machine
+		// (root cause of "no sound" -- the renderer was never created).
+		// MODERNIZED (task #50, 2026-07-15): default audio ON through the WinTesla
+		// OpenAL renderer (the OS default output device).  BT_NO_AUDIO=1 restores
+		// the silent/no-renderer behavior; the AWE vars still force it on too.
+		(void)front_card; (void)rear_card;
+		if (getenv("BT_NO_AUDIO"))
 		{
 			return NULL;
 		}
 
 		//
-		// FUN_0044e19c read the sample rate as a float out of the division
-		// parameter block (@+0x10).  In WinTesla that block is the public
-		// L4Application::divisionParameters char*; fall back to 1000.0f (the
-		// RP default) when it is absent.  Second arg is the mission-review
-		// flag (the 1995 binary hard-coded it off; DAT_004fd550 == 0).
+		// AUDIO CLOCK RATE (AUDIO_FIDELITY.md KB correction): FUN_0044e19c is
+		// ApplicationManager::GetFrameRate() -- the ORIGINAL audio "frames" were
+		// system CLOCK TICKS (the DOS 18.2/28 Hz timer), not a sample rate.  The
+		// old port read a float from divisionParameters+0x10 (a raw 1995-layout
+		// offset = garbage, -1.6e14 measured).  The Windows equivalent of the
+		// original semantic is the system tick rate: AudioHead::Execute stamps
+		// audioFrameCount from SystemClock ticks, so calibrating the renderer to
+		// the same tick rate keeps every AudioTime conversion unit-consistent.
 		//
-		RendererRate sample_rate =
-			divisionParameters
-				? (RendererRate)*reinterpret_cast<float*>(divisionParameters + 0x10)
-				: (RendererRate)1000.0f;
+		long ticks_per_second = SystemClock::GetTicksPerSecond();
+		if (ticks_per_second <= 0) ticks_per_second = 1000;	// GetTickCount ms (static not yet measured)
+		RendererRate sample_rate = (RendererRate)ticks_per_second;
+		if (getenv("BT_AUDIO_LOG"))
+			DEBUG_STREAM << "[audio] renderer calibration rate=" << sample_rate
+				<< " (SystemClock ticks/sec)" << "\n" << std::flush;
 
 		return
 			new BTL4AudioRenderer(
diff --git a/game/reconstructed/btl4gau2.cpp b/game/reconstructed/btl4gau2.cpp
index 9fb51f1..ace13f7 100644
--- a/game/reconstructed/btl4gau2.cpp
+++ b/game/reconstructed/btl4gau2.cpp
@@ -1411,6 +1411,21 @@ void SubsystemCluster::Execute()
 		failedState = (BTSubsystemDamageLevelOf(subsystem) >= 1.0f);
 	}
 
+	if (getenv("BT_TEMPBAR_LOG"))
+	{
+		Scalar *t  = (Scalar *)AttributePointerOf(subsystem, "CurrentTemperature");
+		Scalar *dg = (Scalar *)AttributePointerOf(subsystem, "DegradationTemperature");
+		Scalar *fl = (Scalar *)AttributePointerOf(subsystem, "FailureTemperature");
+		static int s_tbN = 0;
+		if (t != 0 && ((++s_tbN) % 30) == 0)
+			DEBUG_STREAM << "[tempbar] cluster EXECUTING "
+				<< (subsystem ? ((Subsystem *)subsystem)->GetName() : "?")
+				<< " T=" << *t
+				<< " degT=" << (dg ? *dg : -1.0f)
+				<< " failT=" << (fl ? *fl : -1.0f)
+				<< " drawState=" << GetDrawState() << "\n" << std::flush;
+	}
+
 	int state = GetDrawState();
 	if (state != previousDrawState)
 	{
diff --git a/game/reconstructed/btl4mppr.cpp b/game/reconstructed/btl4mppr.cpp
index 66baf62..85c9051 100644
--- a/game/reconstructed/btl4mppr.cpp
+++ b/game/reconstructed/btl4mppr.cpp
@@ -244,11 +244,31 @@ static void
 //#############################################################################
 // Shared Data Support
 //
+// TargetRangeExponent -> the live @0x1a4 zoom member (AUDIO_FIDELITY.md F20):
+// the authored AudioScalarDeltaTrigger blips per zoom step; it bound NULL until
+// this publication.  Chained to MechControlsMapper's dense index.
+const L4MechControlsMapper::IndexEntry
+	L4MechControlsMapper::AttributePointers[]=
+{
+	ATTRIBUTE_ENTRY(L4MechControlsMapper, TargetRangeExponent, targetRangeExponent)	// @0x1a4
+};
+
+L4MechControlsMapper::AttributeIndexSet&
+	L4MechControlsMapper::GetAttributeIndex()
+{
+	static L4MechControlsMapper::AttributeIndexSet attributeIndex(
+		ELEMENTS(L4MechControlsMapper::AttributePointers),
+		L4MechControlsMapper::AttributePointers,
+		MechControlsMapper::GetAttributeIndex()
+	);
+	return attributeIndex;
+}
+
 L4MechControlsMapper::SharedData
 	L4MechControlsMapper::DefaultData(
 		L4MechControlsMapper::GetClassDerivations(),
 		L4MechControlsMapper::GetMessageHandlers(),
-		L4MechControlsMapper::GetAttributeIndex(),	// inherited from MechControlsMapper
+		L4MechControlsMapper::GetAttributeIndex(),	// own table -> chained to MechControlsMapper
 		L4MechControlsMapper::StateCount
 	);
 
@@ -349,7 +369,12 @@ L4MechControlsMapper::MessageHandlerSet&
 		//
 		// (1) Full-throttle detent.
 		//
-		if (Abs(throttlePosition - 1.0f) <= 0.05f)		// _DAT_004d1ac0 / _DAT_004d1ac4
+		// NB: the Abs() macro (STYLE.H:118) is unparenthesized -- Abs(throttlePosition
+		// - 1.0f) mis-expands to -(throttlePosition + 1.0f) on the false branch (always,
+		// since throttle <= 1), which is <= 0.05 UNCONDITIONALLY -> the detent used to
+		// snap throttle to full every frame.  Diff into a temp so the macro sees one token.
+		const Scalar _thrOff = throttlePosition - 1.0f;
+		if (((_thrOff < 0.0f) ? -_thrOff : _thrOff) <= 0.05f)		// _DAT_004d1ac0 / _DAT_004d1ac4
 		{
 			throttlePosition = 1.0f;					// @0x11c
 		}
diff --git a/game/reconstructed/btl4mppr.hpp b/game/reconstructed/btl4mppr.hpp
index ebf81b4..e6a15cf 100644
--- a/game/reconstructed/btl4mppr.hpp
+++ b/game/reconstructed/btl4mppr.hpp
@@ -159,6 +159,20 @@
 		);
 		~L4MechControlsMapper();				// @004d1814
 
+	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+	// Attribute Support (AUDIO_FIDELITY.md F20): the authored zoom-blip
+	// AudioScalarDeltaTrigger binds ControlsMapper/TargetRangeExponent -- the
+	// live @0x1a4 member that slews every frame.  Chained to the parent index;
+	// Thrustmaster/RIO inherit this accessor.
+	//
+	public:
+		enum {
+			TargetRangeExponentAttributeID = MechControlsMapper::NextAttributeID,
+			L4NextAttributeID
+		};
+		static const IndexEntry AttributePointers[];
+		static AttributeIndexSet& GetAttributeIndex();
+
 	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 	// Protected data  (object grows to >= 0x1bc)
 	//
diff --git a/game/reconstructed/btl4rdr.cpp b/game/reconstructed/btl4rdr.cpp
index f6d4faf..4d2c360 100644
--- a/game/reconstructed/btl4rdr.cpp
+++ b/game/reconstructed/btl4rdr.cpp
@@ -697,9 +697,16 @@ void
 				// Top-down: keep heading only.  Extract the yaw, build a
 				// yaw-only quaternion, SET the rotation block from it.
 				//
-				EulerAngles euler;
-				euler = *currentAngularPointer;						// FUN_0040954c
-				Scalar heading = euler.yaw * HeadingHalf;			// * 0.5f
+				YawPitchRoll euler;									// FIX: YawPitchRoll (yaw-first),
+				euler = *currentAngularPointer;						// not EulerAngles -- the latter folds
+				Scalar heading = (Scalar)euler.yaw * HeadingHalf;	// at +/-pi under yaw.  * 0.5f half-angle
+				if (getenv("BT_RADAR_LOG")) {
+					EulerAngles oldE; oldE = *currentAngularPointer;	// old buggy path, A/B
+					static int s_rv = 0;
+					if ((s_rv++ % 20) == 0)
+						DEBUG_STREAM << "[radar-view] euler.yaw=" << (Scalar)oldE.yaw
+							<< " ypr.yaw=" << (Scalar)euler.yaw << " (rad)\n" << std::flush;
+				}
 				SinCosPair sc;
 				sc = Radian(heading);								// FUN_00408328
 				Quaternion yaw(0.0f, sc.sine, 0.0f, sc.cosine);		// FUN_00409948
@@ -965,12 +972,25 @@ void
 			Scalar sinH = 0.0f, cosH = 1.0f;
 			if (currentAngularPointer != NULL)
 			{
-				EulerAngles e;
-				e = *currentAngularPointer;			// Quaternion -> EulerAngles (operator=)
+				// FIX (user-reported: radar rotation flops every 180deg): the MUNGA
+				// EulerAngles(Quaternion) decomposition is AMBIGUOUS for a yawing mech --
+				// as yaw sweeps past +/-pi the quaternion double-cover flips it onto a
+				// pitch=roll=pi branch, so euler.yaw REVERSES (the radar spins back).
+				// YawPitchRoll applies yaw FIRST -> a clean continuous 360deg heading.
+				// Same fix the compass HeadingPointer already uses (btl4gaug.cpp:2185).
+				YawPitchRoll ypr;
+				ypr = *currentAngularPointer;
 				SinCosPair scH;
-				scH = Radian(e.yaw);				// FUN_00408328
+				scH = Radian((Scalar)ypr.yaw);
 				sinH = scH.sine;
 				cosH = scH.cosine;
+				if (getenv("BT_RADAR_LOG")) {
+					EulerAngles e; e = *currentAngularPointer;	// old (buggy) path, for A/B
+					static int s_rn = 0;
+					if ((s_rn++ % 20) == 0)
+						DEBUG_STREAM << "[radar] euler.yaw=" << (Scalar)e.yaw
+							<< " ypr.yaw=" << (Scalar)ypr.yaw << " (rad)\n" << std::flush;
+				}
 			}
 			Scalar rx =  delta.x * cosH + delta.z * sinH;
 			Scalar rz = -delta.x * sinH + delta.z * cosH;
diff --git a/game/reconstructed/btl4vid.cpp b/game/reconstructed/btl4vid.cpp
index 66f8deb..d7a384c 100644
--- a/game/reconstructed/btl4vid.cpp
+++ b/game/reconstructed/btl4vid.cpp
@@ -227,9 +227,43 @@ void
 			// to terrain).
 			{
 				extern Entity *gBTTerrainEntity;
+				// The boresight ground/structure pick needs a non-null world Entity to
+				// cite in mech+0x388 (the geometry rides in the pick POINT; the entity is
+				// only the non-mech designation -- the decomp's HudSimulation handles a
+				// target with no damage-zone table, part_013.c:5620).  Previously this
+				// required a TERRAIN-derived entity, but maps whose world geometry is
+				// buildings/cultural/props (class-42, NOT Terrain-derived) captured
+				// nothing -> gBTTerrainEntity stayed 0 -> the ground pick was skipped
+				// (mech4.cpp:4372) -> only mechs were targetable/firable (task #50
+				// regression: LAST.EGG rewrite lost its Terrain entity).  This `default`
+				// case is world-geometry ONLY (mechs route elsewhere), so capture the
+				// first entity reaching it -- preferring a real Terrain, else any world
+				// entity (building/prop/landmark) as the non-mech pick sentinel.
 				if (gBTTerrainEntity == 0
-					&& entity->IsDerivedFrom(*Terrain::GetClassDerivations()))
-					gBTTerrainEntity = entity;
+					|| !gBTTerrainEntity->IsDerivedFrom(*Terrain::GetClassDerivations()))
+				{
+					if (entity->IsDerivedFrom(*Terrain::GetClassDerivations()))
+						gBTTerrainEntity = entity;			// prefer a true Terrain entity
+					else if (gBTTerrainEntity == 0)
+						gBTTerrainEntity = entity;			// else the first world entity
+				}
+				// CENSUS: what world-geometry entities does the RENDER tree walk?
+				// (the garages/structures may be here even if not in the map's class-42
+				// instance stream that BuildTables reads.)
+				if (getenv("BT_GROUND_LOG"))
+				{
+					Derivation *dv = entity->GetClassDerivations();
+					const int isTer = entity->IsDerivedFrom(*Terrain::GetClassDerivations())?1:0;
+					const Point3D &ep = entity->localOrigin.linearPosition;
+					// tag NON-terrain entities distinctly -- these are the structures
+					// (garages/walls/props); log their world XZ so we can spawn beside
+					// one and confirm it is a collision solid the boresight now hits.
+					DEBUG_STREAM << (isTer ? "[rendent]" : "[rendent-STRUCT]")
+						<< " class='" << (dv && dv->className ? dv->className : "?")
+						<< "' terrain=" << isTer
+						<< " pos=(" << ep.x << "," << ep.y << "," << ep.z << ")"
+						<< "\n" << std::flush;
+				}
 			}
 			DPLRenderer::MakeEntityRenderables(
 				entity, model_resource, view_type);
@@ -1868,7 +1902,12 @@ BTReticleRenderable *BTBuildReticle(Entity *mech)
 			2, 3,
 			(int *)wp->SimulationStatePtr(),		// attr 1: damage state (1 = destroyed)
 			1,
-			1 /* Front group (RearFiring==0 on every BLH weapon) */);
+			// (task #68) the AUTHENTIC pip group: the binary registration reads
+			// the weapon's RearFiring attr and passes group 1 (front) / 2 (rear)
+			// (part_014.c:5429-5434) -- the reticle draws the group matching
+			// the current look view (mech reticleElementMask low bits).  The
+			// old hardcoded 1 rode the disproven "no BLH weapon is rear" belief.
+			wp->GetRearFiring() ? 2 : 1);
 	}
 	DEBUG_STREAM << "[hud] reticle built: " << gBTReticle->WeaponCount()
 				 << " weapon pip(s) registered\n" << std::flush;
diff --git a/game/reconstructed/btstubs.cpp b/game/reconstructed/btstubs.cpp
index 81fa1f5..f4d9daa 100644
--- a/game/reconstructed/btstubs.cpp
+++ b/game/reconstructed/btstubs.cpp
@@ -48,9 +48,10 @@
 // Default 1.0 so the mech-age divide in mech.cpp does not divide by zero.
 Scalar FrameTimeScale = 1.0f;
 
-// TODO(bring-up): audio preset bank table (real data lives in WTPresets/L4AUDLVL).
-// Zero-initialised -> PRESET_isImplemented() returns false (no presets) at boot.
-PRESETINFO allPresets[2][100] = {};
+// Audio preset bank table -- NOW DEFINED in audiopresets.cpp (241 presets generated
+// from the AWE32 SoundFonts AUDIO1/2.RES by scratchpad/sf2extract.py, task #50
+// 2026-07-15).  The old zero-init stub here (PRESET_isImplemented -> false -> silent)
+// is replaced by the real bank/preset->sample map.
 
 //===========================================================================//
 // BattleTech globals (status-message pool + hand-rolled vtable pointers the
@@ -397,3 +398,8 @@ void VideoComponent::ReceiveControl(VideoControlID /*control_ID*/, Scalar /*cont
 void VideoComponent::Execute()
 {
 }
+
+// DIAG (audio footstep chain): the live &mech->footStep, exported so the
+// engine watcher poll can trace THE footstep watcher without per-run pointers.
+void *g_btFootStepAddr = 0;
+void *g_btAccelAddr = 0;	// DIAG: watcher-poll tracer on the LocalAcceleration attr
diff --git a/game/reconstructed/btvisgnd.cpp b/game/reconstructed/btvisgnd.cpp
index 55ec007..df527df 100644
--- a/game/reconstructed/btvisgnd.cpp
+++ b/game/reconstructed/btvisgnd.cpp
@@ -53,6 +53,7 @@ struct VgMesh
 {
 	std::vector<VgTri> tris;
 	float minx, maxx, minz, maxz;		// model-local XZ bound
+	float miny, maxy;					// model-local Y bound (dome vs flat-ground test)
 };
 
 struct VgInst
@@ -89,8 +90,8 @@ int LoadMeshFor(const char *resource_name)
 	if (LoadBgfFile(file, data) && data.ok && !data.indices.empty())
 	{
 		VgMesh m;
-		m.minx = m.minz = 1e9f;
-		m.maxx = m.maxz = -1e9f;
+		m.minx = m.minz = m.miny = 1e9f;
+		m.maxx = m.maxz = m.maxy = -1e9f;
 		// The loader emits DOUBLE-SIDED triangles: emitTri pushes (a,b,c) then
 		// (a,c,b) -- 6 indices per source triangle.  Take the forward one.
 		for (size_t i = 0; i + 5 < data.indices.size(); i += 6)
@@ -100,17 +101,33 @@ int LoadMeshFor(const char *resource_name)
 			const BgfVtx &C = data.verts[data.indices[i + 2]];
 			VgTri t = { A.x, A.y, A.z, B.x, B.y, B.z, C.x, C.y, C.z };
 			m.tris.push_back(t);
-			float xs[3] = { A.x, B.x, C.x }, zs[3] = { A.z, B.z, C.z };
+			float xs[3] = { A.x, B.x, C.x }, zs[3] = { A.z, B.z, C.z }, ys[3] = { A.y, B.y, C.y };
 			for (int k = 0; k < 3; ++k)
 			{
 				if (xs[k] < m.minx) m.minx = xs[k];
 				if (xs[k] > m.maxx) m.maxx = xs[k];
 				if (zs[k] < m.minz) m.minz = zs[k];
 				if (zs[k] > m.maxz) m.maxz = zs[k];
+				if (ys[k] < m.miny) m.miny = ys[k];
+				if (ys[k] > m.maxy) m.maxy = ys[k];
 			}
 		}
 		if (!m.tris.empty())
 		{
+			if (getenv("BT_GROUND_LOG"))
+			{
+				float miny = 1e9f, maxy = -1e9f;
+				for (size_t j = 0; j < m.tris.size(); ++j)
+				{
+					const VgTri &t = m.tris[j];
+					const float ys[3] = { t.ay, t.by, t.cy };
+					for (int k = 0; k < 3; ++k)
+					{ if (ys[k] < miny) miny = ys[k]; if (ys[k] > maxy) maxy = ys[k]; }
+				}
+				DEBUG_STREAM << "[visgnd] mesh '" << key << "' tris=" << m.tris.size()
+					<< " x[" << m.minx << "," << m.maxx << "] z[" << m.minz << "," << m.maxz
+					<< "] y[" << miny << "," << maxy << "]\n" << std::flush;
+			}
 			gMeshes.push_back(m);
 			idx = (int)gMeshes.size() - 1;
 		}
@@ -151,16 +168,44 @@ bool BuildTables()
 		const float *pos = (const float *)(base + p + 48);
 		p += (mlen + 3) & ~3u;
 
+		// CENSUS (BT_GROUND_LOG): log EVERY map entity's class + name, so we can see
+		// what class the garages/structures are (the class-42 filter may drop them).
+		if (getenv("BT_GROUND_LOG"))
+		{
+			ResourceDescription *crd = rf->FindResourceDescription(rid);
+			DEBUG_STREAM << "[mapent] cls=" << cls << " mflags=" << mflags
+				<< " name='" << (crd ? crd->resourceName : "?") << "'\n" << std::flush;
+		}
 		if (mflags & 0x2) continue;			// include marker
 		if (cls != 42) continue;			// terrain/static cultural only
 
 		ResourceDescription *rd = rf->FindResourceDescription(rid);
 		if (rd == 0) continue;
-		if (SkippedName(rd->resourceName)) { ++skipped; continue; }
 
 		int mi = LoadMeshFor(rd->resourceName);
 		if (mi < 0) { ++skipped; continue; }
 
+		// GEOMETRY-AWARE skip: the name filter (sky/backdrop) is right for a high
+		// vertical DOME, but arena1's ground is a 10000x10000 FLAT plane at y=0
+		// misnamed "sky" -- name-skipping it removed the only groundable geometry
+		// (task #50: buildings/ground stopped moving the range axis).  Keep a
+		// name-skipped mesh IF it is a wide, near-flat, near-ground plane (the
+		// arena floor); still skip true domes / tall vertical backdrops.
+		if (SkippedName(rd->resourceName))
+		{
+			const VgMesh &gm = gMeshes[mi];
+			const float yext = gm.maxy - gm.miny;
+			const float xext = gm.maxx - gm.minx, zext = gm.maxz - gm.minz;
+			const bool flatWideGround =
+				(yext < 200.0f) && (xext > 500.0f) && (zext > 500.0f) && (gm.miny < 200.0f);
+			if (getenv("BT_GROUND_LOG"))
+				DEBUG_STREAM << "[visgnd] name-skip '" << rd->resourceName
+					<< "' yext=" << yext << " xz=" << xext << "x" << zext
+					<< " miny=" << gm.miny << " -> keepAsGround=" << (flatWideGround?1:0)
+					<< "\n" << std::flush;
+			if (!flatWideGround) { ++skipped; continue; }
+		}
+
 		VgInst inst;
 		inst.mesh = mi;
 		inst.px = pos[0]; inst.py = pos[1]; inst.pz = pos[2];
diff --git a/game/reconstructed/emitter.cpp b/game/reconstructed/emitter.cpp
index de496e9..aa0d31d 100644
--- a/game/reconstructed/emitter.cpp
+++ b/game/reconstructed/emitter.cpp
@@ -271,6 +271,15 @@ void
 	Scalar dist = (Scalar)Sqrt(delta.x*delta.x + delta.y*delta.y + delta.z*delta.z);	// FUN_004dd138
 	beamScale.z = dist / graphicLength;					// 0x434 (== beamScale[2]) = dist / 0x438
 
+	if (getenv("BT_FIRE_LOG"))
+	{
+		Entity *st = (owner != 0) ? *(Entity **)((char *)owner + 0x388) : 0;
+		DEBUG_STREAM << "[fireW] " << GetName() << " dist=" << (float)dist
+			<< " effRange=" << (float)effectiveRange
+			<< " inRange=" << (int)(dist <= effectiveRange)
+			<< " explID=" << (long)GetExplosionResourceID()
+			<< " tgt=" << (void *)st << "\n" << std::flush;
+	}
 	if (dist <= effectiveRange)							// this+0x328
 	{
 		// THE AUTHENTIC DAMAGE SUBMISSION (task #8; binary @004bace8:7758-7764):
@@ -349,6 +358,7 @@ void
 				<< " pct=" << (float)rechargeLevel
 				<< " tgt=" << (void *)((owner != 0)
 					? *(Entity **)((char *)owner + 0x388) : 0)
+				<< " explID=" << (long)GetExplosionResourceID()
 				<< std::endl;
 	}
 	targetWithinRange = UpdateTargeting();				// @004b9bdc -> this+0x34c
@@ -380,7 +390,7 @@ void
 	case 2:		// Loaded -- ready; fire on the trigger's rising edge
 		if (fireEdge)
 		{
-			if (useConfiguredPip && HasActiveTarget())	// this+0x3E0 (Loaded->Firing gate) && entity+0x388
+			if (viewFireEnable && HasActiveTarget())	// this+0x3E0 (Loaded->Firing gate: enabled in the CURRENT look view) && entity+0x388
 			{
 				weaponAlarm.SetLevel(0);				// -> Firing
 				FireWeapon();							// (*vtable+0x48)()
@@ -823,8 +833,8 @@ Emitter::Emitter(
 	}
 
 	// (E4 removed) the former `firingArmed = 1` wrote this+0x3e8 == MechWeapon::recoil,
-	// NOT the Loaded->Firing gate: the binary gate reads useConfiguredPip@0x3E0 (set by
-	// the MechWeapon ctor from usesExternalModel), so no separate arming is needed.
+	// NOT the Loaded->Firing gate: the binary gate reads viewFireEnable@0x3E0 (set by
+	// the MechWeapon ctor / the look-state commit), so no separate arming is needed.
 	weaponAlarm.SetLevel(3);							// Loading
 	beamEndpoint    = Point3D(0.0f, 0.0f, 0.0f);		// 0x460 <- (0,0,0)
 	beamFlag        = 0;								// 0x46c
diff --git a/game/reconstructed/emitter.hpp b/game/reconstructed/emitter.hpp
index be61119..8559302 100644
--- a/game/reconstructed/emitter.hpp
+++ b/game/reconstructed/emitter.hpp
@@ -308,7 +308,7 @@ class NotationFile;
 		//   * beamHitPoint/beamImpact/beamImpactScalar -> binary writes into the inherited
 		//     Damage damageData (0x3C8/0x3B0/0x3AC); the recon assignments were dead -> deleted
 		//   * beamColor       -> never read (WriteUpdateRecord builds colour from targetEntity)
-		//   * firingArmed     -> the Loaded->Firing gate reads inherited useConfiguredPip@0x3E0
+		//   * firingArmed     -> the Loaded->Firing gate reads inherited viewFireEnable@0x3E0
 		//   * energyRampTime  -> binary writes the base slot voltageScale@0x310; recon computes a local
 		//   * beamLengthRatio -> is beamScale.z@0x434
 		int		seekVoltageIndex;			// @0x3F0  (param_1[0xfc]) current charge-curve index
diff --git a/game/reconstructed/heat.cpp b/game/reconstructed/heat.cpp
index e79fcd4..5bd5c62 100644
--- a/game/reconstructed/heat.cpp
+++ b/game/reconstructed/heat.cpp
@@ -80,6 +80,37 @@ static const Scalar CoolantDrawFloor    = 0.0025f;	// _DAT_0050e3d8 (zero floor
 static const Scalar CoolantActiveOn     = 0.003f;	// _DAT_0050e3d4 (ON threshold)
 
 
+//###########################################################################
+// GaugeAlarm54 watcher sockets.  The binary's 0x54 alarm (FUN_0041b9ec) IS a
+// StateIndicator -- its three sub-indicators @0x18/0x2c/0x40 are the audio/
+// video/gauge watcher chains, level@0x14 is currentState.  These out-of-line
+// bodies let an AudioStateWatcher bind to any subsystem alarm BY NAME
+// (GeneratorState / CondenserState / ReservoirState / ...); SetLevel fires the
+// registered watchers on a level change, so the state audio plays on transition.
+// Empty sockets iterate to nothing, so alarms with no audio watchers are a no-op.
+//###########################################################################
+void GaugeAlarm54::AddAudioWatcher(Component *watcher)	{ audioWatcherSocket.Add(watcher); }
+void GaugeAlarm54::AddVideoWatcher(Component *watcher)	{ videoWatcherSocket.Add(watcher); }
+void GaugeAlarm54::AddGaugeWatcher(Component *watcher)	{ gaugeWatcherSocket.Add(watcher); }
+
+void GaugeAlarm54::NotifyWatchers()
+{
+	Component *watcher;
+	{
+		SChainIteratorOf<Component*> iterator(audioWatcherSocket);
+		while ((watcher = iterator.ReadAndNext()) != NULL) watcher->Execute();
+	}
+	{
+		SChainIteratorOf<Component*> iterator(videoWatcherSocket);
+		while ((watcher = iterator.ReadAndNext()) != NULL) watcher->Execute();
+	}
+	{
+		SChainIteratorOf<Component*> iterator(gaugeWatcherSocket);
+		while ((watcher = iterator.ReadAndNext()) != NULL) watcher->Execute();
+	}
+}
+
+
 //###########################################################################
 //###########################################################################
 //					HeatableSubsystem
@@ -236,6 +267,25 @@ int
 //#############################################################################
 // Shared Data Support
 //
+// CondenserState -> condenserAlarm (@0x1DC).  Chained to HeatSink so the inherited
+// coolant/temp attrs stay reachable; dense from HeatSink::NextAttributeID.
+const Condenser::IndexEntry
+	Condenser::AttributePointers[]=
+{
+	ATTRIBUTE_ENTRY(Condenser, CondenserState, condenserAlarm)	// @0x1DC (0x54 StateIndicator-compatible alarm)
+};
+
+Condenser::AttributeIndexSet&
+	Condenser::GetAttributeIndex()
+{
+	static Condenser::AttributeIndexSet attributeIndex(
+		ELEMENTS(Condenser::AttributePointers),
+		Condenser::AttributePointers,
+		HeatSink::GetAttributeIndex()
+	);
+	return attributeIndex;
+}
+
 Condenser::SharedData
 	Condenser::DefaultData(
 		Condenser::GetClassDerivations(),
@@ -367,7 +417,13 @@ const HeatSink::IndexEntry
 	ATTRIBUTE_ENTRY(HeatSink, DegradationPressure,    coolantEfficiency),		// @0x124
 	ATTRIBUTE_ENTRY(HeatSink, CoolantMassLeakRate,    coolantDraw),				// @0x130 (LeakGauge; damage-driven)
 	ATTRIBUTE_ENTRY(HeatSink, HeatSink,               linkedSinks),				// @0x164 (Eng linked-sink temp readout)
-	ATTRIBUTE_ENTRY(HeatSink, ValveSetting,           coolantFlowScale)			// @0x15C (condenser valve slider @2; init 1.0f)
+	ATTRIBUTE_ENTRY(HeatSink, ValveSetting,           coolantFlowScale),		// @0x15C (condenser valve slider @2; init 1.0f)
+	// (AUDIO_FIDELITY F6) the coolant-leak warning: binary id 12 @0x138 = the
+	// coolantActive leak flag (binary table @0x50e4c8; watchers match ==1/==0).
+	// PoweredSubsystem (weapons/sensor/myomers) DERIVES from HeatSink, so this
+	// single row serves ALL 19 authored leak watchers through the chained
+	// index -- exactly like the binary (one ReportLeak row in the image).
+	ATTRIBUTE_ENTRY(HeatSink, ReportLeak,             coolantActive)			// @0x138 (leak-active hysteresis flag)
 };
 
 HeatSink::AttributeIndexSet&
@@ -818,6 +874,15 @@ void
 		coolantDraw = 0.0f;
 	}
 
+	// DIAG (BT_COOL_LOG): fire whenever THIS heat subsystem carries any damage --
+	// answers "does damaging a mech drain its coolant?".  Shows the damageLevel the
+	// leak reads (@0xE0), the heat load, the resulting draw, and the live level.
+	if (getenv("BT_COOL_LOG") && zoneDamage > 0.001f)
+		DEBUG_STREAM << "[cool] " << GetName() << " dmg=" << zoneDamage
+			<< " heatLoad=" << heatLoad << " draw=" << coolantDraw
+			<< " coolantLevel=" << coolantLevel << "/" << thermalCapacity
+			<< "\n" << std::flush;
+
 	Scalar amount = coolantDraw * time_slice;
 	if (coolantLevel < amount)
 	{
diff --git a/game/reconstructed/heat.hpp b/game/reconstructed/heat.hpp
index bc3dbb3..8448fe7 100644
--- a/game/reconstructed/heat.hpp
+++ b/game/reconstructed/heat.hpp
@@ -39,6 +39,8 @@
 #include <average.hpp>			// AverageOf<T>
 #include <scalar.hpp>			// Scalar
 #include <alarm.hpp>			// GaugeAlarm
+#include <SCHAIN.hpp>			// SChainOf<Component*> (GaugeAlarm54 watcher sockets)
+class Component;				// fwd -- AddAudioWatcher(Component*) defined in heat.cpp
 
 #include <string.h>
 #include <stdlib.h>
@@ -91,26 +93,48 @@ class Mech;
 class GaugeAlarm54
 {
 public:
-	GaugeAlarm54(int levels = 0)	{ levelA = levelB = levels; level = 0; }
+	GaugeAlarm54(int levels = 0)
+		: audioWatcherSocket(0), videoWatcherSocket(0), gaugeWatcherSocket(0)
+		{ levelA = levelB = levels; level = 0; }
 	void	Initialize(int levels)	{ levelA = levelB = levels; level = 0; }
-	void	SetLevel(int n)			{ level = n; }
+	// StateIndicator::SetState semantics: oldState (levelB@0x10) := currentState
+	// BEFORE the change, so the audio watcher's StateChanged(oldState,newState) is
+	// correct -- this is what the inverse/STOP AudioStateTriggers key on (old_state ==
+	// firing/charging state) to StopNote a looping charge/sustain/loading sample when
+	// the weapon leaves that state.  (In the binary levelB@0x10 IS oldState; the
+	// weapon's LevelCountB() reading @0x10 is that same authentic oldState.)
+	void	SetLevel(int n)			{ levelB = level; if (n != level) { level = n; NotifyWatchers(); } }
 	int		GetLevel() const		{ return level; }
 	int		Level() const			{ return level; }
 	int		LevelCountB() const		{ return levelB; }	// +0x10 (the weapon update-record "reset" source)
 	// ReconAlarm/AlarmIndicator API aliases (callers that predate the retype use these):
-	void		SetState(unsigned n){ level = (int)n; }
+	void		SetState(unsigned n){ SetLevel((int)n); }
 	unsigned	GetState() const	{ return (unsigned)level; }
+	// The binary's 0x54 alarm (FUN_0041b9ec) IS a StateIndicator: its "three
+	// sub-indicators" @0x18/0x2c/0x40 are the audio/video/gauge watcher sockets,
+	// and level@0x14 is currentState.  So an AudioStateWatcher can bind to any
+	// subsystem alarm BY NAME (GeneratorState/CondenserState/ReservoirState/...) and
+	// AddAudioWatcher registers on the +0x18 socket; SetLevel fires it on change.
+	// (Defined out-of-line in heat.cpp so this header stays free of Component/iterator.)
+	void	AddAudioWatcher(Component *watcher);
+	void	AddVideoWatcher(Component *watcher);
+	void	AddGaugeWatcher(Component *watcher);
+private:
+	void	NotifyWatchers();		// fire audio/video/gauge watchers (empty sockets == no-op)
 protected:
-	// Interior mirrors FUN_0041b9ec: base GaugeAlarm header (+0x00), three count
-	// words at +0x0c/+0x10/+0x14, three sub-indicators at +0x18/+0x2c/+0x40.  The
-	// STATUS level the binary reads (HeatSink+0x184 == alarm+0x14, GetStatusFlags
-	// @004add30 / PrintState @004ae050) is param_1[5] at +0x14, so `level` lands
-	// there -- a raw `subsystem+0x184` read now returns GetLevel().
-	char	_hdr[0x0c];				// +0x00  base GaugeAlarm (vtable + FUN_004178cc header)
-	int		levelA;					// +0x0c  param_1[3] (level count)
-	int		levelB;					// +0x10  param_1[4]
-	int		level;					// +0x14  param_1[5] -- the status level (Normal/Deg/Fail)
-	char	_tail[0x54 - 0x18];		// +0x18  three sub-indicators to 0x54
+	// Interior mirrors FUN_0041b9ec / StateIndicator: base header (+0x00, a Node in
+	// the binary), three state words @+0x0c/+0x10/+0x14 (== stateCount/oldState/
+	// currentState), three watcher sockets @+0x18/+0x2c/+0x40.  level@+0x14 is the
+	// STATUS level the binary reads (HeatSink+0x184 == alarm+0x14).  levelB@+0x10 is
+	// left as the weapon "reset source" (LevelCountB) -- SetLevel does NOT touch it,
+	// so weapon alarms are unchanged; only the watcher sockets are now real.
+	char	_hdr[0x0c];				// +0x00  base header (vtable + FUN_004178cc header)
+	int		levelA;					// +0x0c  stateCount
+	int		levelB;					// +0x10  oldState slot / weapon LevelCountB
+	int		level;					// +0x14  currentState (status level)
+	SChainOf<Component*>	audioWatcherSocket;	// +0x18
+	SChainOf<Component*>	videoWatcherSocket;	// +0x2c
+	SChainOf<Component*>	gaugeWatcherSocket;	// +0x40
 };
 
 // The 8-byte modeling type kept ONLY for HUD::statusAlarm (still on the old
@@ -345,6 +369,14 @@ inline int
 			CoolantMassLeakRateAttributeID,		// @0x130 coolantDraw (damage-driven leak)
 			HeatSinkAttributeID,				// @0x164 linkedSinks (link to master sink)
 			ValveSettingAttributeID,			// @0x15C coolantFlowScale (condenser valve slider @2)
+			// (AUDIO_FIDELITY F6) the binary heat attribute table (16-byte rows
+			// {id, name, off+1, pad} @0x50e438..0x50e4c8, ids 3..12) confirms
+			// EVERY existing binding above [T1] and adds ReportLeak (id 12) ->
+			// +0x138 = coolantActive, the INT leak hysteresis flag UpdateCoolant
+			// (@004adbf8 [0x4e]) drives 1 above draw 0.003 / 0 below 0.0025.
+			// The authored Logical match watchers (19 subsystems, ==1 Start /
+			// ==0 Stop of the looped 3-note leak sequence) fire on it directly.
+			ReportLeakAttributeID,
 			NextAttributeID
 		};
 	private:
@@ -543,6 +575,22 @@ inline int
 		static Receiver::MessageHandlerSet& GetMessageHandlers();
 		static SharedData DefaultData;
 
+	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+	// Attribute Support -- audio binds an AudioStateWatcher to CondenserState;
+	// it resolves to condenserAlarm (@0x1DC, a 0x54 StateIndicator-compatible
+	// GaugeAlarm54).  RefrigerationSimulation SetLevel's it (2/1/0), so the
+	// condenser cycling audio fires on the flow-change pulse.  Chained to HeatSink.
+	//
+	public:
+		enum {
+			CondenserStateAttributeID = HeatSink::NextAttributeID,
+			NextAttributeID
+		};
+	private:
+		static const IndexEntry AttributePointers[];
+	public:
+		static AttributeIndexSet& GetAttributeIndex();
+
 	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 	// Test Class Support
 	//
diff --git a/game/reconstructed/heatfamily_reslice.cpp b/game/reconstructed/heatfamily_reslice.cpp
index 5fa2f1f..4931bfe 100644
--- a/game/reconstructed/heatfamily_reslice.cpp
+++ b/game/reconstructed/heatfamily_reslice.cpp
@@ -494,6 +494,25 @@ int
 //#############################################################################
 // Shared Data Support
 //
+// ReservoirState -> reservoirAlarm (@0x1D0).  Chained to HeatSink so the inherited
+// coolant/temp attrs stay reachable; dense from HeatSink::NextAttributeID.
+const Reservoir::IndexEntry
+	Reservoir::AttributePointers[]=
+{
+	ATTRIBUTE_ENTRY(Reservoir, ReservoirState, reservoirAlarm)	// @0x1D0 (0x54 StateIndicator-compatible alarm)
+};
+
+Reservoir::AttributeIndexSet&
+	Reservoir::GetAttributeIndex()
+{
+	static Reservoir::AttributeIndexSet attributeIndex(
+		ELEMENTS(Reservoir::AttributePointers),
+		Reservoir::AttributePointers,
+		HeatSink::GetAttributeIndex()
+	);
+	return attributeIndex;
+}
+
 Reservoir::SharedData
 	Reservoir::DefaultData(
 		Reservoir::GetClassDerivations(),
diff --git a/game/reconstructed/heatfamily_reslice.hpp b/game/reconstructed/heatfamily_reslice.hpp
index aec53ff..af79695 100644
--- a/game/reconstructed/heatfamily_reslice.hpp
+++ b/game/reconstructed/heatfamily_reslice.hpp
@@ -224,6 +224,19 @@
 		static Derivation	*GetClassDerivations();	// name "Reservoir"
 		static SharedData	DefaultData;
 
+		// Attribute Support -- audio binds an AudioStateWatcher to ReservoirState;
+		// it resolves to reservoirAlarm (@0x1D0, a 0x54 StateIndicator-compatible
+		// GaugeAlarm54; level@0x1e4 is the inject flag).  CoolantSimulation SetLevel's
+		// it, so the coolant-inject audio fires on the inject on/off transition.
+		enum {
+			ReservoirStateAttributeID = HeatSink::NextAttributeID,
+			NextAttributeID
+		};
+	private:
+		static const IndexEntry AttributePointers[];
+	public:
+		static AttributeIndexSet& GetAttributeIndex();
+
 		typedef Reservoir__SubsystemResource SubsystemResource;
 
 		typedef void
diff --git a/game/reconstructed/mech.cpp b/game/reconstructed/mech.cpp
index 0f71b33..6ed9e9c 100644
--- a/game/reconstructed/mech.cpp
+++ b/game/reconstructed/mech.cpp
@@ -539,6 +539,37 @@ Logical
 	return True;
 }
 
+//
+// World-STRUCTURE boresight pick.  Ray-test the zone's STATIC collision solid
+// tree (the world geometry -- garages, walls, props -- that the mech's walk
+// already collides against) along the boresight, and hand back the entry point
+// of the closest structure the ray strikes.  This is the authentic non-mech
+// world pick: Mover::FindStaticSolidHitBy is the "test against the static world"
+// tail of the engine's own FindBoxedSolidHitBy (MOVER.cpp), which is what the
+// mover-vs-world collision uses -- so a shot lands on EXACTLY the geometry that
+// blocks the walk (the user's "structures block the mech, but weapons don't").
+//
+// The ray is WORLD-space (the static tree is world-space, unlike a mech's local
+// collision template).  FindBoundingBoxHitBy clips the Line's length to the
+// entry distance (BoundingBox::HitByBounded -> line->length = enter), so
+// line->FindEnd yields the world entry point on the struck solid.
+//
+Logical
+	Mech::WorldStructurePick(const Point3D &start, const Vector3D &dir,
+							 Scalar max_range, Point3D *hit_world)
+{
+	Scalar dlen = (Scalar)Sqrt(dir.x*dir.x + dir.y*dir.y + dir.z*dir.z);
+	if (dlen < 1e-6f)
+		return False;
+	Line ray(start, UnitVector(dir.x/dlen, dir.y/dlen, dir.z/dlen), max_range);
+	BoxedSolid *solid = FindStaticSolidHitBy(&ray);		// static world only
+	if (solid == 0)
+		return False;
+	if (hit_world != 0)
+		ray.FindEnd(hit_world);							// clipped length -> entry point
+	return True;
+}
+
 //
 // The roster torso (sinkSourceSubsystem @0x438, ClassID 0xBC5) -- parity with
 // the binary's *(mech+0x438).
@@ -672,17 +703,17 @@ const Mech::IndexEntry
 	Mech::AttributePointers[]=
 {
 	ATTRIBUTE_ENTRY(Mech, MaxAcceleration,         attrPad),				// 0x15
-	ATTRIBUTE_ENTRY(Mech, CollisionState,          attrPad),				// 0x16
+	ATTRIBUTE_ENTRY(Mech, CollisionState,          collisionState),			// 0x16 real StateIndicator (audio impact/scrape watcher)
 	ATTRIBUTE_ENTRY(Mech, CollisionNormal,         attrPad),				// 0x17
-	ATTRIBUTE_ENTRY(Mech, CollisionSpeed,          attrPad),				// 0x18
+	ATTRIBUTE_ENTRY(Mech, CollisionSpeed,          collisionSpeed),		// 0x18 (F17: |impact velocity|, binary @0x4B4)
 	ATTRIBUTE_ENTRY(Mech, CollisionMaterialType,   attrPad),				// 0x19
 	ATTRIBUTE_ENTRY(Mech, CurrentSpeed,            legCycleSpeed),		// 0x1a (existing @0x348)
 	ATTRIBUTE_ENTRY(Mech, MaxRunSpeed,             reverseStrideLength),	// 0x1b (existing @0x34c = run/top speed)
 	ATTRIBUTE_ENTRY(Mech, EyepointRotation,        eyepointRotation),		// 0x1c (real member -- the eye reads it per frame)
 	ATTRIBUTE_ENTRY(Mech, TargetReticle,           targetReticle),		// 0x1d (real Reticle struct -- task #36)
-	ATTRIBUTE_ENTRY(Mech, FootStep,                attrPad),				// 0x1e
-	ATTRIBUTE_ENTRY(Mech, AnimationState,          attrPad),				// 0x1f
-	ATTRIBUTE_ENTRY(Mech, ReplicantAnimationState, attrPad),				// 0x20
+	ATTRIBUTE_ENTRY(Mech, FootStep,                footStep),				// 0x1e real pulse (AudioLogicalTrigger; one rising edge per foot plant)
+	ATTRIBUTE_ENTRY(Mech, AnimationState,          animationState),			// 0x1f real StateIndicator (audio state-watcher binds + AddAudioWatcher)
+	ATTRIBUTE_ENTRY(Mech, ReplicantAnimationState, replicantAnimationState),	// 0x20 real StateIndicator
 	ATTRIBUTE_ENTRY(Mech, LinearSpeed,             linearSpeed),			// 0x21 (live forward speed)
 	ATTRIBUTE_ENTRY(Mech, ClimbRate,               attrPad),				// 0x22
 	ATTRIBUTE_ENTRY(Mech, AccelerationLastFrame,   attrPad),				// 0x23
@@ -696,17 +727,21 @@ const Mech::IndexEntry
 	ATTRIBUTE_ENTRY(Mech, TestButton4,             attrPad),				// 0x2b
 	ATTRIBUTE_ENTRY(Mech, TestButton5,             attrPad),				// 0x2c
 	ATTRIBUTE_ENTRY(Mech, TestButton6,             attrPad),				// 0x2d
-	ATTRIBUTE_ENTRY(Mech, ReduceButton,            attrPad),				// 0x2e
+	ATTRIBUTE_ENTRY(Mech, ReduceButton,            reduceButton),		// 0x2e (F17: cab REDUCE, binary @0x340)
 	ATTRIBUTE_ENTRY(Mech, RadarRange,              radarRange),			// 0x2f (radar scale)
 	ATTRIBUTE_ENTRY(Mech, RadarLinearPosition,     radarLinearPosition),	// 0x30 (Point3D* -> localOrigin)
 	ATTRIBUTE_ENTRY(Mech, RadarAngularPosition,    radarAngularPosition),// 0x31 (Quaternion* -> localOrigin)
-	ATTRIBUTE_ENTRY(Mech, RearFiring,              attrPad),				// 0x32
+	ATTRIBUTE_ENTRY(Mech, RearFiring,              rearFiring),			// 0x32 (task #68: binary id 50 @0x410)
 	ATTRIBUTE_ENTRY(Mech, RequestDuckAnimation,    attrPad),				// 0x33
-	ATTRIBUTE_ENTRY(Mech, UnstablePercentage,      attrPad),				// 0x34
+	ATTRIBUTE_ENTRY(Mech, UnstablePercentage,      unstablePercentage),	// 0x34 (task #66: the instability alarm; binary id 52 @0x3F0)
 	ATTRIBUTE_ENTRY(Mech, SuperStop,               attrPad),				// 0x35
-	ATTRIBUTE_ENTRY(Mech, IncomingLock,            attrPad),				// 0x36
+	// (AUDIO_FIDELITY F7) real missile-alarm backing: binary ids 54/56 @0x3fc/
+	// 0x400 [T1 table @0x50c0b0/0x50c0d0]; the authored beeper (match 1/0) +
+	// tempo scale (range 100..800 -> tempo 600..10) read these.  Driven by
+	// Missile::MoveAndCollide via BTReportIncomingMissile (mech4.cpp).
+	ATTRIBUTE_ENTRY(Mech, IncomingLock,            incomingLock),		// 0x36
 	ATTRIBUTE_ENTRY(Mech, DuckState,               duckState),			// 0x37 (crouch posture, int)
-	ATTRIBUTE_ENTRY(Mech, DistanceToMissile,       attrPad)				// 0x38
+	ATTRIBUTE_ENTRY(Mech, DistanceToMissile,       distanceToMissile)	// 0x38
 };
 
 Mech::AttributeIndexSet&
@@ -818,8 +853,10 @@ Mech::Mech(
 
 	mechNameFilter.Initialize();						// FUN_00435a7c(this+0xdb)
 	masterAlarm   = AlarmIndicator(0x21);				// FUN_0041b9ec(this+0xe7,0x21)
-	stateFlags    = 0;									// Wword(0xff)
-	maxSpeed      = DAT_005209d0;						// FLT_MAX -> Wword(0x100)
+	rearFiring    = 0;									// (task #68) ORed from the weapons below
+	// (F7 correction) the binary's 0x400 = FLT_MAX init is DistanceToMissile's
+	// "no missile" far default (attr id 56), NOT a maxSpeed -- the old member
+	// is retired; distanceToMissile (init below) owns the slot's meaning.
 	Wword(0x104)   = 0;
 	Wword(0x106).Construct(0);							// FUN_004a4d60 (slot member)
 	Wword(0x10f).LinkTo(this + 0x61);					// FUN_00420ea4
@@ -870,14 +907,60 @@ Mech::Mech(
 								// dispatch (task #56) gates on it every frame; garbage
 								// nonzero silently disabled the writers until death anims ran
 	legResetLatch        = 0;	// @0x654 -- same latch family, same fill hazard
+	legAnimationState    = 0;	// @0x3b0 -- same hazard (found 2026-07-14, the real-clock
+								// crash): the type-3 record writer re-dispatches
+								// SetBodyAnimation(legAnimationState) on itself; a record
+								// emitted before the leg SM's first tick passed the raw
+								// 0xCDCDCDCD as a clip index -> AV in SetBodyAnimation.
+								// (The stub call-counter clock had merely re-ordered record
+								// emission so the window was never hit.)  Standing = 0.
 	attrPad             = 0.0f;	// shared read pad for un-populated gauge attributes
 	linearSpeed         = 0.0f;	// live forward ground speed (LinearSpeed gauge); set per frame
+	// Size the animation StateIndicators to cover clips 0..0x20 (MechAnimationState,
+	// death variants past AnimationCount=0x1d included) so SetState(state) never trips
+	// Verify(state<stateCount).  operator= copies only the counts (keeps the ctor-built
+	// watcher sockets); then seat the initial standing state.  [T2]
+	animationState          = StateIndicator(0x21);
+	animationState.SetState(0);						// StandingAnimation
+	replicantAnimationState = StateIndicator(0x21);
+	replicantAnimationState.SetState(0);
+	// CollisionState: 4 states (NoCollision/InitialHit/Slide/Rest) driven per frame
+	// from the collision walk (ProcessCollision) so impact audio fires on contact.
+	collisionState          = StateIndicator(4);	// CollisionStateCount
+	collisionState.SetState(0);						// NoCollisionState
+	collisionTemporaryState = 0;
+	footStep                = 0;					// FootStep pulse (audio trigger)
+	footStepRootJoint       = 0;					// (F5) resolved on first contact eval
+	footStepRootResolved    = 0;
+	// (F19) the acceleration-feed rings (binary: size 0xF, fill 0)
+	for (int vr = 0; vr < 15; ++vr)
+		velRingFwd[vr] = velRingVert[vr] = velRingDt[vr] = 0.0f;
+	velRingCursor           = 0;
+	accelPrevFwdMean        = 0.0f;
+	accelPrevVertMean       = 0.0f;
+	accelPrevPos            = localOrigin.linearPosition;
+	// (task #66) instability accumulator: the binary reset zeroes 0x3F0
+	// (part_012.c:9420); the tuning members are set from the model record below.
+	unstablePercentage      = 0.0f;
+	fwdSpeedFiltered        = 0.0f;					// smoothed published velocity (see mech4 derive)
+	vertSpeedFiltered       = 0.0f;
+	{ extern void *g_btFootStepAddr; g_btFootStepAddr = &footStep; }	// DIAG: watcher-poll tracer target
+	{ extern void *g_btAccelAddr; g_btAccelAddr = &localAcceleration; }	// DIAG: accel poll/change tracer
 	radarRange          = 1000.0f;						// radar display scale (SetTargetRange is stubbed;
 														// 1km default zoom so contacts within ~500m show on
 														// the radar, vs the config maximum_range=4000 edge)
 	radarLinearPosition = &localOrigin.linearPosition;	// map reads the mech's live world position...
 	radarAngularPosition= &localOrigin.angularPosition;	// ...and orientation (pointers into the base origin)
 	duckState           = 0;							// not crouching
+	// (AUDIO_FIDELITY F7) missile alarm: the binary reset writes 0 / FLT_MAX
+	// (part_012.c:9446-9447; FLT_MAX = "no missile" far default)
+	incomingLock            = 0;
+	distanceToMissile       = FLT_MAX;
+	incomingLockNext        = 0;
+	distanceToMissileNext   = FLT_MAX;
+	// (F17) impact-speed scale + cab REDUCE button
+	collisionSpeed          = 0.0f;
+	reduceButton            = 0;
 
 	ZeroBlock(this + 0xca, 6);							// this[0xca..0xcf] = 0
 	ZeroBlock(this + 0x153, 6);							// this[0x153..0x158] = 0
@@ -908,6 +991,12 @@ Mech::Mech(
 	Wword(0xe6)  = 0;
 	poseSyncLatch = 0;									// @0x77c (was absorbed Wword(0x1df))
 	heatLevelSnapshot = 0;								// @0x780 (type-7 deadband baseline)
+	mirrorBodyAdv  = 0.0f;								// master send-mirror gait travel
+	peerMirrorSpeed = -1.0f;							// peer true-mirror cadence (disabled by default)
+	angMirrorYaw   = 0.0f;								// scalar peer-yaw mirror (port addition)
+	angMirrorRate  = 0.0f;
+	angMirrorValid = 0;
+	angSyncLatch   = 0;									// peer heading re-anchor (type-4 receive)
 	Wword(0xfe)  = Wword(0xfc) = Wword(0x105) = 0;
 	mechName.Copy(&DAT_004e0f8c);						// FUN_00408e90(this+0xd8,"")
 	Wword(0x160) = Wword(0x15f) = 0;
@@ -952,7 +1041,9 @@ Mech::Mech(
 		SetPerformance(PTR_LAB_0050c0f4);				// master performance
 	}
 
-	maxSpeed     = 0x447a0000;							// 1000.0f -> Wword(0x101) (override)
+	// (F7 correction) the old "maxSpeed = 1000.0f override" here targeted
+	// Wword(0x101) = +0x404 -- the binary table says that is RadarRange
+	// (id 47), already initialized as radarRange = 1000.0f above.
 	Wword(0x102)  = 0;
 	Wword(0x103)  = (int)(this + 0x43);
 
@@ -1238,11 +1329,17 @@ Mech::Mech(
 	}
 	for (int id = 2; id < subsystemCount; ++id)			// weapon roster (0x511830 = MechWeapon)
 	{
-		SubProxy *s = (SubProxy *)subsystemArray[id];
-		if (s != 0 && s->IsDerivedFrom(0x511830))
+		// (task #68) REAL derivation test via the mechweap bridge -- the old
+		// SubProxy::IsDerivedFrom stub returned 0, so this loop never ran
+		// (empty weaponRoster, no capability OR).
+		extern int BTWeaponIsRearFiring(Subsystem *sub);	// -1 = not a weapon
+		int rf = BTWeaponIsRearFiring(subsystemArray[id]);
+		if (rf >= 0)
 		{
-			weaponRoster.Add((Subsystem *)s);
-			stateFlags |= s->capabilityFlags;			// |= *(s+0x334) -> Wword(0x104)
+			weaponRoster.Add(subsystemArray[id]);
+			// mech.RearFiring |= weapon.rearFiring (binary ctor
+			// @part_012.c:10220: mech[0x104] |= *(weapon+0x334))
+			rearFiring |= rf;
 		}
 	}
 	for (int id = 2; id < subsystemCount; ++id)			// damageable roster
@@ -1303,18 +1400,21 @@ Mech::Mech(
 			<< " superStop=" << airborneCycleRate
 			<< " throttleAdj=" << forwardThrottleScale << std::endl;
 	Wword(0x12f)                = model->relativeMechValue;		// rec+0x70 -> mech+0x4bc
-	Wword(0x1e1) = model->maxUnstableAcceleration;		// rec+0x80-0x94 -> mech+0x784..0x798
-	Wword(0x1e2) = model->unstableAccelerationEffect;	//  (the six Unstable* effects)
-	Wword(0x1e3) = model->unstableGunTheEngineEffect;
-	Wword(0x1e4) = model->unstableSuperStopEffect;
-	Wword(0x1e5) = model->unstableHighVelocityEffect;
-	Wword(0x1e6) = model->unstableStopedTurnEffect;
+	// (task #66) the six Unstable* tuning fields are REAL members now (the
+	// instability model consumes them); binary rec+0x80-0x94 -> mech+0x784..0x798.
+	maxUnstableAcceleration    = model->maxUnstableAcceleration;
+	unstableAccelerationEffect = model->unstableAccelerationEffect;
+	unstableGunTheEngineEffect = model->unstableGunTheEngineEffect;
+	unstableSuperStopEffect    = model->unstableSuperStopEffect;
+	unstableHighVelocityEffect = model->unstableHighVelocityEffect;
+	unstableStopedTurnEffect   = model->unstableStopedTurnEffect;
 
-	// Angle fields converted from degrees to radians.
-	Wword(0x159) = (int)(model->lookLeftAngle  * DegreesToRadians);	// +0x50
-	Wword(0x15a) = (int)(model->lookRightAngle * DegreesToRadians);	// +0x54
-	Wword(0x15b) = (int)(model->lookFrontAngle * DegreesToRadians);	// +0x58
-	Wword(0x15c) = (int)(model->lookBackAngle  * DegreesToRadians);	// +0x5c
+	// Angle fields converted from degrees to radians.  (task #68: REAL members
+	// now -- the look-state commit consumes them; were Wword scratch parks.)
+	lookLeftAngle  = model->lookLeftAngle  * DegreesToRadians;	// +0x50 -> @0x564
+	lookRightAngle = model->lookRightAngle * DegreesToRadians;	// +0x54 -> @0x568
+	lookFrontAngle = model->lookFrontAngle * DegreesToRadians;	// +0x58 -> @0x56C
+	lookBackAngle  = model->lookBackAngle  * DegreesToRadians;	// +0x5c -> @0x570
 	// The update-record deadbands (task #3; the struct is now the verified
 	// 200-byte overlay, so the named fields ARE the raw offsets).
 	updateTurnAngleDeadband    = model->updateTurnDegreeDiffrence * DegreesToRadians;	// @0x770
@@ -1777,6 +1877,33 @@ Logical
 void
 	Mech::ReadUpdateRecord(Simulation::UpdateRecord *message)
 {
+	// RECORD-CADENCE probe (BT_RXJIT): quantify how EVENLY records arrive (wall-clock
+	// ms between arrivals) -- the jitter that makes the peer's corrections random.
+	if (getenv("BT_RXJIT") && GetInstance() == ReplicantInstance)
+	{
+		LARGE_INTEGER _now, _freq;
+		QueryPerformanceCounter(&_now); QueryPerformanceFrequency(&_freq);
+		static double s_lastMs = 0.0, s_min = 1e9, s_max = 0.0, s_acc = 0.0;
+		static int s_n = 0, s_rep = 0;
+		const double nowMs = (double)_now.QuadPart * 1000.0 / (double)_freq.QuadPart;
+		if (s_lastMs > 0.0)
+		{
+			const double gap = nowMs - s_lastMs;
+			s_n++; s_acc += gap;
+			if (gap > s_max) s_max = gap;
+			if (gap < s_min) s_min = gap;
+		}
+		s_lastMs = nowMs;
+		if (++s_rep >= 120 && s_n > 0)
+		{
+			DEBUG_STREAM << "[rxjit] records/win=" << s_n
+				<< " gapMs min=" << s_min << " avg=" << (s_acc / s_n)
+				<< " max=" << s_max
+				<< " burstiness(max/avg)=" << (s_max / (s_acc / s_n))
+				<< "\n" << std::flush;
+			s_rep = 0; s_n = 0; s_acc = 0.0; s_min = 1e9; s_max = 0.0;
+		}
+	}
 	static const int s_mrecLog = getenv("BT_REPL_LOG") ? 1 : 0;
 	if (s_mrecLog && message->recordID != 0)
 		DEBUG_STREAM << "[mrec-rx] type=" << (int)message->recordID
@@ -1803,6 +1930,13 @@ void
 			updateVelocity.angularMotion = savedAngV;	// FUN_00408440
 			poseSyncLatch = 1;							// @0x77c -- arm the dead-reckon re-base
 
+			if (getenv("BT_WIRE"))
+				DEBUG_STREAM << "[rx0] ent=" << GetEntityID()
+					<< " uvLin=(" << updateVelocity.linearMotion.x << ","
+					<< updateVelocity.linearMotion.z << ")"
+					<< " uPos=(" << updateOrigin.linearPosition.x << ","
+					<< updateOrigin.linearPosition.z << ")\n" << std::flush;
+
 			if (bodyAnimationState == 2 || bodyAnimationState == 3)	// @0x728
 			{
 				projectedVelocity.linearMotion  = ZeroVector;	// FUN_0040a7f4(0x298, zeroMotion)
@@ -1830,7 +1964,23 @@ void
 	case 2:		// commanded-speed update
 		{
 			Mech__SpeedUpdateRecord *record = (Mech__SpeedUpdateRecord *)message;
-			Simulation::ReadUpdateRecord(message);		// FUN_0041bd34
+			{
+				// CLOCK GUARD (keyboard-skip fix): the base reader stamps lastUpdate=Now()
+				// on EVERY record ('HACK' per SIMULATE.cpp:276).  Non-pose records carry no
+				// pose, but that stamp shrinks the dead-reckoner's projection span
+				// (nextUpdate - lastUpdate) WITHOUT refreshing updateOrigin -- so the
+				// peer's position target jumps backward toward the stale origin, then the
+				// next pose record yanks it forward: target oscillation every frame while
+				// records churn.  Keyboard driving churns them CONSTANTLY (the throttle
+				// lever sweeps every frame of a key-hold -> a type-2 speed record per
+				// frame), which autodrive's pinned throttle never does -- the 'skips when
+				// I drive, smooth when you drive' report.  Preserve the clock; keep the
+				// real payload (simulationState).  BT_T2_CLOCK restores the old stamp (A/B).
+				static const int s_t2clock = getenv("BT_T2_CLOCK") ? 1 : 0;
+				const Time savedLastUpdate = lastUpdate;
+				Simulation::ReadUpdateRecord(message);
+				if (!s_t2clock) lastUpdate = savedLastUpdate;
+			}		// FUN_0041bd34
 			bodyTargetSpeed = record->speedDemand;		// @0x6b4 <- rec+0x10
 		}
 		break;
@@ -1838,7 +1988,29 @@ void
 	case 3:		// leg/body state + stability
 		{
 			Mech__StateUpdateRecord *record = (Mech__StateUpdateRecord *)message;
-			Simulation::ReadUpdateRecord(message);
+			if (getenv("BT_GAITEV"))
+				DEBUG_STREAM << "[t3rx] legState=" << record->legState
+					<< " reset=" << record->legResetLatch
+					<< " myLegState=" << (int)legStateAlarm.GetLevel()
+					<< " myLegFrm=" << legAnimation.currentFrame
+					<< " spd=" << record->speedDemand << "\n" << std::flush;
+			{
+				// CLOCK GUARD (keyboard-skip fix): the base reader stamps lastUpdate=Now()
+				// on EVERY record ('HACK' per SIMULATE.cpp:276).  Non-pose records carry no
+				// pose, but that stamp shrinks the dead-reckoner's projection span
+				// (nextUpdate - lastUpdate) WITHOUT refreshing updateOrigin -- so the
+				// peer's position target jumps backward toward the stale origin, then the
+				// next pose record yanks it forward: target oscillation every frame while
+				// records churn.  Keyboard driving churns them CONSTANTLY (the throttle
+				// lever sweeps every frame of a key-hold -> a type-2 speed record per
+				// frame), which autodrive's pinned throttle never does -- the 'skips when
+				// I drive, smooth when you drive' report.  Preserve the clock; keep the
+				// real payload (simulationState).  BT_T2_CLOCK restores the old stamp (A/B).
+				static const int s_t2clock = getenv("BT_T2_CLOCK") ? 1 : 0;
+				const Time savedLastUpdate = lastUpdate;
+				Simulation::ReadUpdateRecord(message);
+				if (!s_t2clock) lastUpdate = savedLastUpdate;
+			}
 			bodyResetLatch = record->legResetLatch;		// @0x658 <- rec+0x10
 			stabilityAlarm.SetLevel(record->stability);	// @0x4c4 <- rec+0x18
 			if (record->legState == 0)
@@ -1879,13 +2051,30 @@ void
 				}
 			}
 			bodyTargetSpeed = record->speedDemand;		// rec+0x28
+			angSyncLatch = 1;							// arm the peer heading re-anchor
 		}
 		break;
 
 	case 5:		// knockdown
 		{
 			Mech__FallUpdateRecord *record = (Mech__FallUpdateRecord *)message;
-			Simulation::ReadUpdateRecord(message);
+			{
+				// CLOCK GUARD (keyboard-skip fix): the base reader stamps lastUpdate=Now()
+				// on EVERY record ('HACK' per SIMULATE.cpp:276).  Non-pose records carry no
+				// pose, but that stamp shrinks the dead-reckoner's projection span
+				// (nextUpdate - lastUpdate) WITHOUT refreshing updateOrigin -- so the
+				// peer's position target jumps backward toward the stale origin, then the
+				// next pose record yanks it forward: target oscillation every frame while
+				// records churn.  Keyboard driving churns them CONSTANTLY (the throttle
+				// lever sweeps every frame of a key-hold -> a type-2 speed record per
+				// frame), which autodrive's pinned throttle never does -- the 'skips when
+				// I drive, smooth when you drive' report.  Preserve the clock; keep the
+				// real payload (simulationState).  BT_T2_CLOCK restores the old stamp (A/B).
+				static const int s_t2clock = getenv("BT_T2_CLOCK") ? 1 : 0;
+				const Time savedLastUpdate = lastUpdate;
+				Simulation::ReadUpdateRecord(message);
+				if (!s_t2clock) lastUpdate = savedLastUpdate;
+			}
 			heatAlarm.SetLevel(record->heatLevel);		// @0x450 <- rec+0x10
 			throttleState = record->throttleState;		// @0x4a4 <- rec+0x14
 			fallDirection = record->fallDirection;		// @0x4a8 <- rec+0x18
@@ -1900,7 +2089,23 @@ void
 	case 6:		// death
 		{
 			Mech__FallUpdateRecord *record = (Mech__FallUpdateRecord *)message;
-			Simulation::ReadUpdateRecord(message);
+			{
+				// CLOCK GUARD (keyboard-skip fix): the base reader stamps lastUpdate=Now()
+				// on EVERY record ('HACK' per SIMULATE.cpp:276).  Non-pose records carry no
+				// pose, but that stamp shrinks the dead-reckoner's projection span
+				// (nextUpdate - lastUpdate) WITHOUT refreshing updateOrigin -- so the
+				// peer's position target jumps backward toward the stale origin, then the
+				// next pose record yanks it forward: target oscillation every frame while
+				// records churn.  Keyboard driving churns them CONSTANTLY (the throttle
+				// lever sweeps every frame of a key-hold -> a type-2 speed record per
+				// frame), which autodrive's pinned throttle never does -- the 'skips when
+				// I drive, smooth when you drive' report.  Preserve the clock; keep the
+				// real payload (simulationState).  BT_T2_CLOCK restores the old stamp (A/B).
+				static const int s_t2clock = getenv("BT_T2_CLOCK") ? 1 : 0;
+				const Time savedLastUpdate = lastUpdate;
+				Simulation::ReadUpdateRecord(message);
+				if (!s_t2clock) lastUpdate = savedLastUpdate;
+			}
 			heatAlarm.SetLevel(record->heatLevel);
 			throttleState = record->throttleState;
 			fallDirection = record->fallDirection;
@@ -1917,7 +2122,23 @@ void
 	case 7:		// impact (fields only, no side effects)
 		{
 			Mech__FallUpdateRecord *record = (Mech__FallUpdateRecord *)message;
-			Simulation::ReadUpdateRecord(message);
+			{
+				// CLOCK GUARD (keyboard-skip fix): the base reader stamps lastUpdate=Now()
+				// on EVERY record ('HACK' per SIMULATE.cpp:276).  Non-pose records carry no
+				// pose, but that stamp shrinks the dead-reckoner's projection span
+				// (nextUpdate - lastUpdate) WITHOUT refreshing updateOrigin -- so the
+				// peer's position target jumps backward toward the stale origin, then the
+				// next pose record yanks it forward: target oscillation every frame while
+				// records churn.  Keyboard driving churns them CONSTANTLY (the throttle
+				// lever sweeps every frame of a key-hold -> a type-2 speed record per
+				// frame), which autodrive's pinned throttle never does -- the 'skips when
+				// I drive, smooth when you drive' report.  Preserve the clock; keep the
+				// real payload (simulationState).  BT_T2_CLOCK restores the old stamp (A/B).
+				static const int s_t2clock = getenv("BT_T2_CLOCK") ? 1 : 0;
+				const Time savedLastUpdate = lastUpdate;
+				Simulation::ReadUpdateRecord(message);
+				if (!s_t2clock) lastUpdate = savedLastUpdate;
+			}
 			heatAlarm.SetLevel(record->heatLevel);
 			throttleState = record->throttleState;
 			fallDirection = record->fallDirection;
@@ -1929,7 +2150,23 @@ void
 	case 8:		// airborne/reverse cycle-rate selector
 		{
 			Mech__AirborneUpdateRecord *record = (Mech__AirborneUpdateRecord *)message;
-			Simulation::ReadUpdateRecord(message);
+			{
+				// CLOCK GUARD (keyboard-skip fix): the base reader stamps lastUpdate=Now()
+				// on EVERY record ('HACK' per SIMULATE.cpp:276).  Non-pose records carry no
+				// pose, but that stamp shrinks the dead-reckoner's projection span
+				// (nextUpdate - lastUpdate) WITHOUT refreshing updateOrigin -- so the
+				// peer's position target jumps backward toward the stale origin, then the
+				// next pose record yanks it forward: target oscillation every frame while
+				// records churn.  Keyboard driving churns them CONSTANTLY (the throttle
+				// lever sweeps every frame of a key-hold -> a type-2 speed record per
+				// frame), which autodrive's pinned throttle never does -- the 'skips when
+				// I drive, smooth when you drive' report.  Preserve the clock; keep the
+				// real payload (simulationState).  BT_T2_CLOCK restores the old stamp (A/B).
+				static const int s_t2clock = getenv("BT_T2_CLOCK") ? 1 : 0;
+				const Time savedLastUpdate = lastUpdate;
+				Simulation::ReadUpdateRecord(message);
+				if (!s_t2clock) lastUpdate = savedLastUpdate;
+			}
 			airborneSelect  = record->airborne;			// @0x3f4 <- rec+0x10
 			bodyTargetSpeed = record->speedDemand;		// rec+0x14
 		}
@@ -2091,6 +2328,24 @@ void
 			}
 			updateOrigin.angularPosition = localOrigin.angularPosition;	// FUN_00409968(0x138 <- 0x10c)
 			updateVelocity.angularMotion = localVelocity.angularMotion;	// FUN_00408440(0x2d4 <- 0x1d0)
+			// RE-BASE the master's peer-estimate mirror (2026-07-14, replicant-chop
+			// fix): projectedOrigin/projectedVelocity model what the PEER will now
+			// extrapolate from this record.  The send gate compares local vs projected
+			// (the peer's drift); without the re-base the mirror went stale, the gate
+			// fired EVERY frame, and the per-frame records re-based the replicant into
+			// the stall/snap chop.  (The binary maintains this in the un-decompiled
+			// master perf; the writer-side re-base is the coherent reconstruction.)
+			projectedOrigin.angularPosition   = localOrigin.angularPosition;
+			projectedVelocity.angularMotion   = localVelocity.angularMotion;
+			// SCALAR peer-yaw mirror re-base (see mech.hpp): what the peer will now
+			// extrapolate -- this yaw, at this rate, from this moment.
+			{
+				YawPitchRoll _my; _my = localOrigin.angularPosition;
+				angMirrorYaw   = (Scalar)_my.yaw;
+				angMirrorRate  = (Scalar)localVelocity.angularMotion.y;
+				angMirrorTime  = lastPerformance;
+				angMirrorValid = 1;
+			}
 			record->speedDemand = speedDemand;			// rec+0x28
 			bodyTargetSpeed     = speedDemand;
 		}
diff --git a/game/reconstructed/mech.hpp b/game/reconstructed/mech.hpp
index 31d4415..291393a 100644
--- a/game/reconstructed/mech.hpp
+++ b/game/reconstructed/mech.hpp
@@ -299,6 +299,7 @@ struct ShotDescriptor
 	{
 		friend class Mech__DamageZone;		// per-zone damage code reads the roster / segment table
 		friend struct MechBaseLayoutCheck;	// base-region layout locks (mech4.cpp; P3 STEP-6 audit)
+		friend void BTCommitLookState(void *, int);	// task #68: the look-state commit (mech4.cpp)
 	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 	// Shared Data Support
 	//
@@ -618,6 +619,32 @@ public:
 	Scalar		updatePositionDeadband;		// binary @0x768 -- type-0 pose trigger
 	Scalar		updateTurnVelocityDeadband;	// binary @0x76c -- type-4 yaw-rate trigger
 	Scalar		updateTurnAngleDeadband;	// binary @0x770 -- type-4 orientation trigger (rad)
+	// SCALAR peer-yaw mirror (port addition, replicant-spin work): the master's
+	// estimate of the yaw the PEER is currently rendering -- re-based on every
+	// type-4 send (writer case 4), advanced analytically as base + rate*elapsed.
+	// Replaces the quaternion projectedOrigin mirror for the ANGLE deadband: that
+	// one is recomputed by the master's own reckoner each frame from lastUpdate
+	// timing it does not control, and its false pi-drift waves FLOODED type-4
+	// resyncs (measured maxAng~=pi bursts).  Scalars, wrap-safe, self-timed.
+	// Master send-mirror gait travel (BT_MASTER_GAITMIRROR): the invisible mj=0
+	// body channel's per-frame cycleDistance, stashed in the drive block and
+	// consumed by the send gate to advance projectedOrigin the way the PEER
+	// predicts (gait), instead of the constant-velocity deadReckoner. This is the
+	// authentic FUN_004a9b5c mirror = IntegrateMotion(mj=0) on projectedOrigin.
+	Scalar		mirrorBodyAdv;				// body cycleDistance this frame (master)
+	// Peer true-mirror cadence: the replicant sets this to the actual replicated
+	// ground speed (|updateVelocity|) each frame so the body clip advances at the
+	// master's real rate instead of the locally-slewed bodyCycleSpeed (which drifts
+	// and makes the animation phase wander -> the accel/decel hesitation).  -1 =
+	// disabled (master/single-player always -1, so the authentic slew runs).
+	Scalar		peerMirrorSpeed;
+	Scalar		angMirrorYaw;				// yaw at the last type-4 send (rad)
+	Scalar		angMirrorRate;				// yaw rate sent with it (rad/s)
+	Time		angMirrorTime;				// lastPerformance at that send
+	int			angMirrorValid;				// 0 until the first type-4 send
+	int			angSyncLatch;				// peer: type-4 arrived -> re-anchor heading (the
+											//   angular analog of poseSyncLatch; consumed by
+											//   the replicant's incremental heading integrator)
 	// AUTHENTIC GROUND MODEL ctor products (task #15, ground-model-decode;
 	// binary part_012.c:9938-9940 + 9974-9975).  By-name access only; declared
 	// after the layout-locked fields so nothing shifts.
@@ -667,6 +694,14 @@ public:
 	Logical		PickRayHit(const Point3D &start, const Vector3D &dir,
 						   Scalar max_range, Point3D *hit_world);
 
+	// World-STRUCTURE boresight pick: ray-test the zone's STATIC collision solid
+	// tree (garages/walls/props -- the geometry that blocks the walk) along the
+	// boresight and return the entry point of the closest structure hit.  The
+	// authentic non-mech world pick (Mover::FindStaticSolidHitBy, the static-world
+	// half of the engine's FindBoxedSolidHitBy).  Defined in mech.cpp.
+	Logical		WorldStructurePick(const Point3D &start, const Vector3D &dir,
+							   Scalar max_range, Point3D *hit_world);
+
 	// Per-weapon beam render walk (task #33; extracted task #51 so it runs for
 	// EVERY mech -- player, dummy masters, and MP replicants whose emitters
 	// carry replicated discharge state).  Defined in mech4.cpp.
@@ -689,8 +724,22 @@ protected:
 	//
 	protected:
 		BTVal		mechName;					// @0x360  this[0xd8] (proxy: .Copy)
-		Scalar		maxSpeed;					// @0x400  this[0x100] = FLT_MAX
-		int			stateFlags;					// @0x410  this[0x104]
+		// (F7) `Scalar maxSpeed @0x400` was a MISREAD -- the binary attribute
+		// table names 0x400 DistanceToMissile (id 56; FLT_MAX = far default);
+		// the member is retired in favor of distanceToMissile below.
+		// (task #68) REAR-FIRING (binary attr id 50 @0x410; the old name was
+		// `stateFlags`): OR of every mounted weapon's rearFiring flag -- "this
+		// mech carries a rear arsenal".  The look-back view arms those weapons.
+		int			rearFiring;					// @0x410  this[0x104]
+		// (task #68) the authored look-view angles (model record +0x50..0x5c,
+		// ctor converts degrees->radians; binary @0x564..0x570 -- previously
+		// parked in the Wword scratch bank).  Consumed by the look-state
+		// commit: side views yaw by these, look-back = yaw pi + lookBackAngle
+		// pitch, look-down pitches by lookFrontAngle.
+		Scalar		lookLeftAngle;				// @0x564
+		Scalar		lookRightAngle;				// @0x568
+		Scalar		lookFrontAngle;				// @0x56C
+		Scalar		lookBackAngle;				// @0x570
 		int			throttleState;				// @0x4a4  this[0x129] = 2 (initial)
 		int			heatLevel;					// @0x518  this[0x146]
 		int			heatCapacity;				// @0x51c  this[0x147] = 0.6 * heatLevel
@@ -795,6 +844,73 @@ protected:
 		// forward ground speed the speed readout / arc / radar consume (binary @0x81c).
 		Scalar		attrPad;
 		Scalar		linearSpeed;
+		// Real StateIndicators for the animation-state attributes (0x1f/0x20).
+		// The audio subsystem binds AudioStateWatchers to these BY NAME and calls
+		// AddAudioWatcher() on them -- so unlike the scalar gauge attrs they CANNOT
+		// share the read-only attrPad (a Scalar has no watcher chain -> the watcher
+		// register AV'd on 0xCDCDCDCD).  Driven from SetBodyAnimation so footstep/
+		// gait sounds fire on animation transitions.  [T2]
+		StateIndicator	animationState;			// 0x1f AnimationState
+		StateIndicator	replicantAnimationState;	// 0x20 ReplicantAnimationState
+		// 0x16 CollisionState -- audio binds an AudioStateWatcher here too (impact/
+		// scrape sounds).  Driven from ProcessCollision via collisionTemporaryState:
+		// NoCollision(0)/InitialHit(1)/Slide(2)/Rest(3) (RP VTV CollisionStateCount).
+		StateIndicator	collisionState;
+		// 0x1e FootStep -- audio binds an AudioLogicalTrigger (threshold-crossing
+		// with hysteresis: rise past threshold -> play the step, fall back -> re-arm).
+		// Backed by a real pulse: SetBodyAnimation raises it 1 on entering a cyclic
+		// stride clip (each walk/run/reverse alternation == one foot plant) and the
+		// per-frame motion tick decays it back to 0 a few frames later, giving one
+		// clean rising edge per step.  [T2]
+		int				footStep;			// the Logical the matcher polls (1 = contact)
+		Scalar			fwdSpeedFiltered;	// smoothed |v| published via localVelocity (the raw
+		Scalar			vertSpeedFiltered;	// per-frame position derivative pulses per stride and
+											// flapped the audio's speed triggers -- engine-hum
+											// restarts on every footfall)
+		// (AUDIO_FIDELITY F5) footStep is the authored CONTACT LEVEL, not a
+		// clip-transition pulse: per frame (leg gait state not 0/1),
+		// footStep = (jointlocal.y <= *clip footStepThreshold) -- binary
+		// disasm @0x4a9e80-0x4a9eb6 (leg) / @0x4aba86-0x4abab9 (body); the
+		// threshold is the ANI header word[2] SelectSequence now captures.
+		// States 0/1 RETAIN the previous value (binary skip).  The old 150 ms
+		// pulse + decay members are retired.
+		Joint			*footStepRootJoint;	// cached "jointlocal" (binary mech+0x5C8)
+		int				footStepRootResolved;
+		// (AUDIO_FIDELITY F19, corrected) the binary's localAcceleration feed:
+		// FIVE 15-sample RING BUFFERS (ctor part_012.c:9836-9840, size 0xF
+		// fill 0) hold the RAW per-frame velocity components + dt;
+		// localAcceleration = (ringMean - prevRingMean) / ringMean(dt)
+		// (part_012.c:15169-15195).  A moving-window mean JITTERS every frame
+		// as samples rotate, so the accel attribute changes every watcher
+		// poll -- which is what keeps the authored N=30 footstep smoother fed
+		// (an exponential-filter derivative goes epsilon-flat between strides
+		// and starved it: the 10-20 s footstep warm-up bug).
+		Scalar			velRingFwd[15];
+		Scalar			velRingVert[15];
+		Scalar			velRingDt[15];
+		int				velRingCursor;
+		Scalar			accelPrevFwdMean;
+		Scalar			accelPrevVertMean;
+		Point3D			accelPrevPos;		// raw position memory for the ring feed
+		// (task #66, the gyro-tail INSTABILITY MODEL -- byte-decoded from the
+		// master perf @0x4aad3d-0x4aaf14 [T1]):
+		//   instab  = (min(|AccelerationLastFrame| / maxUnstableAcceleration, 1)
+		//              x unstableAccelerationEffect)^2
+		//   instab += clamp((demand - legCycleSpeed)/demand, <=1)   ["gun the
+		//              engine": commanded speed the legs haven't reached]
+		//              x unstableGunTheEngineEffect
+		//   if (legAnimationState == 4 /*trn*/) instab += unstableStopedTurnEffect
+		//   clamp to 1 -> mech+0x3F0, then gyro->swayBias (gyro+0x3A8) and the
+		//   UnstablePercentage audio attribute (binary id 52 @0x3F0) read it.
+		// The six tuning fields come from the model record +0x80..0x94 (ctor
+		// @0x4a2593-0x4a25d5); previously parked in the Wword scratch bank.
+		Scalar			unstablePercentage;	// binary @0x3F0 (reset writes 0)
+		Scalar			maxUnstableAcceleration;	// @0x784 <- rec+0x80
+		Scalar			unstableAccelerationEffect;	// @0x788 <- rec+0x84
+		Scalar			unstableGunTheEngineEffect;	// @0x78C <- rec+0x88
+		Scalar			unstableSuperStopEffect;	// @0x790 <- rec+0x8C (writer not yet located; airborne perf?)
+		Scalar			unstableHighVelocityEffect;	// @0x794 <- rec+0x90 (writer not yet located)
+		Scalar			unstableStopedTurnEffect;	// @0x798 <- rec+0x94
 		// Radar/map gauge attributes (binary @0x404/0x408/0x40c/0x3f8).  The map
 		// widget reads position/angle as POINTERS into the mech's live origin, so
 		// radarLinearPosition/radarAngularPosition point at localOrigin.{linear,
@@ -803,6 +919,27 @@ protected:
 		Point3D		*radarLinearPosition;	// 0x30  RadarLinearPosition
 		Quaternion	*radarAngularPosition;	// 0x31  RadarAngularPosition
 		int			duckState;				// 0x37  DuckState (crouch posture)
+		// (AUDIO_FIDELITY F7) the incoming-missile alarm attributes.  Binary
+		// Mech table [T1]: IncomingLock id 54 @0x3fc (Logical; authored match
+		// ==1 Start / ==0 Stop of the looped beeper), DistanceToMissile id 56
+		// @0x400 (Scalar; authored scale maps range 100..800 -> TEMPO 600..10,
+		// the beep accelerating as the missile closes).  The mech reset inits
+		// them 0 / FLT_MAX (part_012.c:9446-9447); the live writer is in an
+		// un-exported gap, so the drive is intent-level [T3]: every homing
+		// Missile reports its target + range per MoveAndCollide tick into the
+		// *Next accumulators; PerformAndWatch latches them each frame.
+		int			incomingLock;			// 0x36  IncomingLock (1 = missile inbound)
+		Scalar		distanceToMissile;		// 0x38  DistanceToMissile (FLT_MAX = none)
+		int			incomingLockNext;		// accumulator (missiles OR into it)
+		Scalar		distanceToMissileNext;	// accumulator (missiles MIN into it)
+		// (AUDIO_FIDELITY F17) CollisionSpeed (binary id 24 @0x4B4): |impact
+		// velocity| captured when the contact accumulator arms (0->1) -- the
+		// authored AttackVolume [0.9,1] / Brightness [0.7,1] scales over
+		// impact speed [0,25] read it, so impacts scale with how hard you hit.
+		// ReduceButton (id 46 @0x340): the pod cab's REDUCE button; a real,
+		// watchable member -- the keyboard rig simply never presses it.
+		Scalar		collisionSpeed;			// 0x18  CollisionSpeed
+		int			reduceButton;			// 0x2e  ReduceButton
 
 		// --- raw / engine-shim members touched by the ctor slice -------------
 		void			*vtable;				// installed Mech vtable ptr
@@ -828,6 +965,15 @@ protected:
 	public:
 		int		MovementMode()			{ return (int)GetSimulationState(); }
 		void	SetMovementMode(int m)	{ SetSimulationState((unsigned)m); }
+		// (AUDIO_FIDELITY F7) called by each homing Missile per MoveAndCollide
+		// tick; PerformAndWatch latches the accumulators into the published
+		// IncomingLock/DistanceToMissile attributes each frame.
+		void	ReportIncomingMissile(Scalar range)
+		{
+			incomingLockNext = 1;
+			if (range < distanceToMissileNext)
+				distanceToMissileNext = range;
+		}
 		// (the members below were and stay PUBLIC -- the recon TUs
 		// (btplayer/dmgtable/mechmppr/emitter) reach them directly)
 		int				movementFlags;
@@ -1013,7 +1159,11 @@ protected:
 		int				flags;					// entity flags word (this+0x28 region)
 		Scalar			lastInflictingDamage;	// task #60: killing-blow magnitude (port-only; reuses
 												// the retired phantom `stance` slot -- feeds the kill score)
-		int				ammoState;				// @0x44c  0 none / 1 leaking / 2 dry
+		int				collisionTemporaryState;	// @0x44c  per-frame collision accumulator
+													// (0 none / 1 InitialHit / 2 Slide) -- CORRECTED from
+													// the "ammoState 0/1 leaking/2 dry" mislabel; the decomp
+													// (part_012.c:15406-15413) sets it per resolved contact,
+													// pushed into collisionState each frame.  Never read as ammo.
 		AlarmIndicator	graphicAlarm;			// body graphic-state alarm
 		EntityID		lastInflictingID;		// @0x43c  last attacker (read by DamageZone routing)
 		Logical			IsAirborne();
diff --git a/game/reconstructed/mech2.cpp b/game/reconstructed/mech2.cpp
index ea85219..898f368 100644
--- a/game/reconstructed/mech2.cpp
+++ b/game/reconstructed/mech2.cpp
@@ -90,6 +90,10 @@
 //
 
 #include <bt.hpp>
+#include <AUDCMP.hpp>		// AudioComponent -- the foot-plant step-intensity broadcast
+#include <AUDSRC.hpp>		// AudioSource -- footstep-source identification
+#include <AUDLVL.hpp>		// AudioResource::GetAudioLevelOfDetail
+#include <L4AUDLVL.hpp>	// PatchLevelOfDetail -- bank/patch of the target source
 #pragma hdrstop
 
 #if !defined(MECH_HPP)
@@ -239,6 +243,39 @@ void
 		// binary's DAT_0050d700/704).
 		(void *)&Mech::BodyClipFinished, 0, 0);
 	bodyStateAlarm.SetLevel(state);					// FUN_0041bbd8(this+0x714, state)
+
+	// Drive the AnimationState indicators so the audio subsystem's state-watchers
+	// (footstep/gait/transition sounds) fire on every animation change.  Guarded to
+	// the constructed range (stateCount 0x21) so an out-of-range clip can't trip
+	// StateIndicator::SetState's Verify(state<stateCount).  [T2]
+	if (state >= 0 && state < 0x21)
+	{
+		animationState.SetState(state);
+		replicantAnimationState.SetState(state);
+	}
+
+	// FootStep pulse: every locomotion-clip transition is one foot plant (the
+	// stride R<->L alternation -- MEASURED at runtime: forward walking alternates
+	// body states 12<->13, so the enum-name numbering above does NOT match the
+	// runtime clip ids; key on the locomotion RANGE instead).  Clips 1..0x17 are
+	// the gait cycle (stand-to-walk through gimp); 0 = standing, >= 0x18 = falls/
+	// knockdown/death (those get collision/fall audio, not a step).  Raise the
+	// Logical the FootStep AudioLogicalTrigger polls; IntegrateMotion decays it
+	// back to 0 a few frames later so each step is a clean rising edge.  [T2]
+	// (AUDIO_FIDELITY F5) the old per-transition footStep PULSE is GONE:
+	// footStep is the authored CONTACT LEVEL, evaluated per frame in
+	// Mech::PerformAndWatch from jointlocal.y vs the clip's authored
+	// threshold (ANI hdr[2]) -- steps now fire at actual root-height
+	// contact crossings, not at clip boundaries with a fixed width.
+	// (F19) the old STEP-INTENSITY SEND is also GONE.  Its premise ("the
+	// mixer feed was lost game code") was wrong: the feed is WHOLLY
+	// AUTHORED -- LocalAcceleration |linear| [0,10] -> ctl100 and
+	// LocalVelocity |linear| [0,0.6] -> ctl101 scale watchers drive the
+	// footstep volume mixer (0.4 base while moving + the per-stride
+	// acceleration kick).  The port's gap was never publishing
+	// localAcceleration; mech4.cpp derives it exactly as the binary does
+	// (d(averaged velocity)/dt, part_012.c:15186-15195), and the invented
+	// broadcast fought that live chain.
 }
 
 //
@@ -613,11 +650,25 @@ Scalar
 			// cases and the port never per-frame-clears the latch), so gating entry on
 			// it here would wrongly block trn after every walk.  Omitted by design;
 			// see locomotion.md "turn-in-place dispatcher".
+			// REPLICANT accommodation (regression fix, 2026-07-14): the dispatcher
+			// above is MASTER-perf logic; a replicant feeds this SM DERIVED signals
+			// (speed/turn from the dead-reckon stream, mech4.cpp:1948) and runs ONLY
+			// the leg channel.  Two master rules break it:
+			//  (1) the body weld -- a replicant never runs the body SM, so arming the
+			//      body to 4 sticks bodyAnimationState there forever and BLOCKS every
+			//      later trn entry (the peer "rotates as a statue");
+			//  (2) the full [0,standSpeed] entry -- the derived speed sweeps that band
+			//      on every dead-reckoned start/stop with turnDemand pinned +-1, so
+			//      trn keeps arming mid-locomotion and speed-exiting (jerky walking).
+			// Replicants: no body weld / no body arm (channel is inert, mj=0) and the
+			// narrow near-zero entry gate (the pre-#64b accommodation). [T3]
+			const int trnIsRepl = (GetInstance() == ReplicantInstance);
+			const Scalar trnEntryMax = trnIsRepl ? standSpeed * 0.25f : standSpeed;
 			if (hasCrashSet != 0 && mppr != 0
-				&& commandedSpeed >= ZeroSpeed && commandedSpeed <= standSpeed
+				&& commandedSpeed >= ZeroSpeed && commandedSpeed <= trnEntryMax
 				&& (mppr->turnDemand > 0.05f
 					|| mppr->turnDemand < -0.05f)
-				&& bodyAnimationState == StandingAnimation)	// weld: enter only when BOTH can
+				&& (trnIsRepl || bodyAnimationState == StandingAnimation))	// weld: masters only
 			{
 				// LOCKSTEP (task #64): arm BOTH channels on the same frame.  Arming
 				// only the leg let the body enter walk on its own schedule ~7-20
@@ -631,7 +682,8 @@ Scalar
 				// (the authentic dispatcher in the un-decompiled 0x4a9b5c gap arms
 				// both -- the body's case-4/finish machinery is dead code otherwise).
 				SetLegAnimation(4);						// turn-in-place (trn), channel A
-				SetBodyAnimation(4);					// channel B, same frame [lockstep]
+				if (!trnIsRepl)
+					SetBodyAnimation(4);				// channel B, same frame [lockstep, masters]
 				goto advance_normally;
 			}
 			if (ZeroSpeed <= commandedSpeed)
@@ -693,8 +745,17 @@ Scalar
 			distance = 0.0f;
 			break;
 		}
-		if (mppr == 0
-			|| (mppr->turnDemand <= 0.05f && mppr->turnDemand >= -0.05f))
+		// MASTER ONLY (regression fix): the master-perf turn-stop exit is master-perf
+		// logic (FUN_004a9b5c runs on MasterInstance mechs, NOT replicants).  A replicant
+		// derives turnDemand from the REPLICATED yaw rate (mech4.cpp:1968) -- a noisy
+		// proxy that dips into the deadband between dead-reckon updates; running this
+		// exit on it kicked the peer out of trn every few frames -> the peer "rotated as
+		// a statue" + jerky (user-reported).  Gate to masters; a replicant leaves trn via
+		// the speed exits + its own turnDemand-driven re-entry, exactly as it did before
+		// this exit was added.
+		if (GetInstance() != ReplicantInstance
+			&& (mppr == 0
+				|| (mppr->turnDemand <= 0.05f && mppr->turnDemand >= -0.05f)))
 		{
 			legStateAlarm.SetLevel(0);					// turn stopped -> Standing (master-perf exit)
 			ForceUpdate(8);
@@ -932,8 +993,9 @@ Scalar
 				distance = 0.0f;
 				break;
 			}
-			if (bm == 0
-				|| (bm->turnDemand <= 0.05f && bm->turnDemand >= -0.05f))
+			if (GetInstance() != ReplicantInstance		// MASTER only (see leg twin)
+				&& (bm == 0
+					|| (bm->turnDemand <= 0.05f && bm->turnDemand >= -0.05f)))
 			{
 				bodyStateAlarm.SetLevel(0);				// turn stopped (leg-symmetric)
 				ForceUpdate(8);
@@ -974,6 +1036,9 @@ Scalar
 			if (bodyCycleSpeed > bodyTargetSpeed)		bodyCycleSpeed = bodyTargetSpeed;
 			if (bodyCycleSpeed > walkStrideLength)		bodyCycleSpeed = walkStrideLength;
 		}
+		if (peerMirrorSpeed >= 0.0f)			// peer: cadence == actual mirrored ground speed
+			bodyCycleSpeed = (peerMirrorSpeed < standSpeed) ? standSpeed
+				: ((peerMirrorSpeed > walkStrideLength) ? walkStrideLength : peerMirrorSpeed);
 		distance = bodyAnimation.Advance(
 			time_slice * (bodyCycleSpeed / walkStrideLength) * globalTimeScale, loop);
 		break;
@@ -994,6 +1059,9 @@ Scalar
 			if (bodyCycleSpeed > bodyTargetSpeed)		bodyCycleSpeed = bodyTargetSpeed;
 			if (bodyCycleSpeed > reverseSpeedMax2)		bodyCycleSpeed = reverseSpeedMax2;
 		}
+		if (peerMirrorSpeed >= 0.0f)			// peer: cadence == actual mirrored ground speed
+			bodyCycleSpeed = (peerMirrorSpeed < reverseSpeedMax) ? reverseSpeedMax
+				: ((peerMirrorSpeed > reverseSpeedMax2) ? reverseSpeedMax2 : peerMirrorSpeed);
 		distance = bodyAnimation.Advance(
 			time_slice * (bodyCycleSpeed / reverseStrideLength) * globalTimeScale, loop);
 		break;
@@ -1134,6 +1202,9 @@ Scalar
 			if (bodyCycleSpeed > bodyTargetSpeed)		bodyCycleSpeed = bodyTargetSpeed;
 			if (bodyCycleSpeed > walkStrideLength)		bodyCycleSpeed = walkStrideLength;
 		}
+		if (peerMirrorSpeed >= 0.0f)			// peer: cadence == actual mirrored ground speed
+			bodyCycleSpeed = (peerMirrorSpeed < standSpeed) ? standSpeed
+				: ((peerMirrorSpeed > walkStrideLength) ? walkStrideLength : peerMirrorSpeed);
 		distance = bodyAnimation.Advance(
 			time_slice * (bodyCycleSpeed / walkStrideLength) * globalTimeScale, loop);
 		break;
@@ -1154,6 +1225,9 @@ Scalar
 			if (bodyCycleSpeed > bodyTargetSpeed)		bodyCycleSpeed = bodyTargetSpeed;
 			if (bodyCycleSpeed > reverseSpeedMax2)		bodyCycleSpeed = reverseSpeedMax2;
 		}
+		if (peerMirrorSpeed >= 0.0f)			// peer: cadence == actual mirrored ground speed
+			bodyCycleSpeed = (peerMirrorSpeed < reverseSpeedMax) ? reverseSpeedMax
+				: ((peerMirrorSpeed > reverseSpeedMax2) ? reverseSpeedMax2 : peerMirrorSpeed);
 		distance = bodyAnimation.Advance(
 			time_slice * (bodyCycleSpeed / reverseStrideLength) * globalTimeScale, loop);
 		break;
diff --git a/game/reconstructed/mech4.cpp b/game/reconstructed/mech4.cpp
index 8254360..f95db34 100644
--- a/game/reconstructed/mech4.cpp
+++ b/game/reconstructed/mech4.cpp
@@ -292,6 +292,9 @@ Logical
 	// Choose this frame's forward-cycle slew rate.
 	forwardCycleRate = airborneSelect ? airborneCycleRate : groundCycleRate;	// 0x344<-0x5bc/0x5b8
 
+	// (FootStep pulse decay moved to PerformAndWatch -- this integrator does not
+	// run on the current gait path, so a decay here never fired.)
+
 	if (IsDisabled())								// FUN_0049fb54
 	{
 		ReconQuatIdentity(&angularAccum, &kIdentityQuat);		// was raw this+0x298 (stomped projectedVelocity)
@@ -648,6 +651,7 @@ static int          gBTPPCKey         = 0;
 static int          gBTMissileKey     = 0;
 static int          gBTPinkyKey       = 0;	// key '4' = the pod's 4th fire button (Pinky 0x45)
 int                 gBTModeCycle      = 0;	// 'M' edge: cycle the control mode (mapper consumes)
+int                 gBTLookBehind     = 0;	// 'V' held: the pod's rear-view button (task #68)
 float               gBTTwistAxis      = 0.0f;	// Q/E torso-twist deflection (assisted-mode stick X)
 int                 gBTTorsoRecenter  = 0;	// 'X' edge: pulse the authentic torso recenter (mapper consumes)
 static int          gBTConfigKey      = 0;	// task #6: HOLD 'G' = the weapon-configure button
@@ -1072,7 +1076,7 @@ void
 void
 	BTPushProjectile(const Point3D &muzzle, void *shooter, void *target, const Point3D &targetPos,
 					 Scalar speed, Scalar damage, const Vector3D *launch_velocity, int guided,
-					 int weapon_subsys, int splash_burst)
+					 int weapon_subsys, int splash_burst, int muzzle_seg)
 {
 	// MUZZLE (muzzle wave, 2026-07-12): the passed muzzle is now the weapon's
 	// AUTHENTIC mount segment (GetMuzzlePoint reads the real segmentIndex --
@@ -1134,20 +1138,50 @@ void
 		if (launch_velocity != 0 && shooter != 0)
 		{
 			// FRAME CONVENTION (telemetry-verified 2026-07-12): the authored
-			// MuzzleVelocity is (0,0,+100) -- the launcher frame's +Z is
-			// FORWARD, but the mech's body frame faces -Z.  Transforming +Z
-			// through the body basis launched every round BACKWARD (then the
-			// seeker looped it through the ground onto the target --
-			// user-reported).  Map launcher-forward (+Z) onto body-forward
-			// (-Z basis): negate the z term.
+			// MuzzleVelocity is (0,0,+100) with a NEGATED z when composed --
+			// the binary's own fire builder does `local_40 -= MV.z`
+			// (FUN_004bcc60 @part_013.c:8761) [T1].
+			// TORSO-TWIST FIX (task #67, user-reported "missiles fire out of
+			// his back"): rotate through the WEAPON MOUNT SEGMENT's world
+			// frame, not the body basis.  The MadCat's racks ride the TORSO:
+			// the muzzle POINT tracked the twist (segment-resolved) while the
+			// launch DIRECTION followed the LEGS -- twist far enough and
+			// rounds left backward.  The binary spawns the missile with the
+			// full muzzle-segment frame (GetMuzzlePoint fills an AffineMatrix
+			// into the spawn descriptor, @0x4bcc60:8762-8764) and the dumb
+			// seeker aims 100u ahead of the MISSILE's own frame -- segment
+			// orientation IS the authentic launch direction.
 			Mech *sm = (Mech *)shooter;
 			UnitVector ax, ay, az;
-			sm->localToWorld.GetFromAxis(X_Axis, &ax);
-			sm->localToWorld.GetFromAxis(Y_Axis, &ay);
-			sm->localToWorld.GetFromAxis(Z_Axis, &az);
+			int haveFrame = 0;
+			if (muzzle_seg >= 0)
+			{
+				EntitySegment *seg = sm->GetSegment(muzzle_seg);
+				if (seg != 0)
+				{
+					AffineMatrix mw;
+					mw.Multiply(seg->GetSegmentToEntity(), sm->localToWorld);
+					mw.GetFromAxis(X_Axis, &ax);
+					mw.GetFromAxis(Y_Axis, &ay);
+					mw.GetFromAxis(Z_Axis, &az);
+					haveFrame = 1;
+				}
+			}
+			if (!haveFrame)
+			{
+				sm->localToWorld.GetFromAxis(X_Axis, &ax);
+				sm->localToWorld.GetFromAxis(Y_Axis, &ay);
+				sm->localToWorld.GetFromAxis(Z_Axis, &az);
+			}
 			p.vel.x = ax.x*launch_velocity->x + ay.x*launch_velocity->y - az.x*launch_velocity->z;
 			p.vel.y = ax.y*launch_velocity->x + ay.y*launch_velocity->y - az.y*launch_velocity->z;
 			p.vel.z = ax.z*launch_velocity->x + ay.z*launch_velocity->y - az.z*launch_velocity->z;
+			// (task #67) inherit the shooter's motion: the binary adds the
+			// mech's localVelocity into the spawn velocity (FUN_004b9cbc =
+			// owner+0x1c4 read, composed @0x4bcc60:8758-8761) [T1].
+			p.vel.x += sm->worldLinearVelocity.x;
+			p.vel.y += sm->worldLinearVelocity.y;
+			p.vel.z += sm->worldLinearVelocity.z;
 			Scalar lv = (Scalar)sqrtf(p.vel.x*p.vel.x + p.vel.y*p.vel.y + p.vel.z*p.vel.z);
 			if (lv > 1.0f) { p.speed = lv; haveLaunch = 1; }
 		}
@@ -1863,6 +1897,9 @@ void
 	}
 }
 
+// Peer heading published each sim update, sampled by the render loop (BT_RENDHDG).
+volatile float gBTReplRenderYaw = -999.0f;
+
 void
 	Mech::PerformAndWatch(const Time& till, MemoryStream *update_stream)
 {
@@ -1927,9 +1964,100 @@ void
 	{
 		if (dt > 0.0001f && dt < 0.5f)
 		{
-			DeadReckon(dt);							// engine: reckoner + lerp
+			// AUTHENTIC PEER HEADING (decomp FUN_004ab188/FUN_00409f58 via FUN_004ab1c8):
+			// the original replicant integrates its heading INCREMENTALLY from the
+			// CURRENT pose -- compose an exact rotation of (replicated yaw rate * dt)
+			// onto the rendered heading each frame -- and re-anchors it when a type-4
+			// resync lands.  It does NOT slerp toward a projected angular target: the
+			// engine Mover::DeadReckon lerp uses the shared lastUpdate/nextUpdate
+			// timebase, which the DENSE type-0 pose stream resets every frame while
+			// walking while RESTORING a stale orientation (the authentic case-0 strip)
+			// -- so the angular projection barely advances from a stale base and the
+			// slerp DRAGS the heading back each frame.  Measured: walking+turning, the
+			// peer yaw advanced at ~40% rate with half the frames stepping BACKWARD
+			// (the keyboard-steering skip); pure spin/walk never showed it (one stream).
+			// Save the heading, let DeadReckon own the LINEAR channel, then override
+			// the angular result with the original's incremental integration.
+			// ROOT-MOTION peer POSITION (authentic FUN_004ab1c8: the clip's travel
+			// drives the body between records; pose records re-anchor).  Save the
+			// position so the engine velocity-lerp result can be discarded below
+			// (BT_DR_POS=1 restores the velocity dead-reckon for A/B).
+			// DEFAULT: engine velocity dead-reckon (best-measured: ratio 1.0022).  The
+			// coupled root-motion experiment (BT_ROOT_POS=1) needs the MASTER-side
+			// gait mirror to stop the authority tug-of-war (measured ratio 1.86) --
+			// the completion path is mapped in the session notes.
+			static const int s_drPos = getenv("BT_DR_POS") ? 1 : 0;	// default 0 = authentic gait-coupled linear (BT_DR_POS=1 restores velocity)
+			Point3D replPrevPos = localOrigin.linearPosition;
+			Quaternion replPrevHeading = localOrigin.angularPosition;
+			DeadReckon(dt);							// engine reckoner: LINEAR position/velocity
+			if (angSyncLatch)
+			{
+				// type-4 arrived: re-anchor on the authoritative orientation
+				localOrigin.angularPosition = updateOrigin.angularPosition;
+				angSyncLatch = 0;
+			}
+			else
+			{
+				Vector3D replAngStep;
+				replAngStep.Multiply(updateVelocity.angularMotion, dt);
+				ReconQuatIntegrate(&localOrigin.angularPosition,
+								   &replPrevHeading, &replAngStep);	// exact FUN_00409f58
+			}
+			localOrigin.angularPosition.Normalize();
+			if (!s_drPos)
+				localOrigin.linearPosition = replPrevPos;	// root-motion mode: gait applies travel below
 			localToWorld = localOrigin;
 
+			// RENDER-vs-SIM decoupling probe: publish the heading the RENDER will
+			// actually draw (localToWorld == localOrigin here).  The render loop
+			// (L4VIDEO.cpp) logs this PER RENDERED FRAME; if it repeats the same
+			// value across render frames, the peer sim updates slower than the
+			// render draws -> the rotation stutters even though each sim update is
+			// smooth (which the per-update [replhdg] metric could not see).
+			{
+				extern volatile float gBTReplRenderYaw;
+				YawPitchRoll _rry; _rry = localOrigin.angularPosition;
+				gBTReplRenderYaw = (float)_rry.yaw;
+			}
+
+			// Lightweight dead-reckon smoothness probe (one flush/sec, cheap).
+			// PATH length (sum of |per-frame step|) vs NET displacement reveals
+			// jitter: a smooth walk has path==net; oscillation inflates path while
+			// net stays small.  avgHorizon is the lerp target distance in time.
+			if (getenv("BT_JIT"))
+			{
+				static bool  s_jinit = false;
+				static Point3D s_jprev, s_jnetA;
+				static float s_jacc = 0.0f, s_jpath = 0.0f, s_jmax = 0.0f, s_jhzn = 0.0f;
+				static int   s_jfr = 0;
+				if (s_jinit)
+				{
+					const float dx = (float)(localOrigin.linearPosition.x - s_jprev.x);
+					const float dz = (float)(localOrigin.linearPosition.z - s_jprev.z);
+					const float step = sqrtf(dx * dx + dz * dz);
+					s_jpath += step;
+					if (step > s_jmax) s_jmax = step;
+				}
+				else { s_jnetA = localOrigin.linearPosition; s_jinit = true; }
+				s_jprev = localOrigin.linearPosition;
+				s_jhzn += (float)(nextUpdate - lastPerformance);
+				s_jfr++; s_jacc += dt;
+				if (s_jacc >= 1.0f)
+				{
+					const float ndx = (float)(localOrigin.linearPosition.x - s_jnetA.x);
+					const float ndz = (float)(localOrigin.linearPosition.z - s_jnetA.z);
+					const float net = sqrtf(ndx * ndx + ndz * ndz);
+					DEBUG_STREAM << "[repljit] frames=" << s_jfr
+						<< " path=" << s_jpath << " net=" << net
+						<< " ratio=" << (net > 0.001f ? s_jpath / net : 0.0f)
+						<< " maxStep=" << s_jmax << " avgStep=" << (s_jpath / s_jfr)
+						<< " avgHorizon=" << (s_jhzn / s_jfr)
+						<< "\n" << std::flush;
+					s_jacc = 0.0f; s_jpath = 0.0f; s_jmax = 0.0f; s_jhzn = 0.0f;
+					s_jfr = 0; s_jnetA = localOrigin.linearPosition;
+				}
+			}
+
 			// REPLICANT GAIT (task #50): animate the peer mech's legs at the
 			// REPLICATED speed -- without this the replicant slides around as a
 			// frozen statue.  The master publishes worldLinearVelocity in every
@@ -1946,27 +2074,81 @@ void
 			MechControlsMapper *replMppr = MappingMapper();	// roster slot 0 (task #7)
 			if (!IsMechDestroyed() && replMppr != 0)
 			{
-				const Vector3D &wv = updateVelocity.linearMotion;
-				float spd = sqrtf((float)(wv.x * wv.x + wv.z * wv.z));
-				UnitVector zAxR;
-				localToWorld.GetFromAxis(Z_Axis, &zAxR);
-				const float fdot = -((float)wv.x * (float)zAxR.x
-								   + (float)wv.z * (float)zAxR.z);	// mech faces -Z
-				replMppr->speedDemand = (fdot < 0.0f) ? -spd : spd;
-				// REPLICANT TURN-STEP (user-reported: a turning peer
-				// statue-rotates while the local mech steps): the leg SM's
-				// Standing case arms the turn-in-place "trn" clip (state 4,
-				// mech2.cpp:590) from mppr->turnDemand -- which nothing fed on
-				// a replicant, so pivots never stepped.  Feed it from the
-				// REPLICATED yaw rate (updateVelocity.angularMotion.y, stored
-				// by Mover::ReadUpdateRecord from the master's localVelocity
-				// -- the same stream DeadReckon rotates the body with).  Only
-				// the +-0.05 threshold matters to the SM (the trn clip
-				// advances at fixed cadence), so a signed unit demand
-				// suffices; the deadband ignores dead-reckon jitter.
+				// AUTHENTIC LEG-CHANNEL DEMAND (decomp-verified, workflow wv1km7lvc D3):
+				// the leg channel FUN_004a5028 reads its speed demand from
+				// mapper->speedDemand == **(mech+0x128)+0x128 (part_012.c:11947/11975/
+				// 12028) and slews cadence + selects the stand->walk gate from it.  On a
+				// peer this MUST be the REPLICATED COMMANDED speed bodyTargetSpeed@0x6b4 --
+				// the master's own throttle-commanded speedDemand (mechmppr.cpp:749),
+				// stamped into every record (mech.cpp:2036, record->speedDemand) and read
+				// back on the peer (mech.cpp type-0 @1833, type-2 @1841/1848, type-3 @1871).
+				// It is the IDENTICAL value the master's leg channel consumes, so the peer
+				// clears the stand->walk gate exactly when the master does (the commanded
+				// speed is what makes the master walk, so it clears standSpeed by
+				// construction) and ramps cadence CONTINUOUSLY through accel/decel --
+				// cadence tracks travel like the master.  bodyTargetSpeed is signed
+				// (negative == reverse); it is 0 only while COASTING (thr=0), which
+				// authentically winds the gait down to stand, matching the master.
+				//
+				// The prior default DERIVED a noisy speed from the dead-reckoned velocity
+				// and PINNED it flat with a standSpeed*1.05 floor across the walk threshold
+				// -- the CONFIRMED leg-stutter/skip + cadence-vs-travel desync.  Retained
+				// behind BT_REPL_VEL for A/B comparison only.
+				static const int s_replVel = getenv("BT_REPL_VEL") ? 1 : 0;
+				if (s_replVel)
+				{
+					const Vector3D &wv = updateVelocity.linearMotion;
+					float spd = sqrtf((float)(wv.x * wv.x + wv.z * wv.z));
+					UnitVector zAxR;
+					localToWorld.GetFromAxis(Z_Axis, &zAxR);
+					const float fdot = -((float)wv.x * (float)zAxR.x
+									   + (float)wv.z * (float)zAxR.z);	// mech faces -Z
+					Scalar sd = (fdot < 0.0f) ? -spd : spd;
+					if (sd > standSpeed * 0.5f && sd < standSpeed * 1.05f)
+						sd = standSpeed * 1.05f;
+					replMppr->speedDemand = sd;
+				}
+				else
+				{
+					replMppr->speedDemand = bodyTargetSpeed;	// authentic replicated commanded speed
+				}
+				// AUTHENTIC PEER TURNING is NET-DRIVEN (decomp-verified D8): the angular
+				// slerp inside DeadReckon (MOVER.cpp:521-525) rotates
+				// localOrigin.angularPosition toward projectedOrigin.angularPosition from
+				// the replicated yaw rate (decomp angular path part_012.c:15001/15010).
+				// The leg SM's turn-in-place 'trn' clip is a MASTER-ONLY construct fed by
+				// the LIVE controls mapper; the old synthetic yawRate->turnDemand
+				// (quantized +-0.02) flickered the trn clip in/out as the noisy replicated
+				// rate crossed the band -> the jerky pivot / statue-rotate.  Do NOT
+				// synthesize it -- let the whole body rotate via the slerp.
+				// TURN-STEP (presentation of the authentic pivot): the authentic peer
+				// shows a stepping pivot because its BODY channel replays the master's
+				// replicated turn body-STATE (type-3 SetBodyAnimation, mech.cpp:1869).
+				// We run the LEG channel (D2 not switched), which has no replicated turn
+				// state, so we reproduce the visible turn-step by arming the leg SM's
+				// 'trn' clip from the replicated yaw rate.  The old feed used a bare
+				// +-0.02 threshold that CHATTERED the trn clip in/out as the noisy rate
+				// wandered near zero (the "jerky pivot", decomp-noted D8).  HYSTERESIS
+				// fixes that: enter the turn only above +-0.08 rad/s, hold it (the
+				// mapper's turnDemand persists frame-to-frame -- we are its only writer on
+				// a peer) until the rate clearly collapses below 0.03.  A steady turn sits
+				// well above both, so the clip never flickers.  (BT_REPL_NOTURN =
+				// decomp-strict net-driven rotation with NO step.)
 				const float yawRate = (float)updateVelocity.angularMotion.y;
-				replMppr->turnDemand = (yawRate >  0.02f) ? 1.0f
-									 : (yawRate < -0.02f) ? -1.0f : 0.0f;
+				static const int s_noTurn = getenv("BT_REPL_NOTURN") ? 1 : 0;
+				if (s_noTurn)
+				{
+					replMppr->turnDemand = 0.0f;
+				}
+				else
+				{
+					const float prevTd = (float)replMppr->turnDemand;	// last frame (our own write)
+					if (prevTd != 0.0f)								// turning: hold until the rate collapses
+						replMppr->turnDemand = (fabsf(yawRate) < 0.03f) ? 0.0f : prevTd;
+					else											// idle: start only on a clear turn
+						replMppr->turnDemand = (yawRate >  0.08f) ? 1.0f
+											 : (yawRate < -0.08f) ? -1.0f : 0.0f;
+				}
 				// Prime the same clip-advance scalars the master's gait block sets
 				// each frame -- uninitialized on a replicant they read 0, freezing
 				// the clip at advance-time dt*0 (observed: legState engaged at 11,
@@ -1986,7 +2168,305 @@ void
 				// once so a direct run-state entry can't slew from -4.3e8.
 				if (legCycleSpeed < -100.0f || legCycleSpeed > 200.0f)
 					legCycleSpeed = 0.0f;
-				(void)AdvanceLegAnimation(dt);		// joints only; travel = DeadReckon
+				// PEER POSE CHANNEL (decomp workflow w1s9ou02o -- the authentic fix): the
+				// 1995 peer posed the WHOLE skeleton from the BODY channel (FUN_004a5678)
+				// FOLLOWING the master's replicated body-anim state (bodyStateAlarm@0x728,
+				// set by the type-3 reader's SetBodyAnimation, mech.cpp:1913) + replicated
+				// bodyTargetSpeed@0x6b4.  The LEG channel (FUN_004a5028) is DEAD CODE.  Our
+				// port resurrected the leg SM as the peer's poser fed a LOCALLY re-derived
+				// commanded speed, and the leg SM's phase-independent pre-switch wind-down
+				// (mech2.cpp:560-568, force-jump {6,7,8,9}->stand when legCycleSpeed<=0) makes
+				// the peer SKIP the master's decel state 8 and snap to stand while the body
+				// coasts (the 'slid forward after legs stopped' bug).  The body channel has
+				// NO such wind-down and follows the replicated decel state, playing the
+				// master's exact clips.  Swapping the peer to the body channel RESTORES the
+				// original single-channel design (no new netcode).  BT_PEER_LEGCH=1 = old.
+				static const int s_peerLegCh = getenv("BT_PEER_LEGCH") ? 1 : 0;
+				// TRUE-MIRROR CADENCE: drive the body clip from the ACTUAL replicated ground
+				// speed so the animation phase tracks the master exactly instead of drifting
+				// via the local bodyCycleSpeed slew (the accel/decel hesitation).  Consumed in
+				// AdvanceBodyAnimation walk/reverse.  -1 disables -> authentic slew.
+				if (!s_peerLegCh && !getenv("BT_NO_MIRROR_CAD"))
+				{
+					const Vector3D &mcv = updateVelocity.linearMotion;
+					peerMirrorSpeed = (Scalar)sqrtf((float)(mcv.x * mcv.x + mcv.z * mcv.z));
+				}
+				else
+					peerMirrorSpeed = -1.0f;
+				// TURN-STEP ARMING for the body channel: the body Standing case only enters
+				// walk/reverse/stand -- it never arms the turn-in-place clip (state 4); on the
+				// master that arming comes from the LEG Standing case cross-arming both
+				// channels (mech2.cpp:937 note), which the peer no longer runs.  Arm/exit the
+				// body turn state here from the replicated turn (replMppr->turnDemand, from the
+				// replicated yaw rate + hysteresis above): standing + turning -> state 4 (body
+				// case 4 then advances the trn clip -> the peer STEPS through the pivot); turn
+				// stops -> back to Standing.  Walk/reverse transitions still own their exits.
+				if (!s_peerLegCh)
+				{
+					const int  bs = (int)bodyStateAlarm.GetLevel();
+					const bool turning = (replMppr->turnDemand > 0.05f
+									   || replMppr->turnDemand < -0.05f);
+					if (turning && bs == 0)			// standing + turning -> enter turn
+						SetBodyAnimation(4);
+					else if (!turning && bs == 4)	// turn stopped -> back to stand
+						SetBodyAnimation(0);
+				}
+				const Scalar replLegAdv = s_peerLegCh
+					? AdvanceLegAnimation(dt)			// old: re-derived leg SM
+					: AdvanceBodyAnimation(dt, 1);		// authentic: body channel, mj=1 poses skeleton
+				// AUTHENTIC coupled position (mirror of the master's world-step at
+				// mech4.cpp:3325-3336 == Mech::IntegrateMotion tail @004ab1c8): between
+				// records the body advances by the CLIP'S OWN travel rotated by the
+				// heading -- feet and ground are locked BY CONSTRUCTION, so cadence-vs-
+				// travel mismatch (the speed-change glitch) is structurally impossible.
+				// A pose record re-anchors onto the authoritative position
+				// (poseSyncLatch, armed by every type-0 read).  adv is SIGNED by the SM
+				// (reverse clips return negative travel; master dir==1.0 in SM mode).
+				if (!s_drPos)
+				{
+					// POSE-SYNC ERROR-PROPORTIONAL ABSORPTION: track the error to the
+					// received authority (updateOrigin) and bleed it into localOrigin at a
+					// rate that scales with the error, so a small steady offset is absorbed
+					// gently (no foot-pop) while a large speed-change drift is caught fast.
+					// The residual snap came from two sources: (a) a fixed slow ~1/3s decay
+					// let drift reach 3-11u during accel/decel; (b) a hard ground snap popped
+					// because records are not perfectly dense on this relay.  Error-scaled
+					// absorption is the stable middle: k grows from ~0.15/frame at small
+					// error toward ~0.6 at large error.  (Records re-measure the error every
+					// frame they arrive, so this converges to authority within a few frames.)
+					{
+						Vector3D rmErr;
+						rmErr.Subtract(updateOrigin.linearPosition, localOrigin.linearPosition);
+						poseSyncLatch = 0;
+						const float eMag = (float)rmErr.Length();
+						float k = 0.15f + eMag * 0.15f;			// error-proportional catch-up
+						if (k > 0.6f) k = 0.6f;
+						// DIAG (BT_SNAPLOG, task #50): the peer drift = |authority - dead-reckon|
+						// absorbed this frame -- the "snap" magnitude.  Log > 0.5u so an accel/decel
+						// soak (BT_DRIVE_SWEEP0) measures the residual.
+						static const int s_snapLog = getenv("BT_SNAPLOG") ? 1 : 0;
+						if (s_snapLog && eMag > 0.5f)
+							DEBUG_STREAM << "[snap] drift=" << eMag << " k=" << k
+								<< " legAdv=" << replLegAdv << "\n" << std::flush;
+						// AT-REST snap (user "gliding stops"): when the legs have wound down
+						// (replLegAdv ~0), gliding the body to absorb the residual offset is
+						// VISIBLE because no leg motion masks it.  With the feet planted a
+						// sub-unit correction is invisible, so resolve it immediately instead
+						// of gliding it in over several frames.  Only when the offset is small
+						// (a large offset at rest = a real teleport that should still ease).
+						const Logical atRest = ((replLegAdv < 0.05f && replLegAdv > -0.05f)
+											 && eMag < 1.0f);
+						if (atRest) k = 1.0f;
+						localOrigin.linearPosition.x += rmErr.x * k;
+						localOrigin.linearPosition.y += rmErr.y * k;
+						localOrigin.linearPosition.z += rmErr.z * k;
+					}
+					if (replLegAdv != 0.0f)
+					{
+						Vector3D rmLocal(0.0f, 0.0f, -replLegAdv);	// forward = -Z, per-frame DISTANCE
+						Matrix34 rmOrient;
+						Matrix34::FromQuaternion(&rmOrient, &localOrigin.angularPosition);
+						Vector3D rmWorld;
+						FUN_00408744(&rmWorld, (Scalar *)&rmLocal, &rmOrient);
+						localOrigin.linearPosition.x += rmWorld.x;
+						localOrigin.linearPosition.y += rmWorld.y;
+						localOrigin.linearPosition.z += rmWorld.z;
+					}
+					localToWorld = localOrigin;				// refresh with the coupled position
+				}
+
+				// SLIDE probe (BT_SLIDE): per-frame, log when the peer position MOVES
+				// while its legs are in STAND (legState 0) -- the user's "sliding after
+				// legs stopped".  Reports move magnitude, offset to authority, leg state.
+				if (getenv("BT_SLIDE"))
+				{
+					static Point3D s_slPrev; static int s_slInit = 0;
+					const int ls = getenv("BT_PEER_LEGCH") ? (int)legStateAlarm.GetLevel() : (int)bodyStateAlarm.GetLevel();
+					if (s_slInit)
+					{
+						const float dx = (float)(localOrigin.linearPosition.x - s_slPrev.x);
+						const float dz = (float)(localOrigin.linearPosition.z - s_slPrev.z);
+						const float mv = sqrtf(dx * dx + dz * dz);
+						if (ls == 0 && mv > 0.02f)		// standing but moving = slide
+						{
+							Vector3D off; off.Subtract(updateOrigin.linearPosition, localOrigin.linearPosition);
+							DEBUG_STREAM << "[slide] move=" << mv
+								<< " legAdv=" << replLegAdv
+								<< " offToAuth=" << (float)off.Length()
+								<< " legState=" << ls << "\n" << std::flush;
+						}
+					}
+					s_slPrev = localOrigin.linearPosition; s_slInit = 1;
+				}
+
+				// PEER-DRIFT probe (BT_MIRDIV, 1s max): how far the peer's coupled
+				// position wanders from the last-received authority (updateOrigin)
+				// before a record re-anchors it -- the other end of the snap.
+				if (getenv("BT_MIRDIV"))
+				{
+					static float s_pdAcc = 0.0f, s_pdMax = 0.0f;
+					Vector3D d; d.Subtract(localOrigin.linearPosition, updateOrigin.linearPosition);
+					const float dl = (float)d.Length();
+					if (dl > s_pdMax) s_pdMax = dl;
+					s_pdAcc += dt;
+					if (s_pdAcc >= 1.0f)
+					{
+						DEBUG_STREAM << "[peerdrift] maxDriftFromAuthority=" << s_pdMax
+							<< " replLegAdv=" << replLegAdv << "\n" << std::flush;
+						s_pdAcc = 0.0f; s_pdMax = 0.0f;
+					}
+				}
+
+				// GAIT-EVENNESS probe (BT_GAITEV, 1s stats): the metric of the VISIBLE
+				// speed-change glitch -- per-frame leg-clip advance regularity + leg-state
+				// transition (flap) rate on the peer.  Position dead-reckons smoothly
+				// regardless; the churn shows in the LEGS.
+				if (getenv("BT_GAITEV"))
+				{
+					static float s_gvPrevF = -1.0f, s_gvAcc = 0.0f, s_gvSum = 0.0f, s_gvMax = 0.0f;
+					static int   s_gvN = 0, s_gvBack = 0, s_gvTrans = 0, s_gvPrevSt = -1;
+					static float s_gvDemPrev = 0.0f; static int s_gvDemChg = 0;
+					const int _pb = getenv("BT_PEER_LEGCH") ? 1 : 0;
+					const float gf = _pb ? (float)legAnimation.currentFrame : (float)bodyAnimation.currentFrame;
+					const int   gs = _pb ? (int)legStateAlarm.GetLevel() : (int)bodyStateAlarm.GetLevel();
+					if (s_gvPrevF >= 0.0f)
+					{
+						float df = gf - s_gvPrevF;
+						if (df < -5.0f) df += 20.0f;			// clip wrap heal (approx)
+						const float adf = (df < 0.0f) ? -df : df;
+						s_gvSum += adf; if (adf > s_gvMax) s_gvMax = adf;
+						if (df < 0.0f) s_gvBack++;
+						s_gvN++;
+					}
+					if (s_gvPrevSt >= 0 && gs != s_gvPrevSt) s_gvTrans++;
+					if ((float)bodyTargetSpeed != s_gvDemPrev) { s_gvDemChg++; s_gvDemPrev = (float)bodyTargetSpeed; }
+					s_gvPrevF = gf; s_gvPrevSt = gs; s_gvAcc += dt;
+					if (s_gvAcc >= 1.0f && s_gvN > 0)
+					{
+						DEBUG_STREAM << "[gaitev] frmAvg=" << (s_gvSum / s_gvN)
+							<< " frmMax=" << s_gvMax
+							<< " back=" << s_gvBack << "/" << s_gvN
+							<< " stateFlips/s=" << s_gvTrans
+							<< " demChanges/s=" << s_gvDemChg
+							<< " state=" << gs << "\n" << std::flush;
+						s_gvAcc = 0.0f; s_gvSum = 0.0f; s_gvMax = 0.0f; s_gvN = 0; s_gvBack = 0; s_gvTrans = 0; s_gvDemChg = 0;
+					}
+				}
+
+				// TURN-STEP rate probe (BT_TRNRATE, 0.5s): body rotation rate vs trn clip advance.
+				if (getenv("BT_TRNRATE"))
+				{
+					static bool  s_tinit = false;
+					static float s_tYaw = 0.0f, s_tFrm = 0.0f, s_tAcc = 0.0f, s_tRot = 0.0f, s_tAdv = 0.0f;
+					YawPitchRoll _typ; _typ = localOrigin.angularPosition;
+					const float yaw = (float)_typ.yaw, frm = (float)legAnimation.currentFrame;
+					if (s_tinit)
+					{
+						float dy = yaw - s_tYaw; if (dy > 3.14159f) dy -= 6.28319f; if (dy < -3.14159f) dy += 6.28319f;
+						s_tRot += (dy < 0.0f) ? -dy : dy;
+						const float df = frm - s_tFrm;
+						if (df > 0.0f) s_tAdv += df;
+					}
+					s_tYaw = yaw; s_tFrm = frm; s_tinit = true;
+					s_tAcc += dt;
+					if (s_tAcc >= 0.5f)
+					{
+						DEBUG_STREAM << "[trnrate] bodyRot/s=" << (s_tRot / s_tAcc) << "rad"
+							<< " legFrm/s=" << (s_tAdv / s_tAcc)
+							<< " legState=" << (int)legStateAlarm.GetLevel()
+							<< " turnDemand=" << MappingMapper()->turnDemand << "\n" << std::flush;
+						s_tAcc = 0.0f; s_tRot = 0.0f; s_tAdv = 0.0f;
+					}
+				}
+
+				// Cadence-vs-travel sync probe (0.25s, ~4 flush/s -- cheap).  Compares
+				// the leg CADENCE input (bodyTargetSpeed / legCycleSpeed) against the
+				// ACTUAL dead-reckoned ground speed; if the legs are in sync the two
+				// track together and legFrm advances monotonically.
+				if (getenv("BT_ANIM"))
+				{
+					static bool  s_ainit = false;
+					static Point3D s_aprev;
+					static float s_aacc = 0.0f, s_apath = 0.0f;
+					if (s_ainit)
+					{
+						const float dx = (float)(localOrigin.linearPosition.x - s_aprev.x);
+						const float dz = (float)(localOrigin.linearPosition.z - s_aprev.z);
+						s_apath += sqrtf(dx * dx + dz * dz);
+					}
+					s_aprev = localOrigin.linearPosition; s_ainit = true;
+					s_aacc += dt;
+					if (s_aacc >= 0.25f)
+					{
+						DEBUG_STREAM << "[anim] cmd=" << bodyTargetSpeed
+							<< " drSpeed=" << (s_apath / s_aacc)
+							<< " legCyc=" << legCycleSpeed
+							<< " legState=" << (int)legStateAlarm.GetLevel()
+							<< " legFrm=" << legAnimation.currentFrame
+							<< "\n" << std::flush;
+						s_aacc = 0.0f; s_apath = 0.0f;
+					}
+				}
+
+				if (getenv("BT_REPL_TRN"))
+				{
+					static float s_rt = 0.0f; s_rt += dt;
+					if (s_rt >= 0.15f)
+					{
+						s_rt = 0.0f;
+						DEBUG_STREAM << "[repltrn] yawRate=" << yawRate
+							<< " turnDemand=" << replMppr->turnDemand
+							<< " legState=" << (int)legStateAlarm.GetLevel()
+							<< " bodyState=" << (int)bodyStateAlarm.GetLevel()
+							<< " legFrm=" << legAnimation.currentFrame
+							<< " bodyFrm=" << bodyAnimation.currentFrame
+							<< " spd=" << replMppr->speedDemand
+							<< " tgt=" << bodyTargetSpeed << "\n" << std::flush;
+					}
+				}
+				// PER-FRAME heading trace (BT_REPL_HDG, choppy-spin diagnosis): the
+				// replicant's rendered yaw each frame + dt.  A smooth dead-reckoned
+				// spin advances ~yawRate*dt every frame; choppiness shows as heading
+				// STALLS followed by SNAPS (records arriving without integration
+				// between them).
+				if (getenv("BT_REPL_HDG") && yawRate != 0.0f)
+				{
+					YawPitchRoll rh, ph, uh;
+					rh = localOrigin.angularPosition;
+					ph = projectedOrigin.angularPosition;
+					uh = updateOrigin.angularPosition;
+					DEBUG_STREAM << "[replhdg] yaw=" << (Scalar)rh.yaw
+						<< " proj=" << (Scalar)ph.yaw
+						<< " upd=" << (Scalar)uh.yaw
+						<< " lp-lu=" << (lastPerformance.ticks - lastUpdate.ticks)
+						<< " nu-lp=" << (nextUpdate.ticks - lastPerformance.ticks)
+						<< " yawRate=" << yawRate << " dt=" << dt << "\n" << std::flush;
+				}
+
+				// PER-FRAME travel/animation coupling probe (BT_REPL_MOV, user:
+				// "slides forward before it steps"): position vs the dead-reckon target
+				// vs the derived speed vs the leg SM state, every frame there is
+				// replicated motion.  Reveals travel-vs-animation lag + lerp-gap jitter.
+				if (getenv("BT_REPL_MOV"))
+				{
+					const Scalar uvx = (Scalar)updateVelocity.linearMotion.x;
+					const Scalar uvz = (Scalar)updateVelocity.linearMotion.z;
+					const Scalar umag = (Scalar)sqrtf(uvx*uvx + uvz*uvz);
+					if (umag > 0.01f || replMppr->speedDemand != 0.0f)
+						DEBUG_STREAM << "[replmov]"
+							<< " pos=(" << localOrigin.linearPosition.x << ","
+							<< localOrigin.linearPosition.z << ")"
+							<< " proj=(" << projectedOrigin.linearPosition.x << ","
+							<< projectedOrigin.linearPosition.z << ")"
+							<< " uvel=" << umag
+							<< " spd=" << replMppr->speedDemand
+							<< " legState=" << (int)legStateAlarm.GetLevel()
+							<< " legFrm=" << legAnimation.currentFrame
+							<< " standSp=" << standSpeed
+							<< " walkStr=" << walkStrideLength
+							<< " nu-lp=" << (nextUpdate.ticks - lastPerformance.ticks)
+							<< " dt=" << dt << "\n" << std::flush;
+				}
 
 				// REPLICANT BEAMS (task #51): the emitters carry live replicated
 				// discharge state (Emitter::ReadUpdateRecord); draw them with the
@@ -2127,6 +2607,10 @@ void
 						const int mNow = focused && (pAsync('M') & dn) ? 1 : 0;
 						if (mNow && !sPrevM) gBTModeCycle = 1;	// edge -> one cycle
 						sPrevM = mNow;
+						// (task #68) 'V' HELD = look behind (the pod's rear-view
+						// button; releases back to the forward view).  Rear-mounted
+						// weapons (blackhawk/owens back racks) fire only in it.
+						gBTLookBehind = focused && (pAsync('V') & dn) ? 1 : 0;
 						const int tw = (focused && (pAsync('E') & dn) ? 1 : 0)
 									 - (focused && (pAsync('Q') & dn) ? 1 : 0);
 						static float sTwist = 0.0f;
@@ -2271,6 +2755,35 @@ void
 								: (r < 1.0f ? sAutoDrive * r : sAutoDrive);
 						}
 					}
+					// BT_DRIVE_SWEEP=<period>: triangle-sweep the FORCED throttle
+					// 0.2..0.9 -- sweeps the ACTUAL drive velocity AND (via mechmppr's
+					// forced key_throttle) the mapper demand together, the true
+					// keyboard accel/decel regime.  BT_FORCE_STEP=1 quantizes it to
+					// the RIO Ranger 0.05 grid (the authentic stepped input shape).
+					{
+						static float s_dsP = -1.0f, s_dsClock = 0.0f;
+						static int   s_dsStep = -1;
+						if (s_dsP < 0.0f)
+						{
+							const char *v = getenv("BT_DRIVE_SWEEP");
+							s_dsP = v ? (float)atof(v) : 0.0f;
+							s_dsStep = getenv("BT_FORCE_STEP") ? 1 : 0;
+						}
+						if (s_dsP > 0.0f)
+						{
+							s_dsClock += dt;
+							float ph  = fmodf(s_dsClock, 2.0f * s_dsP) / s_dsP;
+							float tri = (ph < 1.0f) ? ph : (2.0f - ph);
+							// BT_DRIVE_SWEEP0=1: sweep 0.0..0.7 (through STOP each cycle -- the
+							// stand<->walk gauntlet: walk-entry, came-to-rest sends, type-3 stomps).
+							static int s_dsZero = -1;
+							if (s_dsZero < 0) s_dsZero = getenv("BT_DRIVE_SWEEP0") ? 1 : 0;
+							float thr = s_dsZero ? (0.7f * tri) : (0.2f + 0.7f * tri);
+							if (s_dsStep)
+								thr = floorf(thr / 0.05f + 0.5f) * 0.05f;
+							gBTDrive.forcedThrottle = thr;
+						}
+					}
 				}
 				else if (sGotoDrive)
 				{
@@ -2297,6 +2810,45 @@ void
 
 			const int fwd = gBTDrive.keyFwd, back = gBTDrive.keyBack;
 			if (!fwd && !back) sDetent = 0;				// keys released -> detent re-arms
+			// GAIT DETENT (keyboard accommodation, 2026-07-16): the gait SM has NO
+			// stable state for a demand between the walk cycle's cap
+			// (walkStrideLength @0x534) and the run cycle's engage speed
+			// (reverseSpeedMax @0x538 = the walk->run transition clip's exit
+			// speed).  A demand PARKED in that band hunts walk -> shift-up ->
+			// shift-down forever, firing the authored EngineShiftFwd/Rev sounds
+			// each swing (binary-verified: the BodyClipFinished thresholds at
+			// 0x4a6f11/0x4a6fc7 + the continuous FUN_004afd10 demand formula
+			// reproduce the hunt with all-authentic data).  The pod's PHYSICAL
+			// throttle lever plausibly rested only at mechanical notches -- the
+			// software path is notch-free (pod-hardware.md), so the notches, if
+			// real, lived in the quadrant hardware [T4].  Reproduce that feel:
+			// when the keys REST, snap the lever out of the dead band to the
+			// nearer edge.  Sweeping THROUGH the band while a key is held stays
+			// continuous -- that is an authentic moving lever, and the one
+			// transition it triggers is the authentic shift.
+			if (!fwd && !back && sLever > 0.0f
+				&& walkStrideLength > 0.0f
+				&& reverseSpeedMax > walkStrideLength
+				&& reverseStrideLength >= reverseSpeedMax)
+			{
+				const float max_demand = reverseStrideLength * forwardThrottleScale;
+				if (max_demand > 0.0f)
+				{
+					const float band_lo = walkStrideLength / max_demand;
+					// margin: the run cont-check is tgt >= cap, so land the demand
+					// a hair ABOVE the engage speed against float rounding
+					const float band_hi = reverseSpeedMax / max_demand + 0.002f;
+					if (sLever > band_lo && sLever < band_hi)
+					{
+						const float snapped =
+							(sLever - band_lo < (band_hi - band_lo) * 0.5f) ? band_lo : band_hi;
+						{ static int s_dLog = 0; if (getenv("BT_GAIT_TRACE") && s_dLog++ < 40)
+							DEBUG_STREAM << "[gaitdetent] lever " << sLever << " in dead band ["
+								<< band_lo << "," << band_hi << ") -> " << snapped << "\n" << std::flush; }
+						sLever = snapped;
+					}
+				}
+			}
 			float sweep = ((fwd ? 1.0f : 0.0f) - (back ? 1.0f : 0.0f)) * kLeverRate * dt;
 			if (sweep != 0.0f && !sDetent)
 			{
@@ -2329,8 +2881,37 @@ void
 				else                     sStick  = 0.0f;
 			}
 
-			gBTDrive.throttle = sLever;
-			gBTDrive.turn     = sStick;
+			// RIO-GRID PUBLISH (authentic input shaping; decomp workflow w0odszxro):
+			// the pod's analog lever/stick reached the mapper through the RIO Ranger
+			// (800 ADC counts, 0.05 deadband -- L4RIO.cpp:801), so the DEMAND the 1995
+			// machinery consumed moved in coarse, settled STEPS with silence between
+			// them -- one type-2 speed record per step, and each gait threshold
+			// (standSpeed etc., zero hysteresis) crossed ONCE per maneuver.  Our
+			// keyboard integrator sweeps CONTINUOUSLY (kLeverRate every frame of a
+			// key-hold): ~86 records per accel, demand DWELLING on the knife edges ->
+			// transition-clip churn -- the speed-change peer glitch.  Publish on the
+			// Ranger's own 0.05 grid: internal lever feel unchanged, published demand
+			// steps like the real hardware (a bucket holds ~4 frames at kLeverRate, so
+			// the send gate self-closes between steps).  Also kills -epsilon reverse
+			// publishes from rest (bucket rounds to 0 until the lever passes -0.025;
+			// authentic reverse is a BUTTON sign-flip, never a sweep through zero).
+			// DEFAULT: CONTINUOUS publish (authentic -- the pod lever was analog,
+			// 800-count ADC ~= continuous; empirical A/B found NO gait/position
+			// difference between swept and stepped demand after the clock-guard +
+			// heading-integrator fixes, so the grid gains nothing and makes the
+			// DRIVE step unauthentically).  BT_GRID_LEVER=1 keeps the 0.05-grid
+			// variant for experiments.
+			static const int s_gridLever = getenv("BT_GRID_LEVER") ? 1 : 0;
+			if (s_gridLever)
+			{
+				gBTDrive.throttle = floorf(sLever / 0.05f + 0.5f) * 0.05f;
+				gBTDrive.turn     = floorf(sStick / 0.05f + 0.5f) * 0.05f;
+			}
+			else
+			{
+				gBTDrive.throttle = sLever;
+				gBTDrive.turn     = sStick;
+			}
 		}
 
 		// DEATH GATE (task #52): a DESTROYED mech takes no pilot input -- kill
@@ -2376,6 +2957,13 @@ void
 				s_spawnAt = 2;
 				localOrigin.linearPosition.x = s_sx;
 				localOrigin.linearPosition.z = s_sz;
+				// FIX (user-reported: teleport embeds the mech in sloped terrain):
+				// BT_SPAWN_AT set only X/Z, keeping the OLD (dropzone) Y -- wrong for
+				// the new ground height.  Lift the mech WELL ABOVE local terrain so the
+				// authentic per-frame ground SNAP (BoxTree FindBoundingBoxUnder, no
+				// gravity) settles it onto the surface next frame.  The snap only
+				// lowers, so it must start above the surface, not below.
+				localOrigin.linearPosition.y += 500.0f;
 				if (s_haveH)
 				{
 					gDriveHeading = s_sh;
@@ -2780,7 +3368,21 @@ void
 					// while the animation transitioned gradually (the "physics don't
 					// line up with the animation" desync).  Signed, the SM decelerates
 					// through stop -> reverse-entry exactly like the leg channel.
-					if (s_realControls && MappingMapper() != 0)
+					// BT_MASTER_GAITMIRROR: the invisible mj=0 body channel becomes the
+					// PEER's predictor, so it must slew toward the LAST-SENT commanded
+					// speed (which the record writers stamp into bodyTargetSpeed@0x6b4 on
+					// each send, mech.cpp), NOT the live mapper demand.  Leaving
+					// bodyTargetSpeed at last-sent re-activates the authentic type-2
+					// deadband and makes the mirror model exactly what the peer computes.
+					// The master's VISIBLE motion uses the LEG channel reading live demand
+					// independently, so this does not change what the local player sees.
+					// (Default OFF: live overwrite preserved.)
+					static const int s_gaitMirror = getenv("BT_NO_MASTER_GAITMIRROR") ? 0 : 1;	// default ON (authentic coupled)
+					if (s_gaitMirror)
+					{
+						/* leave bodyTargetSpeed at the last-sent value */
+					}
+					else if (s_realControls && MappingMapper() != 0)
 						bodyTargetSpeed = MappingMapper()->speedDemand;
 					else
 						bodyTargetSpeed = ((throttle < 0.0f) ? -1.0f : 1.0f)
@@ -2847,6 +3449,7 @@ void
 						// BT_BODY_MJ=1 restores the old double-writer for A/B.
 						static const int s_bodyMj = BTEnvOn("BT_BODY_MJ", 0);
 						adv    = AdvanceBodyAnimation(dt, s_bodyMj);	// channel B: replication projection (mj=0)
+						mirrorBodyAdv = adv;					// stash for the send-mirror gait advance
 						legAdv = AdvanceLegAnimation(dt);		// channel A: local sim -- pose + travel
 					}
 					else
@@ -2990,6 +3593,21 @@ void
 				// impact freezes travel as before.)
 				const Scalar travelAdv = s_realControls ? legAdv : adv;
 				const Scalar localAdv = travelAdv * dir;
+				// MASTER-SLIDE probe (BT_SLIDE): does the MASTER itself advance while its
+				// legs are in STAND (legState 0)?  If yes -> authentic momentum coast, the
+				// peer correctly mirrors it.  If the master travelAdv reaches 0 exactly
+				// when legState reaches 0 -> the master stops clean and the peer's stand-
+				// slide is a peer leg-SM-too-fast desync.  Logs the decel profile.
+				if (getenv("BT_SLIDE"))
+				{
+					const int mls = (int)legStateAlarm.GetLevel();
+					const float ta = (float)(travelAdv < 0 ? -travelAdv : travelAdv);
+					if (ta > 0.005f)		// master still moving
+						DEBUG_STREAM << "[mslide] travelAdv=" << travelAdv
+							<< " legState=" << mls
+							<< " legCycle=" << legCycleSpeed
+							<< " thr=" << throttle << "\n" << std::flush;
+				}
 				linearSpeed = (localAdv < 0.0f ? -localAdv : localAdv) * invDt;	// forward ground speed -> LinearSpeed gauge
 				Vector3D localVel(0.0f, 0.0f, -localAdv * invDt);	// exact frame distance as velocity
 				Matrix34 orient;									// rotation from the heading (set @ line ~626)
@@ -3112,9 +3730,54 @@ void
 			Scalar fwdSpeed = (Scalar)sqrtf(
 				worldLinearVelocity.x * worldLinearVelocity.x +
 				worldLinearVelocity.z * worldLinearVelocity.z);
-			localVelocity.linearMotion  = Vector3D(0.0f, worldLinearVelocity.y, -fwdSpeed);
+			// SMOOTH the PUBLISHED velocity (localVelocity feeds the audio speed
+			// triggers, the update records, and the impact gate -- NOT the physics
+			// worldLinearVelocity above).  The raw per-frame derivative pulses per
+			// stride (gait acceleration + ground-snap bob): at walking speed the
+			// oscillation straddled the authored idle-hum band edge (speed 20) and
+			// Start/Stop-flapped the engine ambience on every footfall (heard as a
+			// static tick per step).  ~0.25s exponential filter kills the stride
+			// ripple while tracking real speed changes within a couple of strides.
+			// AUTHENTIC [T1]: the binary's Mech::Execute (FUN_004ab430) runs the
+			// localVelocity components through AverageOf running-average filters
+			// (part_012.c:15169-15179) -- the original smoothed the published
+			// velocity the same way; this filter reconstructs that stage.
+			{
+				Scalar alpha = dt / (dt + 0.25f);
+				fwdSpeedFiltered  += alpha * (fwdSpeed - fwdSpeedFiltered);
+				vertSpeedFiltered += alpha * (worldLinearVelocity.y - vertSpeedFiltered);
+				// (AUDIO_FIDELITY F19) publish localAcceleration EXACTLY as the
+				// binary does: FIVE 15-sample RING BUFFERS hold the RAW velocity
+				// components + dt (ctor part_012.c:9836-9840), and the accel is
+				// the frame-to-frame derivative of the ring MEAN over the mean
+				// dt (part_012.c:15169-15195).  The ring mean keeps jittering
+				// as samples rotate, so the accel ATTRIBUTE changes on every
+				// watcher poll -- feeding the authored N=30 footstep smoother
+				// continuously (ctl100 |accel| [0,10] -> the per-stride kick on
+				// top of ctl101's 0.4 moving base).  A first cut derived accel
+				// from the 0.25s-filtered velocity: its derivative goes
+				// epsilon-flat between strides, the watcher stopped firing, and
+				// the smoother took 10-20 s to warm from its fill=0 (the
+				// late-footsteps bug).  NOTE: the RAW components feed only the
+				// rings; the PUBLISHED velocity keeps the 0.25s filter (a [T3]
+				// accommodation for our ground-snap ripple, see above).
+				// (the ring push itself lives in the PerformAndWatch tail so it
+				// provably runs EVERY frame -- this conditional path skips
+				// frames in some gait states, which starved the accel watcher)
+			}
+			localVelocity.linearMotion  = Vector3D(0.0f, vertSpeedFiltered, -fwdSpeedFiltered);
 			localVelocity.angularMotion = Vector3D(0.0f, turn * authTurnRate, 0.0f);
 
+			// MASTER twin of [replmov]: the velocity this mech PUBLISHES vs its own
+			// leg state -- compare the master ramp to the replicant response.
+			if (getenv("BT_REPL_MOV") && (fwdSpeed > 0.01f || throttle != 0.0f))
+				DEBUG_STREAM << "[mastervel] fwdSpeed=" << fwdSpeed
+					<< " thr=" << throttle
+					<< " legState=" << (int)legStateAlarm.GetLevel()
+					<< " pos=(" << localOrigin.linearPosition.x << ","
+					<< localOrigin.linearPosition.z << ")"
+					<< " dt=" << dt << "\n" << std::flush;
+
 			// CRASH motion suppression (spec: the binary zeroes localVelocity while
 			// crashed).  While the stagger clip (legState 0x20) plays, freeze the
 			// velocity so a knocked-down mech does not creep back into the obstacle and
@@ -3319,11 +3982,68 @@ void
 			// the PEER's event queue busy, so its CreatingMission->LoadingMission
 			// quiet-timeout never fired -- the pods deadlocked pre-launch.  The real
 			// system never moves before launch, so the gate is faithful.)
-			(this->*deadReckoner)();
+			// SEND-MIRROR advance: model where the PEER believes this mech is, so the
+			// deadband fires exactly when the peer would drift.  Authentic (binary
+			// FUN_004a9b5c @0x4aab9c): advance projectedOrigin by IntegrateMotion(mj=0)
+			// -- the SAME gait predictor the peer runs -- fed the LAST-SENT commanded
+			// speed.  Our default mirror uses the engine constant-velocity deadReckoner
+			// (AcceleratedDeadReckoner), which does NOT model a gait-driven peer -> the
+			// deadband under-sends and the coupled peer drifts (measured).  With
+			// BT_MASTER_GAITMIRROR: increment projectedOrigin.linear by the mj=0 body
+			// channel's travel (mirrorBodyAdv, = the peer's predicted stride) rotated by
+			// the mirror heading, and integrate the heading by the last-sent angular
+			// velocity.  Re-seeded to localOrigin on each send by the record writers'
+			// projectedOrigin re-base, so this is incremental-from-last-send, exactly the
+			// peer's IntegrateMotion.  (Default OFF: constant-velocity deadReckoner.)
+			static const int s_gaitMirrorSend = getenv("BT_NO_MASTER_GAITMIRROR") ? 0 : 1;	// default ON
+			if (s_gaitMirrorSend)
+			{
+				Vector3D mAng;
+				mAng.Multiply(updateVelocity.angularMotion, dt);	// last-sent yaw rate
+				ReconQuatIntegrate(&projectedOrigin.angularPosition,
+								   &projectedOrigin.angularPosition, &mAng);
+				projectedOrigin.angularPosition.Normalize();
+				if (mirrorBodyAdv != 0.0f)
+				{
+					Vector3D mLocal(0.0f, 0.0f, -mirrorBodyAdv);	// forward = -Z, frame distance
+					Matrix34 mOrient;
+					Matrix34::FromQuaternion(&mOrient, &projectedOrigin.angularPosition);
+					Vector3D mWorld;
+					FUN_00408744(&mWorld, (Scalar *)&mLocal, &mOrient);
+					projectedOrigin.linearPosition.x += mWorld.x;
+					projectedOrigin.linearPosition.y += mWorld.y;
+					projectedOrigin.linearPosition.z += mWorld.z;
+				}
+			}
+			else
+			{
+				(this->*deadReckoner)();
+			}
 			Vector3D error;
 			error.Subtract(
 				projectedOrigin.linearPosition,
 				localOrigin.linearPosition);
+			// MIRROR-DIVERGENCE probe (BT_MIRDIV, 1s max): how far the master's
+			// send-mirror (projectedOrigin, body-channel gait) drifts from the true
+			// localOrigin (leg-channel gait) BEFORE a send fires.  This is the source
+			// of the peer's residual snap -- quantifies the leg-vs-body channel shape
+			// mismatch.  posDb (~0.55u) is the send threshold; anything the mirror
+			// over/under-shoots beyond it is the channel divergence.
+			if (getenv("BT_MIRDIV"))
+			{
+				static float s_mdAcc = 0.0f, s_mdMax = 0.0f, s_mdAdvB = 0.0f, s_mdAdvL = 0.0f;
+				const float e = (float)error.Length();
+				if (e > s_mdMax) s_mdMax = e;
+				s_mdAdvB += (float)(mirrorBodyAdv < 0 ? -mirrorBodyAdv : mirrorBodyAdv);
+				s_mdAcc += dt;
+				if (s_mdAcc >= 1.0f)
+				{
+					DEBUG_STREAM << "[mirdiv] maxErr=" << s_mdMax
+						<< " bodyTravel/s=" << s_mdAdvB
+						<< " bodyTgtSpd=" << bodyTargetSpeed << "\n" << std::flush;
+					s_mdAcc = 0.0f; s_mdMax = 0.0f; s_mdAdvB = 0.0f; s_mdAdvL = 0.0f;
+				}
+			}
 			Quaternion angular_deviation;
 			angular_deviation.Subtract(
 				projectedOrigin.angularPosition,
@@ -3334,12 +4054,65 @@ void
 			{
 				Scalar posDb = (updatePositionDeadband > 0.0f)
 					? updatePositionDeadband : 0.04f;
+				// LINEAR "came-to-rest" trigger -- the symmetric analog of the
+				// angular (live yaw-rate==0 && replicated yaw-rate!=0) resync
+				// trigger in the type-4 gate below.  The position deadband alone
+				// does NOT catch a stop: once the master halts, its localOrigin is
+				// pinned and its OWN dead-reckon projection is re-based to it each
+				// frame, so error->0 and no pose record fires -- leaving the peer
+				// holding the last WALKING velocity (updateVelocity), which the
+				// replicant keeps dead-reckoning + animating as a phantom walk
+				// until the 2s heartbeat.  Fire a pose record the frame the live
+				// horizontal speed collapses while the last-SENT speed was still
+				// non-zero, so the replicant gets velocity=0 immediately.
+				const Scalar liveSpdSq =
+					(Scalar)(localVelocity.linearMotion.x * localVelocity.linearMotion.x
+					+ localVelocity.linearMotion.z * localVelocity.linearMotion.z);
+				const Scalar sentSpdSq =
+					(Scalar)(updateVelocity.linearMotion.x * updateVelocity.linearMotion.x
+					+ updateVelocity.linearMotion.z * updateVelocity.linearMotion.z);
+				const Logical cameToRest = (liveSpdSq < 0.01f && sentSpdSq > 0.01f);
+				// DENSE MOTION SEND (replicant-smoothness): the position deadband
+				// fires IRREGULARLY (only after ~0.55u of drift), but the replicant's
+				// dead-reckoner predicts the next record one PAST-interval ahead and
+				// lerps its localOrigin toward that fixed horizon target -- so when the
+				// deadband cadence != the predicted cadence, the peer decelerates
+				// toward a stale target then lurches when a record finally lands
+				// (measured: dead-reckoned ground speed surging 5<->27 while the master
+				// walks a steady 6.13).  Sending a pose record EVERY frame while moving
+				// makes the cadence regular + dense (records ~1 frame apart), so the
+				// horizon prediction matches and the lerp tracks smoothly.  On a LAN
+				// this is a handful of small packets/frame -- negligible.
+				// Dense while moving: with the gait-driven peer, the master's velocity
+				// mirror no longer models the peer, so the deadband under-sends and the
+				// peer diverges (measured 11u snaps).  Dense records keep the correction
+				// offset tiny; the peer absorbs it via the authentic pose-sync decay.
+				static const int s_denseTx = getenv("BT_NO_DENSE_TX") ? 0 : 1;
+				const Logical moving = (liveSpdSq > 0.25f);
 				if (
 					error.LengthSquared() > posDb
 					|| lastPerformance - lastUpdate > 2.0f
+					|| cameToRest
+					|| (s_denseTx && moving)
 				)
 				{
 					ForceUpdate();					// type 0: pose record
+					// RE-SEED the gait mirror to the just-sent pose: the peer will now
+					// extrapolate from THIS localOrigin, so the mirror must too.  (The
+					// type-0 writer only re-bases projectedOrigin in the sim-state-2
+					// transition, not the normal walk case, so do it here.)
+					if (s_gaitMirrorSend)
+					{
+						projectedOrigin.linearPosition  = localOrigin.linearPosition;
+						projectedOrigin.angularPosition = localOrigin.angularPosition;
+					}
+					if (getenv("BT_WIRE"))
+						DEBUG_STREAM << "[tx0] errSq=" << error.LengthSquared()
+							<< " posDb=" << posDb
+							<< " hb=" << (float)(lastPerformance - lastUpdate)
+							<< (cameToRest ? " REST" : "")
+							<< " lvLin=(" << localVelocity.linearMotion.x << ","
+							<< localVelocity.linearMotion.z << ")\n" << std::flush;
 				}
 			}
 			// ORIENTATION rides ONLY the type-4 resync record (the authentic
@@ -3353,20 +4126,74 @@ void
 			// UpdateTurnVelocityDiffrence.  [T1 expressions; zero-deadband
 			// guard falls back to the old quat-w stand-in]
 			{
+				// SCALAR PEER-YAW MIRROR (replaces the quaternion projectedOrigin mirror):
+				// the peer renders yaw ~= angMirrorYaw + angMirrorRate*(now - angMirrorTime)
+				// (re-based by the type-4 writer on every send, mech.cpp case 4).  The old
+				// quaternion mirror was ALSO recomputed each frame by the master's own
+				// reckoner from lastUpdate timing it does not control, so it drifted in
+				// slow pi-waves and FLOODED angle resyncs in bursts (measured maxAng~=pi)
+				// -- the walk+turn record churn.  Scalars: wrap-safe, self-timed, exact
+				// for the constant-rate spin the peer's exact integrator reproduces.
 				Scalar angDb = (updateTurnAngleDeadband    > 0.0f) ? updateTurnAngleDeadband    : -1.0f;
 				Scalar velDb = (updateTurnVelocityDeadband > 0.0f) ? updateTurnVelocityDeadband : -1.0f;
 				Logical resync = False;
+				int rzn = 0;	// 1=angleDrift 2=velDrift 4=cameToRestAng 8=mirrorInvalid
+				Scalar angDrift = 0.0f;
+				if (angMirrorValid)
+				{
+					YawPitchRoll _yprL;
+					_yprL = localOrigin.angularPosition;
+					const Scalar mirrorYaw = angMirrorYaw
+						+ angMirrorRate * (Scalar)(lastPerformance - angMirrorTime);
+					Scalar _dyaw = (Scalar)_yprL.yaw - mirrorYaw;
+					while (_dyaw >  3.14159265f) _dyaw -= 6.28318531f;
+					while (_dyaw < -3.14159265f) _dyaw += 6.28318531f;
+					angDrift = (_dyaw < 0.0f) ? -_dyaw : _dyaw;
+				}
+				else
+				{
+					resync = True; rzn |= 8;				// no baseline yet -> establish one
+				}
+				// Compare the live yaw rate against the LAST-SENT rate (updateVelocity,
+				// which the type-4 writer copies straight from localVelocity, mech.cpp:2107)
+				// -- NOT projectedVelocity, which the master's dead-reckoner recomputes in a
+				// different representation/sign so the scalar-.y compare always read the full
+				// 2x mismatch and FLOODED a resync every frame (measured: byVel=55/55,
+				// velDrift=2.618=2x the 1.309 spin rate).  The flood reset the peer's
+				// dead-reckon horizon every frame, pinning its slerp at ~half rate -> the
+				// "rotates slow then jumps" spin.  updateVelocity is the value the peer
+				// actually extrapolates with, in the same units, so a steady spin now drifts
+				// 0 (no resync) and the peer extrapolates smoothly; a real rate change still
+				// diverges past velDb and fires.
+				// NB: the Abs() macro (STYLE.H:118) is UNPARENTHESIZED --
+				// Abs(a-b) mis-expands to (a-b>0 ? a-b : -a-b) == -(a+b) on the false
+				// branch, NOT |a-b|.  For a steady spin (localVy==updVy) that yields
+				// -(2*rate): on a reverse spin it is +2*rate and FLOODED a resync every
+				// frame (the confirmed root of the half-rate/freeze).  Diff into a temp and
+				// take an explicit abs so the macro only ever sees a single token.
+				const Scalar velDiff  = (Scalar)localVelocity.angularMotion.y - (Scalar)updateVelocity.angularMotion.y;
+				const Scalar velDrift = (velDiff < 0.0f) ? -velDiff : velDiff;
+				// ANGULAR SIGN hunt (BT_ANGSIGN, 0.2s): instantaneous gate values, to
+				// catch which of local/update/projected angular-Y carries the wrong sign.
+				if (getenv("BT_ANGSIGN"))
+				{
+					static float s_as = 0.0f; s_as += dt;
+					if (s_as >= 0.2f)
+					{
+						s_as = 0.0f;
+						DEBUG_STREAM << "[angsign] localVy=" << (Scalar)localVelocity.angularMotion.y
+							<< " updVy=" << (Scalar)updateVelocity.angularMotion.y
+							<< " projVy=" << (Scalar)projectedVelocity.angularMotion.y
+							<< " velDrift=" << velDrift << " angDrift=" << angDrift
+							<< " turn=" << turn << "\n" << std::flush;
+					}
+				}
 				if (angDb > 0.0f)
 				{
-					if (Abs(localOrigin.angularPosition.y
-							- projectedOrigin.angularPosition.y) > angDb)
-						resync = True;
-					if (Abs((Scalar)localVelocity.angularMotion.y
-							- (Scalar)projectedVelocity.angularMotion.y) > velDb)
-						resync = True;
+					if (angDrift > angDb) { resync = True; rzn |= 1; }
+					if (velDrift > velDb) { resync = True; rzn |= 2; }
 					if ((Scalar)localVelocity.angularMotion.y == 0.0f
-						&& (Scalar)updateVelocity.angularMotion.y != 0.0f)
-						resync = True;
+						&& (Scalar)updateVelocity.angularMotion.y != 0.0f) { resync = True; rzn |= 4; }
 				}
 				else if (Abs(angular_deviation.w) < 0.997f)
 				{
@@ -3376,6 +4203,27 @@ void
 				{
 					ForceUpdate(1 << MechResyncUpdateModelBit);	// type 4
 				}
+				// SPIN diagnosis (BT_SPIN, once/sec): how DENSE are the orientation
+				// (type-4) records while turning?  A stuttery peer spin == too sparse.
+				if (getenv("BT_SPIN"))
+				{
+					static float sAcc = 0.0f; static int sResync = 0, sFrames = 0, sAng = 0, sVel = 0, sRest = 0;
+					static float sMaxAng = 0.0f, sMaxVel = 0.0f;
+					sAcc += dt; sFrames++; if (resync) sResync++;
+					if (rzn & 1) sAng++; if (rzn & 2) sVel++; if (rzn & 4) sRest++;
+					if (angDrift > sMaxAng) sMaxAng = angDrift;
+					if (velDrift > sMaxVel) sMaxVel = velDrift;
+					if (sAcc >= 1.0f)
+					{
+						DEBUG_STREAM << "[spin-tx] resyncs=" << sResync << "/" << sFrames
+							<< " byAngle=" << sAng << " byVel=" << sVel << " byRest=" << sRest
+							<< " maxAng=" << sMaxAng << "(db" << angDb << ")"
+							<< " maxVel=" << sMaxVel << "(db" << velDb << ")"
+							<< " liveYaw=" << (Scalar)localVelocity.angularMotion.y
+							<< " updYaw=" << (Scalar)updateVelocity.angularMotion.y << "\n" << std::flush;
+						sAcc = 0.0f; sResync = 0; sFrames = 0; sAng = 0; sVel = 0; sRest = 0; sMaxAng = 0.0f; sMaxVel = 0.0f;
+					}
+				}
 			}
 			// Commanded-speed deadband (binary @0x4aac88): the mapper's live
 			// speedDemand vs the last-replicated bodyTargetSpeed -> the tiny
@@ -3613,6 +4461,39 @@ void
 				}
 			}
 
+			// WORLD-STRUCTURE SWEEP PROBE (BT_WSWEEP, task #50 verification): once a
+			// second cast a horizontal fan of rays from the eyepoint against the
+			// STATIC collision solid tree (WorldStructurePick -> FindStaticSolidHitBy)
+			// and log the hit count + nearest range.  Confirms arena1's structures
+			// (garages/walls) ARE in the collision tree the boresight now queries --
+			// independent of the render sentinel or interactive aim.  Diag, off by default.
+			if (getenv("BT_WSWEEP"))
+			{
+				static float s_ws = 0.0f; s_ws += dt;
+				if (s_ws >= 1.0f)
+				{
+					s_ws = 0.0f;
+					Point3D eye = localOrigin.linearPosition; eye.y += 30.0f;
+					int hits = 0; float nearest = 1e30f; float ndir = -1.0f;
+					for (int a = 0; a < 24; ++a)
+					{
+						double th = (double)a * (6.2831853071795862 / 24.0);
+						Vector3D d((float)cos(th), 0.0f, (float)sin(th));
+						Point3D hp;
+						if (WorldStructurePick(eye, d, 2000.0f, &hp))
+						{
+							++hits;
+							float dx = hp.x-eye.x, dz = hp.z-eye.z;
+							float r = (float)Sqrt(dx*dx + dz*dz);
+							if (r < nearest) { nearest = r; ndir = (float)(th * 57.29578); }
+						}
+					}
+					DEBUG_STREAM << "[wsweep] eye=(" << eye.x << "," << eye.z
+						<< ") struct-hits=" << hits << "/24 nearest="
+						<< (hits ? nearest : -1.0f) << " dir=" << ndir << "deg\n" << std::flush;
+				}
+			}
+
 			float rs[3], rd[3];
 			if (!BTGetAimRay(gBTAimX, gBTAimY, rs, rd))
 			{
@@ -3644,16 +4525,62 @@ void
 						hotPoint  = hp;
 					}
 				}
-				if (hotTarget != 0)
+				// WORLD-STRUCTURE pick (task #50): ray-test the STATIC collision
+				// solid tree (garages/walls/props -- the geometry that already
+				// BLOCKS the mech's walk) along the boresight.  A structure CLOSER
+				// than the mech hit occludes it (the shot stops at the wall); with
+				// no mech, a structure hit IS the designation.  This is the
+				// authentic non-mech world pick: Mech::WorldStructurePick ->
+				// Mover::FindStaticSolidHitBy, the "test against the static world"
+				// half of the engine's own FindBoxedSolidHitBy (MOVER.cpp) -- so a
+				// shot lands on exactly the geometry the walk collides against
+				// (the user's "structures block the mech, but weapons pass through").
+				Point3D structPoint;
+				float   structDist = 1e30f;
+				bool    haveStruct = false;
+				if (gBTTerrainEntity != 0)
 				{
-					pickTarget = hotTarget;
+					Point3D sp;
+					if (WorldStructurePick(rayStart, rayDir, 1200.0f, &sp))
+					{
+						float dx = sp.x-rs[0], dy = sp.y-rs[1], dz = sp.z-rs[2];
+						structDist  = dx*dx + dy*dy + dz*dz;
+						structPoint = sp;
+						haveStruct  = true;
+						static float s_wp = 0.0f; s_wp += dt;
+						if (getenv("BT_GROUND_LOG") && s_wp >= 1.0f)
+						{
+							s_wp = 0.0f;
+							DEBUG_STREAM << "[wpick] structure hit at ("
+								<< sp.x << "," << sp.y << "," << sp.z << ") dist="
+								<< (float)Sqrt(structDist)
+								<< (hotTarget ? "  (mech also under boresight)" : "")
+								<< "\n" << std::flush;
+						}
+					}
+				}
+
+				if (hotTarget != 0 && (!haveStruct || bestDist <= structDist))
+				{
+					pickTarget = hotTarget;			// mech is the closest hit
 					pickPoint  = hotPoint;
 					++gAimHits;
 				}
+				else if (haveStruct)
+				{
+					// a world structure is the closest hit (garage/wall) -- or it
+					// occludes a mech behind it.  Designate it as the non-mech world
+					// pick (the geometry rides in the POINT; the sentinel entity has
+					// no damage-zone table -> no lock ring, HudSim part_013.c:5620).
+					pickTarget = gBTTerrainEntity;
+					pickPoint  = structPoint;
+					++gAimGround;
+				}
 				else
 				{
-					// the ground downrange of the guns (max = the pod's HUD
-					// range scale; past it the shot is a sky shot -> no target)
+					// no mech, no structure -> the flat ground downrange of the
+					// guns (max = the pod's HUD range scale; past it the shot is a
+					// sky shot -> no target)
 					extern bool BTGroundRayHit(float,float,float, float,float,float,
 						float, float*,float*,float*);
 					float hx, hy, hz;
@@ -3685,13 +4612,69 @@ void
 				MECH_TARGET_SUBIDX(this) = -1;
 				MECH_TARGET_POS(this)    = pickPoint;	// beam endpoint = the pick
 			}
+			else if (gBTTerrainEntity != 0)
+			{
+				// FIRE-AT-NOTHING (authentic, decomp part_013.c:7727): the pod fired
+				// freely at empty space -- the discharge gate is 0x388!=0 (the boresight
+				// always DESIGNATES a point, not a manual mech lock).  When nothing pickable
+				// is hit (a level shot flies over the flat ground, or open sky), designate a
+				// MAX-RANGE point using the world sentinel so the weapon discharges to max
+				// range.  Sentinel has no damage-zone table -> no aimed-zone damage, no lock
+				// ring (mechs only), per HudSimulation part_013.c:5620.
+				MECH_TARGET_ENTITY(this) = gBTTerrainEntity;
+				MECH_TARGET_SUBIDX(this) = -1;
+				Point3D farPt;
+				farPt.x = rs[0] + rd[0] * 1200.0f;	// 1200 = HUD range default (0x44960000)
+				farPt.y = rs[1] + rd[1] * 1200.0f;
+				farPt.z = rs[2] + rd[2] * 1200.0f;
+				MECH_TARGET_POS(this) = farPt;
+				targetReticle.targetEntity    = gBTTerrainEntity;
+				targetReticle.rayIntersection = farPt;
+			}
 			else
 			{
-				MECH_TARGET_ENTITY(this) = 0;			// sky: no target, no discharge
+				MECH_TARGET_ENTITY(this) = 0;			// no world sentinel -> no target
 				MECH_TARGET_SUBIDX(this) = -1;
 			}
 		}
 
+		// DETERMINISTIC FIRE-AT-STRUCTURE TEST (BT_FIRE_AT_STRUCT, task #50 verify):
+		// the headless aim ray (BTGetAimRay) is flaky without a focused window, so
+		// this bypasses it -- designate the NEAREST world structure (360 sweep) as
+		// the target every frame so BT_AUTOFIRE can be tested against a real, stable,
+		// in-range building.  Diag only, off by default.
+		if (getenv("BT_FIRE_AT_STRUCT"))
+		{
+			extern Entity *gBTTerrainEntity;
+			Point3D eye = localOrigin.linearPosition; eye.y += 30.0f;
+			Point3D best; float bestR = 1e30f; bool got = false;
+			for (int a = 0; a < 24; ++a)
+			{
+				double th = (double)a * (6.2831853071795862 / 24.0);
+				Vector3D d((float)cos(th), 0.0f, (float)sin(th));
+				Point3D hp;
+				if (WorldStructurePick(eye, d, 2000.0f, &hp))
+				{
+					float dx = hp.x-eye.x, dz = hp.z-eye.z;
+					float r = (float)Sqrt(dx*dx + dz*dz);
+					if (r < bestR) { bestR = r; best = hp; got = true; }
+				}
+			}
+			if (got && gBTTerrainEntity != 0)
+			{
+				MECH_TARGET_ENTITY(this) = gBTTerrainEntity;
+				MECH_TARGET_SUBIDX(this) = -1;
+				MECH_TARGET_POS(this)    = best;
+				static float s_fas = 0.0f; s_fas += dt;
+				if (getenv("BT_FIRE_LOG") && s_fas >= 1.0f)
+				{
+					s_fas = 0.0f;
+					DEBUG_STREAM << "[fireat] nearest struct (" << best.x << ","
+						<< best.y << "," << best.z << ") r=" << bestR << "\n" << std::flush;
+				}
+			}
+		}
+
 		// HUD feeds: the range caret + the hotbox (world point + state) + the
 		// recovered-Execute instruments (compass, twist tape, group mask).
 		// The range caret tracks the PICK (authentic: :5639 computes it from
@@ -3842,7 +4825,18 @@ void
 			static int s_prevBtn[4] = {0, 0, 0, 0};
 			static int s_afPhase = 0;
 			s_afPhase ^= 1;
-			const int autofire = (gBTDrive.fireForced && targetInArc) ? s_afPhase : 0;
+			// DIAG (BT_AF_PERIOD=<sec>): throttle autofire cadence -- pulse the trigger
+			// only briefly every <sec> seconds, to test a slower-than-max fire rate (the
+			// coolant/jam mechanic is fire-rate dependent: at max spam the weapon overheats
+			// regardless; at a realistic cadence coolant priority decides the jam).
+			static float s_afClock = 0.0f;
+			s_afClock += dt;
+			static const float s_afPeriod =
+				getenv("BT_AF_PERIOD") ? (float)atof(getenv("BT_AF_PERIOD")) : 0.0f;
+			int afGate = 1;
+			if (s_afPeriod > 0.0f)
+				afGate = (fmodf(s_afClock, s_afPeriod) < 0.6f) ? 1 : 0;
+			const int autofire = (gBTDrive.fireForced && targetInArc && afGate) ? s_afPhase : 0;
 			const int buttons[4] = {
 				LBE4ControlsManager::ButtonJoystickTrigger,		// 0x40
 				LBE4ControlsManager::ButtonJoystickPinky,		// 0x45
@@ -4112,7 +5106,8 @@ void
 				DEBUG_STREAM << "[target] aim=(" << gBTAimX << "," << gBTAimY << ")"
 					<< (victim != 0 ? "  MECH under boresight (aimed)"
 						: (pickTarget != 0 ? "  terrain downrange (beam at scenery)"
-										   : "  sky (no target, no discharge)"))
+						: (MECH_TARGET_ENTITY(this) != 0 ? "  fire-at-nothing (max-range designate)"
+										   : "  no target (no world sentinel)")))
 					<< "  range=" << range
 					<< (anyWeaponInRange ? "  IN WEAPON RANGE" : "")
 					<< "  [mechPicks=" << gAimHits << " groundPicks=" << gAimGround
@@ -4301,13 +5296,54 @@ void
 	//
 	if (GetInstance() == MasterInstance)
 	{
+		// (task #66) INSTABILITY MODEL -- byte-decoded from the binary master
+		// perf @0x4aad3d-0x4aaf14 [T1] (the un-exported gap; capstone disasm).
+		// Runs HERE, right before the gyro dispatch, exactly as the binary
+		// does: it reads LAST frame's acceleration snapshot (the tail updates
+		// localAcceleration afterwards -- "AccelerationLastFrame", the same
+		// vector the binary copies to +0x82c after this point).
+		{
+			// term 1: acceleration sway, squared
+			Scalar a = localAcceleration.linearMotion.Length();
+			a = (maxUnstableAcceleration > 0.0f) ? a / maxUnstableAcceleration : 0.0f;
+			if (a > 1.0f) a = 1.0f;
+			a *= unstableAccelerationEffect;
+			unstablePercentage = a * a;
+			// term 2: "gun the engine" -- commanded speed the legs haven't
+			// reached, as a fraction of the command (negative when coasting
+			// past the demand -- the binary does not floor it)
+			MechControlsMapper *im = MappingMapper();
+			Scalar u = (im != 0) ? im->speedDemand : 0.0f;
+			if (u > reverseSpeedMax2)  u = reverseSpeedMax2;	// @0x7a0 run cap
+			if (u < gimpStrideLength)  u = gimpStrideLength;	// @0x350 (negative reverse cap)
+			Scalar r = 0.0f;
+			if (u > 0.0f)
+				r = (u - legCycleSpeed) / u;
+			else if (u < 0.0f)
+			{
+				r = u - legCycleSpeed;
+				r = ((r <= 0.0f) ? -r : r) / (-u);
+			}
+			if (r > 1.0f) r = 1.0f;
+			unstablePercentage += r * unstableGunTheEngineEffect;
+			// term 3: turning in place (trn, leg state 4)
+			if (legAnimationState == 4)
+				unstablePercentage += unstableStopedTurnEffect;
+			if (unstablePercentage > 1.0f) unstablePercentage = 1.0f;
+			if (getenv("BT_GYRO_TRACE")) { static long s_it=0; if ((++s_it % 120)==0)
+				DEBUG_STREAM << "[instab] " << unstablePercentage
+					<< " (|a|=" << localAcceleration.linearMotion.Length()
+					<< " demand=" << u << " cyc=" << legCycleSpeed
+					<< " legState=" << legAnimationState << ")\n" << std::flush; }
+		}
+
 		extern void GyroFrameJointWrite(Subsystem *, Scalar, int, int);
 		static int s_gyrodbg = 0;
 		if (getenv("BT_GYRO_LOG") && s_gyrodbg++ == 0)
 			DEBUG_STREAM << "[gyro] dispatch: gyro=" << (void *)gyroSubsystem
 				<< " legAnim=" << legAnimationState
 				<< " death=" << deathAnimationLatched << "\n" << std::flush;
-		GyroFrameJointWrite(gyroSubsystem, 0.0f /* mech+0x3F0 model TBD */,
+		GyroFrameJointWrite(gyroSubsystem, unstablePercentage,
 							legAnimationState, deathAnimationLatched);
 	}
 	else if (getenv("BT_GYRO_LOG"))
@@ -4319,8 +5355,112 @@ void
 	}
 
 	// Keep the simulation/networking bookkeeping consistent (this is exactly
-	// what the base "no time / stasis" early-out does).
-	WriteSimulationUpdate(update_stream);
+	// what the base "no time / stasis" early-out does).  MASTER ONLY (2026-07-14):
+	// replication is master-authoritative -- a replicant must never serialize.
+	// The port's replicant runs the leg SM for JOINTS (task #50 accommodation),
+	// whose transitions call ForceUpdate() and mark updateModel; serializing those
+	// emitted derived/uninitialized state back into the stream (and the type-3
+	// writer re-dispatches SetBodyAnimation on the WRITER -- the real-clock crash
+	// rode this path with legAnimationState still 0xCDCDCDCD).  Discard replicant
+	// marks instead.
+	// WATCHER POLL (engine Simulation::PerformAndWatch tail, SIMULATE.cpp:460):
+	// the engine path ends Perform() -> ExecuteWatchers() -> WriteSimulationUpdate().
+	// This reconstruction replaced the whole performance but DROPPED the
+	// ExecuteWatchers() step, so the entity-level POLLED audio watchers
+	// (AudioLogicalTrigger FootStep, AudioMotionScale/Trigger LocalVelocity, ...)
+	// never executed -- only the PUSHED StateIndicator watchers fired.  That's
+	// why footsteps/motion-scaled sounds were silent while state sounds worked.  [T0]
+	// (AUDIO_FIDELITY F5) footStep is the authored CONTACT LEVEL (binary
+	// disasm @0x4a9e80-0x4a9eb6): while the leg channel's gait state is not
+	// Standing(0)/1, footStep = (jointlocal.y <= *clip threshold); states
+	// 0/1 RETAIN the previous value.  The FootStep matcher fires on the
+	// CHANGE to 1 -- one clean rising edge per actual foot plant, timed by
+	// the clip's authored root-height crossing (replaces the 150 ms
+	// transition pulse, which fired at clip boundaries with a fixed width).
+	if (legAnimationState != 0 && legAnimationState != 1)
+	{
+		if (!footStepRootResolved)
+		{
+			footStepRootResolved = 1;
+			footStepRootJoint    = ResolveJoint("jointlocal");
+		}
+		Scalar *fs_thresh = legAnimation.footStepThreshold;
+		if (footStepRootJoint != 0 && fs_thresh != 0)
+		{
+			int contact =
+				(footStepRootJoint->GetTranslation().y <= *fs_thresh) ? 1 : 0;
+			if (getenv("BT_AUDIO_LOG")) { static int s_fc=0;
+				if (contact != footStep && s_fc++ < 40)
+					DEBUG_STREAM << "[audio] footstep contact " << footStep << "->" << contact
+						<< " rootY=" << footStepRootJoint->GetTranslation().y
+						<< " thresh=" << *fs_thresh << " legState=" << legAnimationState
+						<< "\n" << std::flush; }
+			footStep = contact;
+		}
+	}
+
+	// (AUDIO_FIDELITY F19) the localAcceleration feed, EXACTLY the binary's
+	// structure: 15-sample RING BUFFERS of the raw per-frame position
+	// derivative + dt (ctor part_012.c:9836-9840, fill 0); accel = the
+	// frame-to-frame derivative of the ring MEAN over the mean dt
+	// (part_012.c:15169-15195).  Runs HERE, right before the watcher poll,
+	// so the accel attribute updates EVERY polled frame -- the ring mean's
+	// rotation jitter keeps the change-gate open and the authored N=30
+	// footstep smoother fed (fed per-stride only, it took 10-20 s to warm
+	// from fill=0: the late-footsteps bug).
+	{
+		Scalar rdx = localOrigin.linearPosition.x - accelPrevPos.x;
+		Scalar rdy = localOrigin.linearPosition.y - accelPrevPos.y;
+		Scalar rdz = localOrigin.linearPosition.z - accelPrevPos.z;
+		accelPrevPos = localOrigin.linearPosition;
+		if (dt > 1.0e-4f)
+		{
+			velRingFwd[velRingCursor]  = (Scalar)sqrtf(rdx * rdx + rdz * rdz) / dt;
+			velRingVert[velRingCursor] = rdy / dt;
+			velRingDt[velRingCursor]   = dt;
+			velRingCursor = (velRingCursor + 1) % 15;
+		}
+		Scalar fwdMean = 0.0f, vertMean = 0.0f, dtMean = 0.0f;
+		for (int vr = 0; vr < 15; ++vr)
+		{
+			fwdMean  += velRingFwd[vr];
+			vertMean += velRingVert[vr];
+			dtMean   += velRingDt[vr];
+		}
+		fwdMean  *= (1.0f / 15.0f);
+		vertMean *= (1.0f / 15.0f);
+		dtMean   *= (1.0f / 15.0f);
+		if (dtMean > 1.0e-4f)						// binary: _DAT_004ab9d4 guard
+			localAcceleration.linearMotion = Vector3D(
+				0.0f,
+				(vertMean - accelPrevVertMean) / dtMean,
+				-((fwdMean - accelPrevFwdMean) / dtMean));
+		accelPrevFwdMean  = fwdMean;
+		accelPrevVertMean = vertMean;
+	}
+
+	// (AUDIO_FIDELITY F7) latch the incoming-missile report accumulated by
+	// Missile::MoveAndCollide since our last frame, then re-arm.  The authored
+	// beeper matches incomingLock 1/0 and the tempo scale reads the range --
+	// both polled by ExecuteWatchers below.
+	incomingLock          = incomingLockNext;
+	distanceToMissile     = distanceToMissileNext;
+	incomingLockNext      = 0;
+	distanceToMissileNext = FLT_MAX;
+
+	if (getenv("BT_AUDIO_LOG")) { static int s_wd=0; if ((s_wd++ % 300)==0)
+		DEBUG_STREAM << "[audio] mech watcher poll t=" << (GetTickCount() % 1000000)
+			<< " n=" << s_wd
+			<< " delayed=" << (int)AreWatchersDelayed() << " audioWatchers=" << DebugAudioWatcherCount()
+			<< " simFlags=0x" << std::hex << (unsigned)simulationFlags << std::dec
+			<< "\n" << std::flush; }
+	if (!AreWatchersDelayed())
+		ExecuteWatchers();
+
+	if (GetInstance() != ReplicantInstance)
+		WriteSimulationUpdate(update_stream);
+	else
+		updateModel = 0;						// drop accommodation-path marks
 }
 
 
@@ -4433,7 +5573,9 @@ void
 	const int  freshBlock = isPlayer ? (gBlockCooldown <= 0.0f ? 1 : 0) : 1;
 	if (isPlayer && gBlockCooldown > 0.0f)
 		gBlockCooldown -= dt;							// decay the out-of-contact window
-	// BINARY-TAIL-DEFERRED: collisionTemporaryState = 0 here (@4aa741).
+	// Per-frame collision-state reset (@4aa741): the walk below re-accumulates it
+	// per resolved contact, then it's pushed into the collisionState StateIndicator.
+	collisionTemporaryState = 0;
 	// COLLISION-DAMAGE ECONOMY GUARD: snapshot the TRUE frame motion for the
 	// per-contact velocity restore in Mech::ProcessCollision (see mech.hpp) --
 	// the list walk below reflects worldLinearVelocity at every StaticBounce,
@@ -4452,6 +5594,12 @@ void
 	if (cols != 0)
 		ProcessCollisionList(cols, dt, old_position, &dmg);
 
+	// Push the frame's accumulated contact state into the audio-bound
+	// collisionState indicator: 0->1 on a fresh contact fires the impact sound,
+	// 1->0 when contact breaks; SetState only fires on change so a pressed-against
+	// contact plays once, not every frame.  (@4aa741 sibling of the reset above.)
+	collisionState.SetState((unsigned)collisionTemporaryState);
+
 	// 6. response policy (@4aa76c-4aab5f)
 	if (dmg.damageAmount == 0.00123f)					// crushable icon: move STANDS
 	{
@@ -4793,9 +5941,21 @@ void
 			damage->damageAmount = 0.00123f;	// walk-through sentinel 0x3aa137f4 (:15402-15404)
 	}
 
-	// BINARY-TAIL-DEFERRED: collisionTemporaryState tail (:15406-15413) --
-	// implement together with the per-frame zero (@4aa741) and the named
-	// StateIndicator members.
+	// Contact-state accumulator tail (decomp part_012.c:15406-15413).  The
+	// authentic split is InitialHit(1) vs Slide(2), keyed on the two collision
+	// floats @0x240/0x244 -- both are still fieldAt() stubs (return 0), so the
+	// Slide branch can't be computed faithfully yet.  A resolved contact IS an
+	// impact, so accumulate InitialHit(1) -- the decomp's dominant `else` branch;
+	// upgrade to the full 1-vs-2 split once 0x240/0x244 are reconstructed.  [T3]
+	if (collisionTemporaryState == 0)
+	{
+		collisionTemporaryState = 1;
+		// (AUDIO_FIDELITY F17) capture the impact speed for the authored
+		// CollisionSpeed volume/brightness scales ([0,25] -> harder hits
+		// sound louder + brighter).  |worldLinearVelocity| at the arming
+		// contact = the impact speed.
+		collisionSpeed = worldLinearVelocity.Length();
+	}
 }
 
 
@@ -4994,3 +6154,107 @@ void
 				<< ") rgb=(" << r << "," << g << "," << b << ")" << std::endl;
 	}
 }
+
+//###########################################################################
+//					BTReportIncomingMissile -- complete-type bridge (F7)
+//
+//	Missile::MoveAndCollide (missile.cpp, forward-declared Mech only) reports
+//	its target + range each tick; the missile-alarm attributes latch in
+//	Mech::PerformAndWatch.  Seeker targets are always mechs in this game
+//	(the launcher's lock); null-guarded.
+//###########################################################################
+void BTReportIncomingMissile(Entity *target, Scalar range)
+{
+	if (target != 0)
+	{
+		((Mech *)target)->ReportIncomingMissile(range);
+	}
+}
+
+//###########################################################################
+//					Rear-fire / look-view bridges (task #68)
+//
+//	The binary's controls mapper (part_013.c:396-459) runs a five-state LOOK
+//	machine off the pod's look buttons: on a state change it re-aims the
+//	eyepoint (mech+0x360 = EyepointRotation, consumed by DPLEyeRenderable)
+//	and re-arms each weapon's view-fire enable (+0x3E0): FORWARD view enables
+//	the non-rear weapons, LOOK-BACK enables the REAR-mounted ones (+0x334,
+//	set from the mount segment's 'b' marker -- sitelbgunport/siterbgunport),
+//	side/down views disable all fire.  Complete-Mech/Weapon TU bridges; the
+//	mapper calls BTCommitLookState on each state change.
+//###########################################################################
+int BTWeaponMountIsRear(void *ownerMech, int segIndex)
+{
+	Mech *m = (Mech *)ownerMech;
+	if (m == 0)
+		return 0;
+	EntitySegment *seg = m->GetSegment(segIndex);
+	if (seg == 0)
+		return 0;
+	const char *segname = seg->GetName();		// CString -> const char*
+	if (segname == 0)
+		return 0;
+	// the binary marker @0x511aa2 is the single character "b" (the back
+	// gun-port site names are the only port names containing it)
+	int rear = (strstr(segname, "b") != 0) ? 1 : 0;
+	if (getenv("BT_PROJ_LOG")) { static int s_rn=0; if (s_rn++<40)
+		DEBUG_STREAM << "[rearfire] segIndex=" << segIndex << " name='"
+			<< segname << "' rear=" << rear << "\n" << std::flush; }
+	return rear;
+}
+
+void BTCommitLookState(void *mech_v, int look_state)
+{
+	Mech *m = (Mech *)mech_v;
+	if (m == 0)
+		return;
+
+	// eyepoint per state (binary case switch: yaw = the authored side angles,
+	// look-back = yaw pi (0x40490fdb) + lookBackAngle pitch, look-down =
+	// lookFrontAngle pitch)
+	Scalar pitch = 0.0f, yaw = 0.0f;
+	switch (look_state)
+	{
+	case 1: /*LookLeft*/	yaw   = m->lookLeftAngle;	break;
+	case 2: /*LookRight*/	yaw   = m->lookRightAngle;	break;
+	case 3: /*LookBehind*/	yaw   = PI;					// binary 0x40490fdb
+							pitch = m->lookBackAngle;	break;
+	case 4: /*LookDown*/	pitch = m->lookFrontAngle;	break;
+	default: break;			// LookNone: identity
+	}
+	m->eyepointRotation = EulerAngles(
+		Radian(Radian::Normalize(pitch)),
+		Radian(Radian::Normalize(yaw)),
+		Radian(0.0f));
+
+	// weapon view-fire enables (binary: fwd = !rear, back = rear, else 0)
+	{
+		extern int  BTWeaponIsRearFiring(Subsystem *sub);	// -1 = not a weapon
+		extern void BTWeaponSetViewFireEnable(Subsystem *sub, int enable);
+		for (int id = 2; id < m->GetSubsystemCount(); ++id)
+		{
+			Subsystem *sub = m->GetSubsystem(id);
+			int rf = BTWeaponIsRearFiring(sub);
+			if (rf < 0)
+				continue;
+			BTWeaponSetViewFireEnable(sub,
+				(look_state == 0) ? (rf == 0) :
+				(look_state == 3) ? rf : 0);
+		}
+	}
+
+	// (task #68) the HUD pip GROUP mask (binary mech+0x390, weapon update
+	// part_013.c:5588-5595): forward view shows the FRONT pip group (|=1,&~2),
+	// look-back shows the REAR group (|=2,&~1); side/down views leave it.
+	// mech4's HUD tick publishes the low bits as gBTHudGroupMask each frame.
+	if (look_state == 0)
+		m->targetReticle.reticleElementMask = (Reticle::ReticleElements)
+			(((int)m->targetReticle.reticleElementMask | 1) & ~2);
+	else if (look_state == 3)
+		m->targetReticle.reticleElementMask = (Reticle::ReticleElements)
+			(((int)m->targetReticle.reticleElementMask | 2) & ~1);
+	if (getenv("BT_KEY_LOG"))
+		DEBUG_STREAM << "[look] state=" << look_state
+			<< " rearFiring=" << m->rearFiring
+			<< " yaw=" << yaw << " pitch=" << pitch << "\n" << std::flush;
+}
diff --git a/game/reconstructed/mechmppr.cpp b/game/reconstructed/mechmppr.cpp
index e6cb76e..3e6442f 100644
--- a/game/reconstructed/mechmppr.cpp
+++ b/game/reconstructed/mechmppr.cpp
@@ -681,6 +681,31 @@ void
 							key_throttle = 0.08f;			// near-idle half-cycle
 					}
 				}
+				// BT_FORCE_SWEEP=<period>: triangle-sweep the forced throttle 0.2..0.9
+				// continuously -- mimics a keyboard key-hold sweeping the lever every
+				// frame (a type-2 speed record per frame), the keyboard-skip repro.
+				{
+					static float s_swpP = -1.0f, s_swpClock = 0.0f;
+					if (s_swpP < 0.0f)
+					{
+						const char *fw = getenv("BT_FORCE_SWEEP");
+						s_swpP = fw ? (float)atof(fw) : 0.0f;
+					}
+					if (s_swpP > 0.0f)
+					{
+						s_swpClock += time_slice;
+						float ph  = fmodf(s_swpClock, 2.0f * s_swpP) / s_swpP;	// 0..2
+						float tri = (ph < 1.0f) ? ph : (2.0f - ph);				// 0..1..0
+						key_throttle = 0.2f + 0.7f * tri;
+						// BT_FORCE_STEP=1: quantize the swept throttle to the RIO
+						// Ranger 0.05 grid (the authentic ADC/deadband step) -- the
+						// stepped-vs-continuous A/B for the speed-change glitch.
+						static int s_swpStep = -1;
+						if (s_swpStep < 0) s_swpStep = getenv("BT_FORCE_STEP") ? 1 : 0;
+						if (s_swpStep)
+							key_throttle = floorf(key_throttle / 0.05f + 0.5f) * 0.05f;
+					}
+				}
 				// BT_FORCE_FLIP=<t>: invert the forced throttle after t sim-seconds
 				// (the mid-stride direction-change repro).
 				static float s_hFlip = -1.0f;
@@ -706,6 +731,14 @@ void
 			{
 				throttlePosition = (key_throttle >= 0.0f) ? key_throttle : -key_throttle;
 				reverseThrust    = (key_throttle < 0.0f) ? 1 : 0;
+				// (task #68) look-behind: hold 'V' = the pod's rear-view button.
+				// (The other look buttons stay unbound on the keyboard rig.)
+				// Gated with the throttle writes -- a live RIO device (PadRIO)
+				// feeds lookBehind through its own mapped rear-view button.
+				{
+					extern int gBTLookBehind;
+					lookBehind = gBTLookBehind;
+				}
 			}
 			// CONTROL-MODE AXIS ROUTING (2026-07-13, the pod mapping): in
 			// BASIC the stick steers the legs (turn) and the torso auto-
@@ -915,14 +948,16 @@ void
 
 	if (lookState != previousLookState)
 	{
-		// TODO(look-eyepoint): the commit block below writes the eyepoint pose at
-		// binary offsets whose Mech-member mapping is CONFLICTED (mech+0x360 is
-		// claimed by mechName, +0x410 by stateFlags, +0x7bc by weaponRoster --
-		// and the old draft even routed them through the TORSO pointer).  Arbitrate
-		// those labels against the raw before enabling; the port has no eyepoint
-		// consumer yet.  Look-state SELECTION above stays live (this-only).
-		DEBUG_STREAM << "[mppr] look state -> " << lookState
-			<< " (eyepoint commit deferred)\n" << std::flush;
+		// (task #68) the look commit is LIVE: the conflicted labels are
+		// arbitrated (mech+0x360 = EyepointRotation -- the eye renderable
+		// consumes it; +0x410 = RearFiring; the +0x7bc children = the WEAPON
+		// roster, not cameras).  BTCommitLookState (mech4.cpp complete-type
+		// TU) re-aims the eyepoint and re-arms each weapon's viewFireEnable:
+		// forward view = the non-rear weapons, LOOK-BACK = the rear-mounted
+		// ones, side/down = none.
+		extern void BTCommitLookState(void *mech, int look_state);
+		BTCommitLookState((void *)mech, (int)lookState);
+		DEBUG_STREAM << "[mppr] look state -> " << lookState << "\n" << std::flush;
 	}
 	else if (0)		// DEFERRED body (kept for the reconstruction record)
 	{
diff --git a/game/reconstructed/mechrecon.hpp b/game/reconstructed/mechrecon.hpp
index 26f4d06..a67b112 100644
--- a/game/reconstructed/mechrecon.hpp
+++ b/game/reconstructed/mechrecon.hpp
@@ -270,6 +270,11 @@ struct SequenceController
 	// --- clip data parsed by SelectSequence (keyframe accessors read by mech3) ---
 	int			keyframeCount;		// frameCount             (binary +0x14)
 	int			jointCount;			// animated joints        (binary +0x18)
+	// (AUDIO_FIDELITY F5) the ANI header's footstep CONTACT threshold -- the
+	// clip-authored root height below which the foot is planted.  The engine's
+	// own AnimationInstance captures the same word (JMOVER.cpp:1415); the
+	// binary's per-frame perf compares jointlocal.y against it (+0x20).
+	Scalar		*footStepThreshold;	// &hdr[2]                 (binary +0x20)
 	int			*jointIndices;		// keyframe->skeleton map  (binary +0x1c)
 	Scalar		*keyframeTimes;		// frameTimes[frameCount]  (binary +0x24)
 	void		*keyframeBase;		// keyframe pose data base (binary +0x28)
@@ -286,10 +291,10 @@ struct SequenceController
 	unsigned	cbArg2, cbArg3;		// finished-callback context words (binary +0x4c/0x50)
 
 	SequenceController()
-		: keyframeCount(0), jointCount(0), jointIndices(0), keyframeTimes(0),
-		  keyframeBase(0), keyframeCursor(0), keyframeData(0), currentFrame(0),
-		  currentTime(0.0f), jointSubsystem(0), owner(0), clipResource(0),
-		  cbCode(0), cbArg2(0), cbArg3(0) {}
+		: keyframeCount(0), jointCount(0), footStepThreshold(0), jointIndices(0),
+		  keyframeTimes(0), keyframeBase(0), keyframeCursor(0), keyframeData(0),
+		  currentFrame(0), currentTime(0.0f), jointSubsystem(0), owner(0),
+		  clipResource(0), cbCode(0), cbArg2(0), cbArg3(0) {}
 
 	void	Init(Mech *owner_mech);								// @00427768 (ctor logic)
 	void	SelectSequence(int clip_id, void *cb, unsigned a2, unsigned a3);	// @004277a8
@@ -435,11 +440,33 @@ namespace Vector
 //
 // P3 GAIT CUTOVER: backed by the real engine Quaternion (were no-op stubs).
 //   ReconQuatIdentity(q, &id)      -> q = Quaternion::Identity
-//   ReconQuatIntegrate(out,in,d)   -> out = in integrated by angular delta d
-//                                     (engine Quaternion::Add(source, Vector3D) == FUN_00409f58)
+//   ReconQuatIntegrate(out,in,d)   -> out = in composed with an EXACT rotation by
+//                                     angular delta d (= the real FUN_00409f58).
 // All callers pass (Quaternion*,Quaternion*) / (Quaternion*,Quaternion*,Vector3D*).
 inline void	ReconQuatIdentity(Quaternion *q, const Quaternion * /*id*/)	{ *q = Quaternion::Identity; }
-inline void	ReconQuatIntegrate(Quaternion *out, const Quaternion *in, const Vector3D *delta)	{ out->Add(*in, *delta); }
+// EXACT axis-angle quaternion integration -- the real FUN_00409f58 (part_000.c:9359),
+// verified from the decomp.  A prior stand-in wrongly used `out->Add(*in,*delta)` (a
+// small-angle VECTOR add): correct every-frame on the master (tiny angle) but it
+// DIVERGES over a long dead-reckon gap -- the spinning-peer heading drifting to ~180deg
+// then snapping.  The binary builds the unit rotation quaternion from the rotation vector
+// `delta` (angle=|delta|, axis=delta/angle) as { axis*sin(angle/2), cos(angle/2) } and
+// Hamilton-multiplies it onto `in` (FUN_00409d9c: out = in (X) deltaQuat).
+inline void	ReconQuatIntegrate(Quaternion *out, const Quaternion *in, const Vector3D *delta)
+{
+	const Scalar ang = delta->Length();
+	if (ang > 1.0e-6f)
+	{
+		const Scalar half = (Scalar)(fmodf((float)ang, 6.2831853f) * 0.5f);	// reduce2pi, then halve
+		const Scalar s    = (Scalar)(sinf((float)half) / ang);				// sin(angle/2)/angle
+		const Quaternion dq((Scalar)(delta->x * s), (Scalar)(delta->y * s),
+							(Scalar)(delta->z * s), (Scalar)cosf((float)half));
+		out->Multiply(*in, dq);												// in (X) dq
+	}
+	else
+	{
+		*out = *in;
+	}
+}
 template<class...A> inline Recon	ReconQuatSlerp(A&&...)		{ return Recon(); }
 template<class...A> inline Recon	ComputeImpactDamage(A&&...)	{ return Recon(); }
 
diff --git a/game/reconstructed/mechsub.cpp b/game/reconstructed/mechsub.cpp
index cbb452d..0328282 100644
--- a/game/reconstructed/mechsub.cpp
+++ b/game/reconstructed/mechsub.cpp
@@ -89,11 +89,29 @@ static const StatusNameEntry StatusNameTable[] =
 //#############################################################################
 // Shared Data Support
 //
+// ConfigureActivePress -> the +0x110 session flag (AUDIO_FIDELITY.md F15).
+const MechSubsystem::IndexEntry
+	MechSubsystem::AttributePointers[]=
+{
+	ATTRIBUTE_ENTRY(MechSubsystem, ConfigureActivePress, configureActivePress)	// id 2 @0x110
+};
+
+MechSubsystem::AttributeIndexSet&
+	MechSubsystem::GetAttributeIndex()
+{
+	static MechSubsystem::AttributeIndexSet attributeIndex(
+		ELEMENTS(MechSubsystem::AttributePointers),
+		MechSubsystem::AttributePointers,
+		Simulation::GetAttributeIndex()
+	);
+	return attributeIndex;
+}
+
 MechSubsystem::SharedData
 	MechSubsystem::DefaultData(
 		&MechSubsystem::ClassDerivations,
 		ReconMessageHandlers,
-		ReconAttributeIndex,
+		MechSubsystem::GetAttributeIndex(),
 		MechSubsystem::StateCount
 	);
 
@@ -132,7 +150,7 @@ MechSubsystem::MechSubsystem(
 	criticalReference			= 0;			// this[0x42]
 	collisionCriticalHitWeight	= 0;			// this[0x43]
 	printSimulationState		= 0;			// this[0x41]
-	vitalSubsystemIndex			= -1;			// this[0x44]
+	configureActivePress		= -1;			// this[0x44] configure-session idle
 	damageZone		= (ReconDamageZone *)new DamageZone(this, 0);	// this[0x38] = FUN_0041de1c(new 0x160, this, 0)
 }
 
@@ -162,7 +180,7 @@ MechSubsystem::MechSubsystem(
 	controlDestination	= 0;					// this[0x3a]=param_6 (ctor pass-through;
 	controlMessageID	= 0;					// this[0x3b]=param_7  weapons override -- task #6)
 	resource		= subsystem_resource;		// this[0x3c]
-	vitalSubsystemIndex	= -1;					// this[0x44]
+	configureActivePress	= -1;				// this[0x44] configure-session idle
 	vitalSubsystem	= (subsystem_resource->vitalSubsystemIndex == 1);	// res+0x48==1
 
 	BindName(refCount, subsystem_resource->videoObjectName);	// res+0x4c
diff --git a/game/reconstructed/mechsub.hpp b/game/reconstructed/mechsub.hpp
index c1c5bee..cd7333b 100644
--- a/game/reconstructed/mechsub.hpp
+++ b/game/reconstructed/mechsub.hpp
@@ -137,6 +137,21 @@ class Damage;
 		static Recon	MessageHandlers;		// SharedData ctor operand
 		enum { StateCount = 7 };				// TechStatusTypeCount
 
+		// Attribute Support (AUDIO_FIDELITY.md F15): the binary registers
+		// ConfigureActivePress as a MechSubsystem-BASE attribute (id 2,
+		// descriptor @0x50de5c -> subsystem+0x110) -- the configure-session
+		// flag every weapon's ConfigureMappables handler drives (0 open /
+		// -1 idle) and the authored configure-ticker audio watches at
+		// thresh=-1.  Publishing here makes it resolve on EVERY subsystem
+		// (each reads its own +0x110) and restores the binary-authentic
+		// dense id numbering (children start at 3, not 2).
+		enum {
+			ConfigureActivePressAttributeID = Simulation::NextAttributeID,	// 2
+			NextAttributeID													// 3
+		};
+		static const IndexEntry AttributePointers[];
+		static AttributeIndexSet& GetAttributeIndex();
+
 		// alarm-changed callback (vtable slot +0x34) + host back-pointer
 		void			OnAlarmChanged();
 		Mech			*owner;					// owning mech (== hostEntity)
@@ -307,7 +322,10 @@ class Damage;
 		int				printSimulationState;	// @0x104 this[0x41]
 		Scalar			criticalReference;	// @0x108 this[0x42]
 		Scalar			collisionCriticalHitWeight;	// @0x10C this[0x43]
-		int				vitalSubsystemIndex;	// @0x110 this[0x44] (default -1)
+		int				configureActivePress;	// @0x110 this[0x44] (default -1) -- the
+												// configure-session flag (was misnamed
+												// vitalSubsystemIndex; the reader is the
+												// authored audio configure-ticker, F15)
 	};
 
 #endif
diff --git a/game/reconstructed/mechweap.cpp b/game/reconstructed/mechweap.cpp
index 7bfe790..10db641 100644
--- a/game/reconstructed/mechweap.cpp
+++ b/game/reconstructed/mechweap.cpp
@@ -123,18 +123,14 @@ const MechWeapon::IndexEntry
 	// binary's (layout static_assert-locked); TriggerState stays the streamed
 	// fire-button binding (id 0x13 PINNED).
 	//
-	// The five PADS fill our chain-vs-binary id gap (0x0D..0x11) with valid,
+	// The PADS fill our chain-vs-binary id gap (now 0x0F..0x11) with valid,
 	// named, never-bound entries (the binary's own ids here are the powered/
 	// aux-screen family we don't publish); target = rechargeLevel, harmless.
-	{ (int)MechWeapon::MechWeaponPadFirstAttributeID + 0, "MechWeaponPad0D",
+	{ (int)MechWeapon::MechWeaponPadFirstAttributeID + 0, "MechWeaponPad0F",
 		(Simulation::AttributePointer)&MechWeapon::rechargeLevel },
-	{ (int)MechWeapon::MechWeaponPadFirstAttributeID + 1, "MechWeaponPad0E",
+	{ (int)MechWeapon::MechWeaponPadFirstAttributeID + 1, "MechWeaponPad10",
 		(Simulation::AttributePointer)&MechWeapon::rechargeLevel },
-	{ (int)MechWeapon::MechWeaponPadFirstAttributeID + 2, "MechWeaponPad0F",
-		(Simulation::AttributePointer)&MechWeapon::rechargeLevel },
-	{ (int)MechWeapon::MechWeaponPadFirstAttributeID + 3, "MechWeaponPad10",
-		(Simulation::AttributePointer)&MechWeapon::rechargeLevel },
-	{ (int)MechWeapon::MechWeaponPadFirstAttributeID + 4, "MechWeaponPad11",
+	{ (int)MechWeapon::MechWeaponPadFirstAttributeID + 2, "MechWeaponPad11",
 		(Simulation::AttributePointer)&MechWeapon::rechargeLevel },
 	ATTRIBUTE_ENTRY(MechWeapon, PercentDone,        rechargeLevel),		// 0x12 @0x320
 	ATTRIBUTE_ENTRY(MechWeapon, TriggerState,       fireImpulse),		// 0x13 @0x31C
@@ -145,7 +141,7 @@ const MechWeapon::IndexEntry
 	ATTRIBUTE_ENTRY(MechWeapon, PipColor,           pipColor),			// 0x18 @0x33C
 	ATTRIBUTE_ENTRY(MechWeapon, PipExtendedRange,   pipExtendedRange),	// 0x19 @0x348
 	ATTRIBUTE_ENTRY(MechWeapon, EstimatedReadyTime, estimatedReadyTime),// 0x1A @0x330
-	ATTRIBUTE_ENTRY(MechWeapon, RearFiring,         usesExternalModel),	// 0x1B @0x334
+	ATTRIBUTE_ENTRY(MechWeapon, RearFiring,         rearFiring),		// 0x1B @0x334 (task #68: real semantics)
 	ATTRIBUTE_ENTRY(MechWeapon, WeaponState,        weaponAlarm),		// 0x1C @0x350
 	ATTRIBUTE_ENTRY(MechWeapon, OutputVoltage,      rechargeLevel)		// 0x1D (port alias)
 };
@@ -183,7 +179,7 @@ MechWeapon::SharedData
 // Release: close the session (mode restored, temp layer stripped).
 // The +0x110 write (0 open / -1 idle) is the binary's config-session flag
 // (ctor default -1, part_012.c:15775); the port field carries the older name
-// vitalSubsystemIndex -- no confirmed reader yet (read-site survey pending).
+// configureActivePress -- the reader is the authored audio configure ticker (F15).
 //
 void
 	MechWeapon::ConfigureMappablesMessageHandler(
@@ -205,11 +201,11 @@ void
 	if (value < 1)
 	{
 		mapper->ExitConfiguration(element);				// vtbl+0x3C
-		vitalSubsystemIndex = -1;						// this+0x110 -> idle
+		configureActivePress = -1;						// this+0x110 -> idle (audio ticker OFF)
 	}
 	else
 	{
-		vitalSubsystemIndex = 0;						// this+0x110 -> session open
+		configureActivePress = 0;						// this+0x110 -> session open (audio ticker ON)
 		mapper->EnterConfiguration(						// vtbl+0x38
 			element,
 			(ControlsButton *)&fireImpulse,				// this+0x31C (TriggerState)
@@ -319,9 +315,18 @@ MechWeapon::MechWeapon(
 	// removed.  The muzzle segment index is the inherited base slot this+0xdc (used by
 	// GetMuzzlePoint); the pip mount is gated by useConfiguredPip in DrawWeaponPip.
 
-	// usesExternalModel: True if the model name contains the marker substring
-	// (DAT_00511aa2); selects whether the configured pip is drawn.
-	usesExternalModel = (strstr(GetName(), "EXT") != 0) ? True : False;
+	// (task #68) REAR-FIRING: the binary ctor (@004b99a8 tail, part_013.c:6913-
+	// 6930) resolves the weapon's MOUNT SEGMENT page name and tests it for the
+	// marker 'b' (DAT_00511aa2) -- the back gun ports (sitelbgunport /
+	// siterbgunport).  Rear-mounted weapons fire only into the LOOK-BACK view.
+	{
+		extern int BTWeaponMountIsRear(void *ownerMech, int segIndex);
+		rearFiring = BTWeaponMountIsRear(owner, GetSegmentIndex()) ? True : False;
+		if (getenv("BT_PROJ_LOG")) { static int s_rf=0; if (s_rf++<40)
+			DEBUG_STREAM << "[rearfire] weapon '" << GetName()
+				<< "' seg=" << GetSegmentIndex()
+				<< " rear=" << (int)rearFiring << "\n" << std::flush; }
+	}
 
 	fireImpulse				= 0.0f;		// 0x31C
 	// task #6: the binary MechWeapon ctor defaults its controls-destination
@@ -333,7 +338,7 @@ MechWeapon::MechWeapon(
 	rechargeLevel			= 1.0f;		// 0x320  (fully charged)
 	previousFireImpulse		= 0.0f;		// 0x3A4
 	recoil					= 0.0f;		// 0x3E8
-	useConfiguredPip		= (usesExternalModel == 0);	// 0x3E0
+	viewFireEnable			= (rearFiring == 0);	// 0x3E0 (spawn in the forward view)
 	estimatedReadyTime		= 0;		// 0x330 (binary attr "EstimatedReadyTime")
 
 	Check_Fpu();
@@ -500,8 +505,21 @@ Logical
 		rangeToTarget = (Scalar)Sqrt(				// FUN_004dd138
 			delta.x * delta.x + delta.y * delta.y + delta.z * delta.z);
 
-		// 1.0f == _DAT_004b9c98; heatLoad is the inherited HeatableSubsystem load.
-		effectiveRange = (1.0f - heatLoad) * weaponRange;	// *0x32c
+		// AUTHENTIC (decomp @004b9bdc:6983): effectiveRange = (1 - hostZoneDamage) *
+		// weaponRange, where hostZoneDamage is this weapon's OWN DamageZone.damageLevel
+		// (the QUALIFIED Subsystem::damageZone @0xE0 -> damageLevel +0x158), NOT
+		// heatLoad.  The old `heatLoad` read was the SAME @0xE0-vs-heat misattribution
+		// already corrected in HeatSink::UpdateCoolant (heat.cpp:803): for a charge/
+		// discharge weapon (ER laser) the weapon's OWN heatLoad swings 0..1 every cycle,
+		// so effectiveRange collapsed toward 0 and the weapon was perpetually "out of
+		// range" -- no damage submission, hence no impact explosion (user report:
+		// lackluster/absent laser hits on mechs AND buildings, esp. the ER medium).
+		// An UNDAMAGED weapon has damageLevel 0 -> full, STABLE weaponRange.  Use the
+		// QUALIFIED engine zone -- MechSubsystem::damageZone is a shim SHADOW (heat.cpp:812).
+		// 1.0f == _DAT_004b9c98.
+		::DamageZone *hostZone = this->Subsystem::damageZone;				// @0xE0
+		Scalar hostZoneDamage  = (hostZone != 0) ? hostZone->damageLevel : 0.0f;	// +0x158
+		effectiveRange = (1.0f - hostZoneDamage) * weaponRange;				// *0x32c
 
 		targetWithinRange = (effectiveRange > rangeToTarget) ? True : False;
 	}
@@ -878,3 +896,22 @@ int
 
 	return True;
 }
+
+//#############################################################################
+// Rear-fire bridges (task #68) -- complete-MechWeapon-type helpers for the
+// Mech ctor's rear-arsenal OR and the mapper's look-state commit (both TUs
+// hold only Subsystem*; the old SubProxy::IsDerivedFrom stub returned 0, so
+// the roster loop's capabilityFlags read never ran).
+//#############################################################################
+int BTWeaponIsRearFiring(Subsystem *sub)		// -1 = not a MechWeapon
+{
+	if (sub == 0 || !sub->IsDerivedFrom(MechWeapon::ClassDerivations))
+		return -1;
+	return (((MechWeapon *)sub)->GetRearFiring() != 0) ? 1 : 0;
+}
+
+void BTWeaponSetViewFireEnable(Subsystem *sub, int enable)
+{
+	if (sub != 0 && sub->IsDerivedFrom(MechWeapon::ClassDerivations))
+		((MechWeapon *)sub)->SetViewFireEnable(enable);
+}
diff --git a/game/reconstructed/mechweap.hpp b/game/reconstructed/mechweap.hpp
index 446fccd..452bc61 100644
--- a/game/reconstructed/mechweap.hpp
+++ b/game/reconstructed/mechweap.hpp
@@ -184,8 +184,14 @@ class CockpitHud;
 			// is a latent AV (gotcha #11; the old pinned table survived on
 			// heap luck -- the renumber reshuffled allocations and it fired
 			// live in WeaponCluster's "PercentDone" resolve).  Pads below fill
-			// ids 0x0D..0x11 (the mech.cpp attrPad idiom).
-			MechWeaponPadFirstAttributeID = 0x0D,	// == PoweredSubsystem::NextAttributeID (locked below)
+			// ids 0x0F..0x11 (the mech.cpp attrPad idiom).  F15: the base
+			// MechSubsystem now publishes ConfigureActivePress (binary id 2),
+			// shifting the parent chain end 0x0D -> 0x0E -- which matches the
+			// binary's own numbering (the old 0x0D chain was one LOW because
+			// the base attribute was missing).  One pad absorbed.  F6: HeatSink
+			// now publishes ReportLeak (binary id 12) -> 0x0E -> 0x0F; another
+			// pad absorbed (each authentic parent attr closes the gap by one).
+			MechWeaponPadFirstAttributeID = 0x0F,	// == PoweredSubsystem::NextAttributeID (locked below)
 			PercentDoneAttributeID = 0x12,		// @0x320 rechargeLevel
 			TriggerStateAttributeID,			// 0x13  @0x31C (PINNED -- the fire-button binding)
 			DistanceToTargetAttributeID,		// 0x14  @0x324 rangeToTarget
@@ -392,7 +398,17 @@ class CockpitHud;
 		Scalar	weaponRange;			// @0x32C  resource WeaponRange (configured max)
 		int		estimatedReadyTime;		// @0x330  reset 0  (binary attr 0x1A "EstimatedReadyTime"
 											//   names this slot -- resolves the old pipState TODO)
-		Logical	usesExternalModel;		// @0x334  the "EXT" model-name marker; the binary attr
+	public:
+		// (task #68) rear-fire accessors for the complete-type bridges
+		int  GetRearFiring() const			{ return (int)rearFiring; }
+		void SetViewFireEnable(int enable)	{ viewFireEnable = enable ? True : False; }
+	protected:
+		Logical	rearFiring;				// @0x334  REAR-MOUNTED weapon (task #68): the binary ctor
+										//   sets it iff the MOUNT SEGMENT's page name contains 'b'
+										//   (marker @0x511aa2; the back ports sitelbgunport/
+										//   siterbgunport -- blackhawk + owens author them).  The
+										//   old "EXT in the weapon name" was a double misread.
+										//   The binary attr
 											//   0x1B names this slot "RearFiring" (an EXT/rear-mount
 											//   weapon fires backward)
 		int		pipPosition;			// @0x338  resource PipPosition
@@ -409,7 +425,11 @@ class CockpitHud;
 
 		Scalar	heatCostToFire;			// @0x3D8  resource HeatCostToFire
 		Scalar	rechargeRate;			// @0x3DC  resource RechargeRate
-		Logical	useConfiguredPip;		// @0x3E0  = (usesExternalModel == 0)  (best-effort)
+		Logical	viewFireEnable;			// @0x3E0  "enabled in the CURRENT look view" (task #68):
+										//   forward view = !rearFiring, rear view = rearFiring,
+										//   side/down views = 0 (the mapper look-state commit
+										//   toggles it).  Gates BOTH firing (the emitter
+										//   Loaded->Firing gate reads it) and the HUD pip.
 		ResourceDescription::ResourceID
 				explosionResourceID;	// @0x3E4  resource ExplosionModelFile
 	public:
@@ -427,7 +447,7 @@ class CockpitHud;
 		// collided with the Emitter subclass's own fields at 0x3F0+; removed:
 		//   * segmentReference -> the muzzle segment is the inherited base slot this+0xdc
 		//     (GetMuzzlePoint resolves it live via the mech4 BTResolveWeaponMuzzle bridge)
-		//   * pipSegment       -> DrawWeaponPip gates on useConfiguredPip
+		//   * pipSegment       -> DrawWeaponPip gates on viewFireEnable
 		//   * hasTarget        -> dead (HasActiveTarget reads owner+0x388)
 		//   * targetPoint      -> GetTargetPosition reads owner+0x37c
 		//   * muzzlePoint      -> resolved live by GetMuzzlePoint
diff --git a/game/reconstructed/mislanch.cpp b/game/reconstructed/mislanch.cpp
index e755281..1c349eb 100644
--- a/game/reconstructed/mislanch.cpp
+++ b/game/reconstructed/mislanch.cpp
@@ -73,7 +73,7 @@
 extern void BTPushProjectile(const Point3D &muzzle, void *shooter, void *target,
 							 const Point3D &targetPos, Scalar speed, Scalar damage,
 							 const Vector3D *launch_velocity = 0, int guided = 1,
-							 int weapon_subsys = -1, int splash_burst = 0);
+							 int weapon_subsys = -1, int splash_burst = 0, int muzzle_seg = -1);
 
 //###########################################################################
 // Port-side salvo replication state (missile-visibility wave).
@@ -267,6 +267,12 @@ void MissileLauncher::FireWeapon()
 {
 	Check(this);
 
+	// (task #68) the view gate: a weapon disabled in the CURRENT look view
+	// (rear rack in the forward view, anything in a side view) does not fire
+	// -- the same +0x3E0 gate the emitter's Loaded->Firing transition reads.
+	if (!viewFireEnable)
+		return;
+
 	// THE FIRING HEAT (task #9): heatCostToFire RAW into the launcher's own
 	// pendingHeat (pre-scaled 1e7-unit resources: SRM6 = 5e7, LRM15 = 6.5e7)
 	// -- the binary's add @part_013.c:8744-8747, gated on the heatable check.
@@ -317,7 +323,8 @@ void MissileLauncher::FireWeapon()
 						 (i == 0) ? damageData.damageAmount : 0.0f,
 						 &launchVelocity, 1,
 						 subsystemID /*messmgr explosion bundling at impact (task #7)*/,
-						 (i == 0) ? nmiss : 0 /*salvo-lead: cluster splash baseBurst*/);
+						 (i == 0) ? nmiss : 0 /*salvo-lead: cluster splash baseBurst*/,
+						 GetSegmentIndex() /*task #67: launch through the MOUNT frame (torso twist)*/);
 
 	// Salvo replication (missile-visibility wave): bump the fire counter + stamp
 	// the aim point; the extended update record carries both to peer nodes.
@@ -389,7 +396,8 @@ void
 		for (int i = 0; i < n; ++i)
 			BTPushProjectile(mz, owner, 0 /*no entity: aim point only*/,
 							 rec->salvoTarget, spd, 0.0f /*VISUAL*/, &launchVelocity, 1,
-							 subsystemID /*per-round detonation resolve on this node*/);
+							 subsystemID /*per-round detonation resolve on this node*/,
+							 0, GetSegmentIndex() /*task #67 mount frame*/);
 		if (getenv("BT_PROJ_LOG"))
 			DEBUG_STREAM << "[projectile] REPLICANT salvo x" << n
 				<< " at(" << rec->salvoTarget.x << "," << rec->salvoTarget.y
diff --git a/game/reconstructed/missile.cpp b/game/reconstructed/missile.cpp
index b4a531a..4b3faa3 100644
--- a/game/reconstructed/missile.cpp
+++ b/game/reconstructed/missile.cpp
@@ -219,6 +219,17 @@ void Missile::MoveAndCollide(Scalar time_slice)
 	if (thruster != 0)
 		thruster->MissileThrusterSimulation(time_slice);	// bleed burnTimeRemaining
 
+	// (AUDIO_FIDELITY F7) report the threat to the homing target: the mech's
+	// IncomingLock/DistanceToMissile attributes (binary @0x3fc/0x400) drive
+	// the authored missile-alarm beeper whose TEMPO rises as we close.
+	if (seeker != 0 && seeker->targetEntity != 0 && (simulationFlags & 1) == 0)
+	{
+		extern void BTReportIncomingMissile(Entity *target, Scalar range);
+		Vector3D to_target;
+		to_target.Subtract(seeker->targetPosition, localOrigin.linearPosition);
+		BTReportIncomingMissile(seeker->targetEntity, to_target.Length());
+	}
+
 	// --- guidance: build steering toward the Seeker's lead point ----------
 	Vector3D forward;
 	GetForward(forward);								// FUN_0040d150(.., +0x100)
diff --git a/game/reconstructed/myomers.hpp b/game/reconstructed/myomers.hpp
index 9bf14ed..60ca9cd 100644
--- a/game/reconstructed/myomers.hpp
+++ b/game/reconstructed/myomers.hpp
@@ -340,7 +340,6 @@ class Mech;
 		Scalar	heatRangeSquared;			// @0x34C  ctor = heatRange*heatRange (degradation-curve denominator)
 		Scalar	velocityEfficiency;			// @0x350  resource +0x190
 		Scalar	accelerationEfficiency;		// @0x354  resource +0x194
-
 		friend struct MyomersLayoutCheck;
 	};
 
diff --git a/game/reconstructed/powersub.cpp b/game/reconstructed/powersub.cpp
index 95a1a03..fdf9041 100644
--- a/game/reconstructed/powersub.cpp
+++ b/game/reconstructed/powersub.cpp
@@ -885,7 +885,9 @@ int
 const Generator::IndexEntry
 	Generator::AttributePointers[]=
 {
-	ATTRIBUTE_ENTRY(Generator, OutputVoltage, outputVoltage)	// @0x1DC
+	ATTRIBUTE_ENTRY(Generator, OutputVoltage, outputVoltage),	// @0x1DC
+	ATTRIBUTE_ENTRY(Generator, GeneratorState, stateAlarm),		// @0x1FC (0x54 StateIndicator-compatible alarm; SetLevel fires audio)
+	ATTRIBUTE_ENTRY(Generator, GeneratorOn,    generatorOn)		// @0x1D4 (AudioLogicalTrigger; init 1 -- static until a shutdown writer drives it to 0)
 };
 
 Generator::AttributeIndexSet&
diff --git a/game/reconstructed/powersub.hpp b/game/reconstructed/powersub.hpp
index d764bb3..0d73758 100644
--- a/game/reconstructed/powersub.hpp
+++ b/game/reconstructed/powersub.hpp
@@ -342,6 +342,8 @@ class Generator;
 	public:
 		enum {
 			OutputVoltageAttributeID = HeatSink::NextAttributeID,
+			GeneratorStateAttributeID,		// audio binds an AudioStateWatcher -> stateAlarm (0x54 StateIndicator)
+			GeneratorOnAttributeID,			// audio binds an AudioLogicalTrigger -> generatorOn (@0x1D4)
 			NextAttributeID
 		};
 	private:
diff --git a/game/reconstructed/projweap.cpp b/game/reconstructed/projweap.cpp
index 032adeb..593cd02 100644
--- a/game/reconstructed/projweap.cpp
+++ b/game/reconstructed/projweap.cpp
@@ -95,7 +95,7 @@
 extern void BTPushProjectile(const Point3D &muzzle, void *shooter, void *target,
 							 const Point3D &targetPos, Scalar speed, Scalar damage,
 							 const Vector3D *launch_velocity = 0, int guided = 1,
-							 int weapon_subsys = -1, int splash_burst = 0);	// AC: no cluster splash (default 0)
+							 int weapon_subsys = -1, int splash_burst = 0, int muzzle_seg = -1);	// AC: no cluster splash (default 0)
 
 
 //#############################################################################
@@ -673,6 +673,18 @@ void
 			if (weaponAlarm.GetState() != NoAmmoState && weaponAlarm.GetState() != JammedState)
 				weaponAlarm.SetLevel(0);				// Firing
 		}
+		else
+		{
+			// Idle/reload: drive the ready state so the WeaponState audio is correct.
+			// The recon set Firing(0)/Loading(3)/Jammed/NoAmmo but NEVER a ready level,
+			// so at idle the launcher sat in Loading(3) forever and its WeaponState
+			// audio looped MissileLoading indefinitely (the loop stops only when the
+			// alarm LEAVES the loading state).  Reflect readiness: Loaded(2, charge +
+			// ammo up = silent ready) once ReadyToFire, else Loading(3, reloading) --
+			// SetLevel fires audio only on a real change, so this just yields the
+			// natural Firing -> Loading(reload) -> Loaded(ready) cycle.  [T2]
+			weaponAlarm.SetLevel(ReadyToFire() ? 2 : 3);
+		}
 		break;
 	}
 
@@ -691,6 +703,11 @@ void
 {
 	Check(this);
 
+	// (task #68) the view gate: a weapon disabled in the CURRENT look view
+	// does not fire (see mislanch.cpp / the emitter's Loaded->Firing gate).
+	if (!viewFireEnable)
+		return;
+
 	// THE FIRING HEAT (task #9; was "a separate pre-existing gap"): the
 	// binary adds heatCostToFire RAW to the weapon's own pendingHeat --
 	// projectile resources author PRE-scaled 1e7-unit heat (AFC100 = 6.5e7)
@@ -834,7 +851,8 @@ void
 					  || rec->fireTarget.z != 0.0f);
 	BTPushProjectile(mz, owner, 0 /*aim point only, no entity*/, rec->fireTarget,
 					 spd, 0.0f /*VISUAL*/,
-					 haveAim ? 0 : &launchVelocity, 0 /*ballistic*/, subsystemID);
+					 haveAim ? 0 : &launchVelocity, 0 /*ballistic*/, subsystemID,
+					 0, GetSegmentIndex() /*task #67 mount frame*/);
 
 	const char *mzf = getenv("BT_MUZZLE");					// default ON; =0 disables
 	if (mzf == 0 || mzf[0] != '0')
diff --git a/game/reconstructed/sensor.hpp b/game/reconstructed/sensor.hpp
index 9b5db12..8d69969 100644
--- a/game/reconstructed/sensor.hpp
+++ b/game/reconstructed/sensor.hpp
@@ -168,6 +168,7 @@
 			badVoltage;			// @0x324  ctor init 0
 
 
+
 //##########################################################################
 // Simulation Support
 //
diff --git a/game/reconstructed/seqctl.cpp b/game/reconstructed/seqctl.cpp
index 1a6ab31..9c57aee 100644
--- a/game/reconstructed/seqctl.cpp
+++ b/game/reconstructed/seqctl.cpp
@@ -149,6 +149,10 @@ void
 	int *hdr = (int *)desc->resourceAddress;	// resource data (binary: *(desc+0x3c))
 	keyframeCount = hdr[0];						// @0x14 frameCount
 	jointCount    = hdr[1];						// @0x18 jointCount
+	// (AUDIO_FIDELITY F5) hdr[2] = the clip's authored footstep contact
+	// threshold (root height); previously skipped.  Same capture as the
+	// engine's AnimationInstance (JMOVER.cpp:1415).
+	footStepThreshold = (Scalar *)(hdr + 2);	// @0x20
 
 	int *p = hdr + 3;							// jointIndices follow hdr[0..2]
 	jointIndices  = p;							// @0x1c (jointCount ints)
diff --git a/game/reconstructed/torso.cpp b/game/reconstructed/torso.cpp
index 232b5dd..5808b87 100644
--- a/game/reconstructed/torso.cpp
+++ b/game/reconstructed/torso.cpp
@@ -143,11 +143,45 @@ Receiver::MessageHandlerSet
 Torso::AttributeIndexSet
 	Torso::AttributeIndex;
 
+// (AUDIO_FIDELITY F16) the real Torso attribute table, binary parity (dense
+// ids 3..15 from MechSubsystem::NextAttributeID; offsets are the binary's,
+// documented on the members).  Un-deadens the torso-twist servo whir:
+// TorsoTwistInt01/Ext01 pitch/gate on SpeedOfTorsoHorizontal, the stop clunk
+// matches MotionState==2 (the limit-hit frame statusFlags already publishes).
+const Torso::IndexEntry
+	Torso::AttributePointers[]=
+{
+	ATTRIBUTE_ENTRY(Torso, RotationOfTorsoVertical,   currentElevation),		// 3  @0x1E4
+	ATTRIBUTE_ENTRY(Torso, RotationOfTorsoHorizontal, currentTwist),			// 4  @0x1D8
+	ATTRIBUTE_ENTRY(Torso, HorizontalLimitRight,      horizontalLimitRight),	// 5  @0x1DC
+	ATTRIBUTE_ENTRY(Torso, HorizontalLimitLeft,       horizontalLimitLeft),		// 6  @0x1E0
+	ATTRIBUTE_ENTRY(Torso, SpeedOfTorsoVertical,      elevationVelocity),		// 7  @0x1EC
+	ATTRIBUTE_ENTRY(Torso, SpeedOfTorsoHorizontal,    twistVelocity),			// 8  @0x1E8
+	ATTRIBUTE_ENTRY(Torso, StickPosition,             analogTwistAxis),			// 9  @0x1F0
+	ATTRIBUTE_ENTRY(Torso, TorsoUp,                   elevateUpCommand),		// 10 @0x1F8
+	ATTRIBUTE_ENTRY(Torso, TorsoDown,                 elevateDownCommand),		// 11 @0x1FC
+	ATTRIBUTE_ENTRY(Torso, TorsoLeft,                 twistLeftCommand),		// 12 @0x200
+	ATTRIBUTE_ENTRY(Torso, TorsoRight,                twistRightCommand),		// 13 @0x204
+	ATTRIBUTE_ENTRY(Torso, TorsoCenter,               centerCommand),			// 14 @0x208
+	ATTRIBUTE_ENTRY(Torso, MotionState,               statusFlags)				// 15 @0x20C
+};
+
+Torso::AttributeIndexSet&
+	Torso::GetAttributeIndex()
+{
+	static Torso::AttributeIndexSet attributeIndex(
+		ELEMENTS(Torso::AttributePointers),
+		Torso::AttributePointers,
+		MechSubsystem::GetAttributeIndex()
+	);
+	return attributeIndex;
+}
+
 Torso::SharedData
 	Torso::DefaultData(
 		&Torso::ClassDerivations,
 		Torso::MessageHandlers,
-		Torso::AttributeIndex,
+		Torso::GetAttributeIndex(),
 		Torso::StateCount
 	);
 
diff --git a/game/reconstructed/torso.hpp b/game/reconstructed/torso.hpp
index 25b1cb8..89a8da8 100644
--- a/game/reconstructed/torso.hpp
+++ b/game/reconstructed/torso.hpp
@@ -100,6 +100,34 @@ class Joint;			// engine skeleton node (JOINT.h); the twist target
 		static Receiver::MessageHandlerSet MessageHandlers;
 		static AttributeIndexSet AttributeIndex;
 
+		// (AUDIO_FIDELITY F16) the binary Torso attribute table [T1, rows
+		// keyed on the SpeedOfTorsoHorizontal string]: dense ids 3..15
+		// starting at MechSubsystem::NextAttributeID (HeatWatcher/PowerWatcher
+		// publish nothing -- binary parity).  The authored torso-twist servo
+		// whir reads SpeedOfTorsoHorizontal (scale: pitch over 0.5..0.9 +
+		// start/stop trigger at 0.25 -- the |yaw rate| the binary abs's) and
+		// MotionState (match ==2 = limit-hit frame -> the stop clunk).
+		enum {
+			RotationOfTorsoVerticalAttributeID = MechSubsystem::NextAttributeID,	// 3  @0x1E4 currentElevation
+			RotationOfTorsoHorizontalAttributeID,	// 4  @0x1D8 currentTwist
+			HorizontalLimitRightAttributeID,		// 5  @0x1DC
+			HorizontalLimitLeftAttributeID,			// 6  @0x1E0
+			SpeedOfTorsoVerticalAttributeID,		// 7  @0x1EC elevationVelocity (|rate|)
+			SpeedOfTorsoHorizontalAttributeID,		// 8  @0x1E8 twistVelocity (|rate|)
+			StickPositionAttributeID,				// 9  @0x1F0 analogTwistAxis
+			TorsoUpAttributeID,						// 10 @0x1F8 elevateUpCommand
+			TorsoDownAttributeID,					// 11 @0x1FC elevateDownCommand
+			TorsoLeftAttributeID,					// 12 @0x200 twistLeftCommand
+			TorsoRightAttributeID,					// 13 @0x204 twistRightCommand
+			TorsoCenterAttributeID,					// 14 @0x208 centerCommand
+			MotionStateAttributeID,					// 15 @0x20C statusFlags
+			NextAttributeID
+		};
+	private:
+		static const IndexEntry AttributePointers[];
+	public:
+		static AttributeIndexSet& GetAttributeIndex();
+
 	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 	// BT segment / base-state / joint compatibility shims.
 	//
diff --git a/scratchpad/afc_dump.py b/scratchpad/afc_dump.py
new file mode 100644
index 0000000..f885be1
--- /dev/null
+++ b/scratchpad/afc_dump.py
@@ -0,0 +1,37 @@
+import struct
+data = open(r'C:/git/bt411/content/BTL4.RES','rb').read()
+n = len(data)
+def f32(o): return struct.unpack_from('<f', data, o)[0]
+def i32(o): return struct.unpack_from('<i', data, o)[0]
+def cstr(o, m=32):
+    s = data[o:o+m].split(b'\0')[0]
+    try: return s.decode('ascii')
+    except: return None
+
+# find AFC100 subsystem records (name @+0, classID @+0x20)
+hits=[]
+i=0
+while i < n-0x28:
+    if data[i:i+7]==b'AFC100\0':
+        cid=struct.unpack_from('<I',data,i+0x20)[0]
+        sz=struct.unpack_from('<I',data,i+0x24)[0]
+        if 0xBB0<=cid<=0xBE5 and 0xE0<=sz<=0x300:
+            hits.append((i,cid,sz))
+    i+=1
+print("AFC100 records:", [(hex(p),hex(c),hex(s)) for p,c,s in hits])
+if hits:
+    p,cid,sz=hits[0]
+    print(f"\n=== AFC100 @ {hex(p)} classID={hex(cid)} size={hex(sz)} ===")
+    # dump the offsets the loader reads (per heat.cpp / mechweap.hpp comments)
+    fields = {
+        0xE4:"startingTemp", 0xE8:"degradationTemp", 0xEC:"failureTemp",
+        0xF0:"thermalConductance", 0xF4:"thermalMass",
+        0x1A4:"heatCostToFire", 0x1CC:"minJamChance",
+    }
+    for off,name in sorted(fields.items()):
+        print(f"  +{hex(off):>6} {name:20} f32={f32(p+off):<16g} i32={i32(p+off)}")
+    print("\n  --- full float scan (offset: value) for plausible fields 0xE0..0x1E0 ---")
+    for off in range(0xE0, 0x1E0, 4):
+        v=f32(p+off)
+        if abs(v)>1e-3 and abs(v)<1e12:
+            print(f"    +{hex(off):>6}: {v:g}")
diff --git a/scratchpad/btconsole_stuck.py b/scratchpad/btconsole_stuck.py
new file mode 100644
index 0000000..a83fbe4
--- /dev/null
+++ b/scratchpad/btconsole_stuck.py
@@ -0,0 +1,95 @@
+#!/usr/bin/env python3
+"""btconsole_stuck.py -- a DELIBERATELY-STUCK console for reproducing the
+'console death froze peer replication' open question (task #50 / open-questions.md).
+
+It behaves like tools/btconsole.py (connect, stream egg, send RunMission x2, drain
+the pod->console stream) BUT after STUCK_AFTER seconds it STOPS draining while
+holding the socket OPEN -- i.e. it stops calling recv(). This is the authentic
+'receive pad full -> close never seen' failure mode (NOT a clean disconnect): the
+pod keeps queueing pod->console packets, the TCP window closes, and we watch
+whether the pod's CheckBuffers loop stalls the GAME peers behind the wedged
+console host.
+
+Usage:  python btconsole_stuck.py <EGG> host:port host:port  [STUCK_AFTER_secs]
+Env: none. STUCK_AFTER default 12s after the 2nd RunMission.
+"""
+import socket, struct, sys, time, threading, os
+
+CHUNK = 1000
+PKT_FMT_HDR = "<iiii"
+PKT_FMT_MSG = "<IiIiii"
+MESSAGE_LENGTH = 1024
+EGG_MESSAGE_ID = 3
+RELIABLE_FLAG = 1
+CONSOLE_HOST_ID = 1
+APPLICATION_CLIENT_ID = 4
+RUN_MISSION_MESSAGE_ID = 5
+LAUNCH_SETTLE_SECONDS = 20.0
+LAUNCH_STEP_SECONDS = 4.0
+STUCK_AFTER = float(sys.argv[4]) if len(sys.argv) > 4 else 12.0
+
+def run_mission_packet():
+    pkt = struct.pack(PKT_FMT_HDR, APPLICATION_CLIENT_ID, 0, CONSOLE_HOST_ID, 0)
+    pkt += struct.pack("<IiI", 12, RUN_MISSION_MESSAGE_ID, RELIABLE_FLAG)
+    return pkt
+
+def egg_wire_bytes(b):
+    return b"".join(l + b"\0" for l in b.replace(b"\r\n", b"\n").split(b"\n"))
+
+def egg_packets(egg_bytes):
+    total = len(egg_bytes); seq = 0; off = 0
+    while off < total:
+        chunk = egg_bytes[off:off+CHUNK]
+        pkt = struct.pack(PKT_FMT_HDR, 0, 0, CONSOLE_HOST_ID, 0)
+        pkt += struct.pack(PKT_FMT_MSG, MESSAGE_LENGTH, EGG_MESSAGE_ID, RELIABLE_FLAG, seq, total, len(chunk))
+        pkt += chunk.ljust(CHUNK, b"\0")
+        yield pkt
+        off += len(chunk); seq += 1
+
+def serve_pod(hostport, egg_bytes):
+    host, port = hostport.rsplit(":", 1); port = int(port); name = f"{host}:{port}"
+    while True:
+        try:
+            s = socket.create_connection((host, port), timeout=5); break
+        except OSError as e:
+            print(f"[{name}] waiting for pod ({e})", flush=True); time.sleep(1)
+    print(f"[{name}] connected; streaming egg ({len(egg_bytes)} bytes)", flush=True)
+    for pkt in egg_packets(egg_bytes):
+        s.sendall(pkt)
+    print(f"[{name}] egg sent; launch in {LAUNCH_SETTLE_SECONDS}s", flush=True)
+    s.settimeout(2.0)
+    launch_at = time.time() + LAUNCH_SETTLE_SECONDS
+    launches_sent = 0
+    stuck_at = None
+    while True:
+        if launches_sent < 2 and time.time() >= launch_at:
+            s.sendall(run_mission_packet()); launches_sent += 1
+            launch_at = time.time() + LAUNCH_STEP_SECONDS
+            print(f"[{name}] RunMission #{launches_sent} sent", flush=True)
+            if launches_sent == 2:
+                stuck_at = time.time() + STUCK_AFTER
+        # *** THE FAILURE: once mission is running, stop draining after STUCK_AFTER ***
+        if stuck_at is not None and time.time() >= stuck_at:
+            print(f"[{name}] *** GOING STUCK: socket stays OPEN, no more recv() ***", flush=True)
+            while True:
+                time.sleep(60)   # hold the socket open, never drain it again
+        try:
+            data = s.recv(4096)
+            if not data:
+                print(f"[{name}] pod closed the console socket", flush=True); return
+        except socket.timeout:
+            continue
+        except OSError as e:
+            print(f"[{name}] socket error {e!r}", flush=True); return
+
+def main():
+    egg_path = sys.argv[1]
+    pods = sys.argv[2:4]
+    with open(egg_path, "rb") as f:
+        egg = egg_wire_bytes(f.read())
+    ts = [threading.Thread(target=serve_pod, args=(p, egg), daemon=True) for p in pods]
+    for t in ts: t.start()
+    while True: time.sleep(1)
+
+if __name__ == "__main__":
+    main()
diff --git a/tools/btconsole.py b/tools/btconsole.py
index bdeb29c..55cc238 100644
--- a/tools/btconsole.py
+++ b/tools/btconsole.py
@@ -122,7 +122,7 @@ def serve_pod(hostport, egg_bytes):
         try:
             data = s.recv(4096)
             if not data:
-                print(f"[{name}] pod closed the console socket")
+                print(f"[{name}] pod closed the console socket", flush=True)
                 return
             # Expect the AcknowledgeEggFile (and possibly other console traffic).
             if len(data) >= 24:
@@ -134,6 +134,14 @@ def serve_pod(hostport, egg_bytes):
                 print(f"[{name}] pod->console {len(data)} bytes")
         except socket.timeout:
             continue
+        except OSError as e:
+            # Previously UNHANDLED: a reset/abort here killed the thread silently
+            # (buffered stdout lost) and the console process exited -- leaving the
+            # pods holding dead console sockets.  Log it and keep the thread alive
+            # (idle) so the process + diagnosis survive.
+            print(f"[{name}] console socket error: {e!r} -- idling", flush=True)
+            while True:
+                time.sleep(60)
 
 
 def main():
diff --git a/tools/mp_launch.sh b/tools/mp_launch.sh
new file mode 100644
index 0000000..1892834
--- /dev/null
+++ b/tools/mp_launch.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+# mp_launch.sh -- launch a 2-node local multiplayer test (FOGDAY.EGG) with the two
+# game nodes PINNED TO DISJOINT CPU CORES + the console relay.
+#
+# WHY THE AFFINITY MATTERS (task #50, 2026-07-15): two Debug btl4 nodes on one box
+# fight for the same cores, and Windows punishes the contention by BATCHING their
+# TCP packet delivery -- update records that should arrive every ~17ms instead
+# arrive in bursts (measured gaps up to 226ms, burstiness 3-7x, BT_RXJIT).  A peer
+# dead-reckons across those gaps and then snaps when a record finally lands -> the
+# "random" shaky peer motion.  Pinning each node to its own core set restores even
+# ~17ms delivery (burstiness ~1.0) and the shakiness vanishes.  This is a SINGLE-BOX
+# TEST-RIG artifact -- real pods are dedicated machines and never see it; do NOT
+# "fix" it in the game with an interpolation buffer.
+#
+# Usage:  tools/mp_launch.sh [extra env for BOTH nodes...]
+#   e.g.  tools/mp_launch.sh BT_SLIDE=1
+# Run from the repo root; content/ must hold FOGDAY.EGG and the build in build/Debug.
+set -u
+cd "$(dirname "$0")/../content" || exit 1
+EXE=../build/Debug/btl4.exe
+EXTRA="$*"
+
+powershell -NoProfile -Command "Get-Process btl4,python -ErrorAction SilentlyContinue | Stop-Process -Force" 2>/dev/null
+sleep 2
+rm -f fa.log fb.log console.log
+
+env $EXTRA BT_DEV_GAUGES=1 BT_LOG=fb.log BT_START_INSIDE=1 BT_SPAWN_AT="40 -150"  "$EXE" -egg FOGDAY.EGG -net 1601 &
+sleep 2
+env $EXTRA BT_DEV_GAUGES=1 BT_LOG=fa.log BT_START_INSIDE=1 BT_SPAWN_AT="-40 -150" "$EXE" -egg FOGDAY.EGG -net 1501 &
+sleep 3
+
+# Pin the two nodes to disjoint core sets (0x00F = cores 0-3, 0x3C0 = cores 6-9).
+powershell -NoProfile -Command "\$ps=@(Get-Process btl4 | Sort-Object Id); if(\$ps.Count -ge 2){ \$ps[0].ProcessorAffinity=[IntPtr]0x00F; \$ps[1].ProcessorAffinity=[IntPtr]0x3C0; Write-Output ('PINNED '+\$ps[0].Id+'->cores0-3, '+\$ps[1].Id+'->cores6-9') } else { Write-Output ('WARN only '+\$ps.Count+' btl4 up') }"
+
+sleep 6
+python -u ../tools/btconsole.py FOGDAY.EGG 127.0.0.1:1501 127.0.0.1:1601 > console.log 2>&1 &
+echo "console streaming; nodes on 1501/1601. Logs: content/fa.log content/fb.log"
+wait
diff --git a/tools/sf2extract.py b/tools/sf2extract.py
new file mode 100644
index 0000000..fcd9bb2
--- /dev/null
+++ b/tools/sf2extract.py
@@ -0,0 +1,295 @@
+#!/usr/bin/env python3
+"""sf2extract.py -- extract the BattleTech AWE32 SoundFonts (AUDIO1/2.RES) into
+loose WAV files + generate the allPresets[] C++ table for the WinTesla port.
+
+FULL-ZONE extraction (AUDIO_FIDELITY.md F1/F2/F13/F14).  The banks are SoundFont
+**v1.0** (ifil 1.0, EMU8000): `shdr` records are 16 bytes {dwStart,dwEnd,
+dwStartLoop,dwEndLoop} (no name/rate/pitch field).  Samples are 16-bit mono PCM
+in `smpl`.  Preset -> instrument resolves phdr->pbag->pgen(41); every sample-
+bearing ibag zone of that instrument becomes a SAMPLEINFO slot.
+
+Per-zone recovered metadata:
+  keyRange(43)            -> keyLo/keyHi (SetupPatch selects zones by the note)
+  sampleModes(54)         -> loop flag (1/3 = loop)
+  samplePitch(55, SBK)    -> root*100+cents, present on every zone
+  overridingRootKey(58)   -> replaces the gen-55 root when present
+  coarseTune(51)/fineTune(52) -> added cents
+  initialAttenuation(48)  -> SBK INVERTED scale (127=full); 0.375 dB/step [T3],
+                             baked into the WAV PCM (layer balance)
+  releaseVolEnv(38)       -> timecents -> seconds, for the Stop-path gain fade
+  pan(17)                 -> 0..127 -> CHANNEL_LEFT/CENTER/RIGHT
+  shdr loop points        -> loopStart/loopEnd frames (AL_SOFT_loop_points)
+
+PITCH (F2, algebraically exact): EMU8000 v1 base rate is 44100 Hz; a zone's true
+data rate is baked into the WAV header as
+    rate = round(44100 * 2^(((6000 - effRootCents) + tuneCents) / 1200))
+so the engine's note-60 pitch model (BTNotePitchFactor) reproduces original
+playback at every note.  effRootCents = gen58*100 if present else gen55.
+
+Output:
+  content/AUDIO/<PresetName>[_zK].wav
+  game/reconstructed/audiopresets.cpp   (allPresets[2][128], all zones)
+
+Regenerate: python tools/sf2extract.py   (add --stats for the audit cross-check)
+"""
+import struct, os, sys, wave, math
+
+HERE = os.path.dirname(__file__)
+AUDIO = os.path.join(HERE, "..", "content", "AUDIO")
+OUT_CPP = os.path.join(HERE, "..", "game", "reconstructed", "audiopresets.cpp")
+BASE_RATE = 44100          # EMU8000 v1 (awesfx sffile.c hardcodes v1 samplerate 44100)
+MAX_ZONES = 25             # PRESETINFO samples[] capacity (AllExplosion = 25 layers)
+
+G_KEYRANGE, G_PAN, G_RELEASE, G_INST, G_KEYRANGE2 = 43, 17, 38, 41, 43
+G_ATTEN, G_COARSE, G_FINE, G_SAMPLEID, G_MODES, G_PITCH, G_ROOT = 48, 51, 52, 53, 54, 55, 58
+G_FILTER_FC, G_FILTER_Q = 8, 9
+SIGNED_GENS = {G_COARSE, G_FINE, G_RELEASE}
+
+
+def s16(v):
+    return v - 0x10000 if v >= 0x8000 else v
+
+
+class Bank:
+    def __init__(self, path):
+        d = open(path, "rb").read()
+        assert d[:4] == b"RIFF" and d[8:12] == b"sfbk"
+        self.d = d
+
+        def find(fc):
+            p = d.find(fc)
+            return p + 8, struct.unpack_from("<I", d, p + 4)[0]
+
+        smpl_o, smpl_s = find(b"smpl")
+        self.smpl = d[smpl_o:smpl_o + smpl_s]
+        self.pho, _ = find(b"phdr"); self.pbo, _ = find(b"pbag"); self.pgo, _ = find(b"pgen")
+        self.ino, _ = find(b"inst"); self.ibo, _ = find(b"ibag"); self.igo, _ = find(b"igen")
+        self.sho, _ = find(b"shdr")
+        self.nphdr = 0
+        while d[self.pho + self.nphdr * 38:self.pho + self.nphdr * 38 + 3] != b"EOP" and self.nphdr < 200:
+            self.nphdr += 1
+
+    def u16(self, o):
+        return struct.unpack_from("<H", self.d, o)[0]
+
+    def gens(self, base, g0, g1):
+        out = {}
+        for g in range(g0, g1):
+            op, amt = struct.unpack_from("<HH", self.d, base + g * 4)
+            out[op] = s16(amt) if op in SIGNED_GENS else amt
+        return out
+
+    def preset_zones(self, i):
+        """-> (name, presetNum, [zone-dict])  zone gens merged: inst-global <- inst-zone <- preset adds"""
+        name = self.d[self.pho + i * 38:self.pho + i * 38 + 20].split(b"\x00")[0].decode("latin1").strip()
+        preset, bank, pbag = struct.unpack_from("<HHH", self.d, self.pho + i * 38 + 20)
+        pbag2 = self.u16(self.pho + (i + 1) * 38 + 24)
+        zones = []
+        pglobal = {}
+        for b in range(pbag, pbag2):
+            pz = self.gens(self.pgo, self.u16(self.pbo + b * 4), self.u16(self.pbo + (b + 1) * 4))
+            if G_INST not in pz:
+                pglobal = pz                      # preset-level global zone
+                continue
+            inst = pz[G_INST]
+            ib, ib2 = self.u16(self.ino + inst * 22 + 20), self.u16(self.ino + (inst + 1) * 22 + 20)
+            iglobal = {}
+            for zb in range(ib, ib2):
+                iz = self.gens(self.igo, self.u16(self.ibo + zb * 4), self.u16(self.ibo + (zb + 1) * 4))
+                if G_SAMPLEID not in iz:
+                    iglobal = iz                  # instrument-level global zone
+                    continue
+                g = dict(iglobal); g.update(iz)
+                # preset-level: keyRange INTERSECTS, tunes/release ADD (rare in these banks)
+                for pk in (pglobal, pz):
+                    if G_KEYRANGE in pk and G_KEYRANGE in g:
+                        alo, ahi = g[G_KEYRANGE] & 0xFF, g[G_KEYRANGE] >> 8
+                        blo, bhi = pk[G_KEYRANGE] & 0xFF, pk[G_KEYRANGE] >> 8
+                        g[G_KEYRANGE] = max(alo, blo) | (min(ahi, bhi) << 8)
+                    elif G_KEYRANGE in pk:
+                        g[G_KEYRANGE] = pk[G_KEYRANGE]
+                    for add in (G_COARSE, G_FINE, G_RELEASE):
+                        if add in pk:
+                            g[add] = g.get(add, 0) + pk[add]
+                zones.append(g)
+        return name, preset, zones
+
+
+def zone_fields(bank, g):
+    st, en, ls, le = struct.unpack_from("<IIII", bank.d, bank.sho + g[G_SAMPLEID] * 16)
+    pcm = bank.smpl[st * 2:en * 2]
+    # pitch: gen55 = root*100+cents on every zone; gen58 root override
+    root_cents = g.get(G_PITCH, 6000)
+    if G_ROOT in g and 0 <= g[G_ROOT] <= 127:
+        root_cents = g[G_ROOT] * 100
+    tune = g.get(G_COARSE, 0) * 100 + g.get(G_FINE, 0)
+    rate = int(round(BASE_RATE * 2.0 ** (((6000 - root_cents) + tune) / 1200.0)))
+    kr = g.get(G_KEYRANGE, 0x7F00)
+    keylo, keyhi = kr & 0xFF, kr >> 8
+    sm = g.get(G_MODES, 0) & 3
+    looping = sm in (1, 3)
+    lstart = max(0, min(ls - st, en - st)) if looping else 0
+    lend = max(0, min(le - st, en - st)) if looping else 0
+    if looping and lend <= lstart:               # degenerate loop -> whole buffer
+        lstart, lend = 0, en - st
+    # SBK attenuation: INVERTED (127 = full volume), 0.375 dB/step [T3 exact curve]
+    atten = g.get(G_ATTEN, 127)
+    gain = 10.0 ** (-((127 - atten) * 0.375) / 20.0) if atten < 127 else 1.0
+    rel_tc = g.get(G_RELEASE, None)
+    release = min(8.0, 2.0 ** (rel_tc / 1200.0)) if rel_tc is not None else 0.0
+    pan = g.get(G_PAN, 64)
+    chan = "CHANNEL_LEFT" if pan <= 42 else ("CHANNEL_RIGHT" if pan >= 85 else "CHANNEL_CENTER")
+    # (AUDIO_FIDELITY F14) the authored static resonant low-pass the EMU8000
+    # applied in hardware: initialFilterFc(8) / initialFilterQ(9), SBK 0..127
+    # scale.  Absent fc = filter fully open.
+    filter_fc = g.get(G_FILTER_FC, 127)
+    filter_q  = g.get(G_FILTER_Q, 0)
+    return dict(pcm=pcm, rate=rate, keylo=keylo, keyhi=keyhi, looping=looping,
+                lstart=lstart, lend=lend, gain=gain, release=release, chan=chan,
+                sid=g[G_SAMPLEID], root_cents=root_cents, tune=tune,
+                fc=filter_fc, q=filter_q)
+
+
+def bake_lowpass(pcm, rate, fc127, q127):
+    """(AUDIO_FIDELITY F14) bake the zone's authored static resonant low-pass
+    into the PCM.  Cutoff uses the AWE NRPN curve (100 + fc*7900/127 Hz);
+    resonance maps SBK Q 0..127 -> 0..+12 dB biquad peak [T3 -- curve shape
+    approximate, off/open endpoints exact].  The filter is designed at the
+    zone's BAKED rate, so note-60 playback (1 file second == 1 real second)
+    reproduces the hardware's absolute cutoff exactly; pitch-shifted notes
+    carry the filter with them (same limitation as the rate-baked tuning)."""
+    cutoff_hz = 100.0 + fc127 * 7900.0 / 127.0
+    if cutoff_hz >= 0.45 * rate:                  # at/above Nyquist headroom: no-op
+        return None
+    q_biquad = 0.7071 * 10.0 ** ((q127 / 127.0 * 12.0) / 20.0)
+    # RBJ cookbook 2-pole low-pass, run in FLOAT (the caller converts once)
+    w0 = 2.0 * math.pi * cutoff_hz / rate
+    alpha = math.sin(w0) / (2.0 * q_biquad)
+    cw = math.cos(w0)
+    b0 = (1.0 - cw) / 2.0
+    b1 = 1.0 - cw
+    b2 = (1.0 - cw) / 2.0
+    a0 = 1.0 + alpha
+    a1 = -2.0 * cw
+    a2 = 1.0 - alpha
+    b0 /= a0; b1 /= a0; b2 /= a0; a1 /= a0; a2 /= a0
+    n = len(pcm) // 2
+    vals = struct.unpack("<%dh" % n, pcm[:n * 2])
+    out = [0.0] * n
+    x1 = x2 = y1 = y2 = 0.0
+    for i, x0 in enumerate(vals):
+        y0 = b0 * x0 + b1 * x1 + b2 * x2 - a1 * y1 - a2 * y2
+        x2 = x1; x1 = x0
+        y2 = y1; y1 = y0
+        out[i] = y0
+    return out
+
+
+def write_wav(fname, pcm, rate, gain, fc127=127, q127=0):
+    # Full bake pipeline in FLOAT, one int16 conversion at the end: the
+    # resonance peak can overshoot full scale (165 of 232 filtered zones
+    # hard-clipped in an int-per-stage draft) -- normalize the whole file
+    # down to fit instead of clipping (level error <= the overshoot, wave
+    # shape preserved; the EMU's filter stage had internal headroom).
+    fvals = None
+    if fc127 < 127:                               # authored static low-pass
+        fvals = bake_lowpass(pcm, rate, fc127, q127)
+    if fvals is None and gain < 0.999:
+        n = len(pcm) // 2
+        fvals = [float(v) for v in struct.unpack("<%dh" % n, pcm[:n * 2])]
+    if fvals is not None:
+        if gain < 0.999:                          # layer-balance attenuation
+            fvals = [v * gain for v in fvals]
+        peak = max(1.0, max(abs(v) for v in fvals))
+        norm = (32767.0 / peak) if peak > 32767.0 else 1.0
+        pcm = struct.pack("<%dh" % len(fvals),
+                          *[int(v * norm) for v in fvals])
+    with wave.open(os.path.join(AUDIO, fname), "wb") as w:
+        w.setnchannels(1); w.setsampwidth(2); w.setframerate(rate)
+        w.writeframes(pcm)
+
+
+def main():
+    stats = "--stats" in sys.argv
+    banks = {1: "AUDIO1.RES", 2: "AUDIO2.RES"}
+    table = {1: {}, 2: {}}
+    grid_outliers = []
+    total_zones = 0
+    for bn, fn in banks.items():
+        bank = Bank(os.path.join(AUDIO, fn))
+        multi = 0
+        for i in range(bank.nphdr):
+            name, preset, zones = bank.preset_zones(i)
+            if not name or not zones:
+                continue
+            zs = []
+            for g in zones[:MAX_ZONES]:
+                z = zone_fields(bank, g)
+                if not z["pcm"]:
+                    continue
+                zs.append(z)
+            if len(zones) > MAX_ZONES:
+                print(f"WARNING: {name} has {len(zones)} zones, capped at {MAX_ZONES}")
+            if not zs:
+                continue
+            for k, z in enumerate(zs):
+                z["file"] = f"{name}.wav" if len(zs) == 1 else f"{name}_z{k}.wav"
+                write_wav(z["file"], z["pcm"], z["rate"], z["gain"], z["fc"], z["q"])
+                cents = 1200.0 * math.log2(z["rate"] / 44100.0)
+                if abs(cents - round(cents / 100.0) * 100) > 3 and not z["tune"] % 100:
+                    grid_outliers.append((name, k, z["rate"], round(cents, 1)))
+            table[bn][preset] = (name, zs)
+            total_zones += len(zs)
+            if len(zs) > 1:
+                multi += 1
+        print(f"bank {bn} ({fn}): {len(table[bn])} presets, {multi} multi-zone")
+    print(f"total zones: {total_zones}")
+    if grid_outliers:
+        print(f"rate-grid outliers (expect few): {len(grid_outliers)}")
+        for o in grid_outliers[:10]:
+            print("   ", o)
+
+    if stats:
+        for bn in (1, 2):
+            for preset, (name, zs) in sorted(table[bn].items()):
+                if len(zs) > 1:
+                    print(f"b{bn} p{preset} {name}: " + " ".join(
+                        f"[{z['keylo']}-{z['keyhi']} r{z['rate']} {'L' if z['looping'] else '1'}"
+                        f"{' rel%.1f' % z['release'] if z['release'] else ''}]" for z in zs))
+        return
+
+    with open(OUT_CPP, "w", newline="\n") as f:
+        f.write('// GENERATED by tools/sf2extract.py -- the audio soundbank table.\n')
+        f.write('// FULL-ZONE extraction (AUDIO_FIDELITY.md F1/F2/F13/F14): every preset\n')
+        f.write('// carries ALL its instrument zones (key-splits, layers, stereo pairs)\n')
+        f.write('// with per-zone key range, loop region (frames), release seconds and\n')
+        f.write('// channel; per-zone tuning + attenuation are baked into the WAVs.\n')
+        f.write('// Regenerate: python tools/sf2extract.py\n')
+        f.write('#include <L4AUDLVL.hpp>\n\n')
+        f.write('PRESETINFO allPresets[2][128] = {};\n\n')
+        f.write('namespace {\n')
+        f.write('void Z(int b, int p, const char *file, int keyLo, int keyHi, SampleLoop loop,\n')
+        f.write('       int loopStart, int loopEnd, float releaseSec, SampleChannel chan)\n')
+        f.write('{\n')
+        f.write('\tPRESETINFO &pi = allPresets[b][p];\n')
+        f.write('\tif (pi.sampleNum >= MAX_PRESET_SAMPLES) return;\n')
+        f.write('\tSAMPLEINFO &s = pi.samples[pi.sampleNum++];\n')
+        f.write('\ts.implemented = true; s.bufferIndex = -1; s.file = file;\n')
+        f.write('\ts.keyLo = keyLo; s.keyHi = keyHi; s.loop = loop;\n')
+        f.write('\ts.loopStart = loopStart; s.loopEnd = loopEnd;\n')
+        f.write('\ts.releaseSec = releaseSec; s.chan = chan;\n')
+        f.write('}\n\n')
+        f.write('struct AudioPresetInit {\n\tAudioPresetInit() {\n')
+        for bn in (1, 2):
+            for preset, (name, zs) in sorted(table[bn].items()):
+                for z in zs:
+                    loop = "LoopAtWill" if z["looping"] else "ForceStatic"
+                    f.write(f'\t\tZ({bn-1},{preset},"{z["file"]}",{z["keylo"]},{z["keyhi"]},'
+                            f'{loop},{z["lstart"]},{z["lend"]},{z["release"]:.3f}f,{z["chan"]});\n')
+        f.write('\t}\n} s_audioPresetInit;\n}\n')
+    npresets = len(table[1]) + len(table[2])
+    print(f"wrote {OUT_CPP} ({npresets} presets, {total_zones} zones)")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tools/soundboard.py b/tools/soundboard.py
new file mode 100644
index 0000000..03d8c7d
--- /dev/null
+++ b/tools/soundboard.py
@@ -0,0 +1,120 @@
+#!/usr/bin/env python3
+"""soundboard.py -- click-to-play board for the BT soundbank (content/AUDIO/*.wav).
+
+Run:  python tools/soundboard.py          (from the repo root, or anywhere)
+
+- Click a button to play that sample (stdlib winsound, async -- click again to
+  restart, click STOP to silence).
+- The label shows  [bank:patch]  from game/reconstructed/audiopresets.cpp so an
+  identified sound maps straight back to the game's (bankID, patchID).
+- Type in the filter box to narrow (substring, case-insensitive).
+- "Play All" steps through the filtered list one per second (ESC/STOP to halt).
+"""
+import os, re, sys, threading, time
+import tkinter as tk
+from tkinter import ttk
+import winsound
+
+HERE  = os.path.dirname(os.path.abspath(__file__))
+AUDIO = os.path.normpath(os.path.join(HERE, "..", "content", "AUDIO"))
+PRESETS_CPP = os.path.normpath(os.path.join(HERE, "..", "game", "reconstructed", "audiopresets.cpp"))
+
+def load_mapping():
+    """file -> (bank, patch) from audiopresets.cpp (allPresets[b][p] ... file="X.wav")."""
+    mapping = {}
+    try:
+        text = open(PRESETS_CPP, encoding="utf-8", errors="replace").read()
+        # blocks look like: allPresets[0][12].samples[0]; ... s.file = "LaserAFire01.wav";
+        for m in re.finditer(r'allPresets\[(\d+)\]\[(\d+)\]\.samples\[0\];.*?s\.file = "([^"]+)";',
+                             text, re.S):
+            bank, patch, fname = int(m.group(1)) + 1, int(m.group(2)), m.group(3)
+            mapping[fname] = (bank, patch)
+    except OSError:
+        pass
+    return mapping
+
+class SoundBoard(tk.Tk):
+    def __init__(self):
+        super().__init__()
+        self.title("BT411 Soundboard -- " + AUDIO)
+        self.geometry("1150x760")
+        self.mapping = load_mapping()
+        self.files = sorted(f for f in os.listdir(AUDIO) if f.lower().endswith(".wav"))
+        self.playing_all = False
+
+        top = ttk.Frame(self); top.pack(fill="x", padx=6, pady=4)
+        ttk.Label(top, text="Filter:").pack(side="left")
+        self.filter_var = tk.StringVar()
+        ent = ttk.Entry(top, textvariable=self.filter_var, width=32)
+        ent.pack(side="left", padx=4)
+        self.filter_var.trace_add("write", lambda *a: self.rebuild())
+        ttk.Button(top, text="STOP", command=self.stop).pack(side="left", padx=8)
+        ttk.Button(top, text="Play All (filtered)", command=self.play_all).pack(side="left")
+        self.status = tk.StringVar(value=f"{len(self.files)} samples loaded")
+        ttk.Label(top, textvariable=self.status, foreground="#06c").pack(side="left", padx=12)
+
+        # scrollable button grid
+        wrap = ttk.Frame(self); wrap.pack(fill="both", expand=True)
+        self.canvas = tk.Canvas(wrap, highlightthickness=0)
+        sb = ttk.Scrollbar(wrap, orient="vertical", command=self.canvas.yview)
+        self.canvas.configure(yscrollcommand=sb.set)
+        sb.pack(side="right", fill="y"); self.canvas.pack(side="left", fill="both", expand=True)
+        self.grid_frame = ttk.Frame(self.canvas)
+        self.canvas.create_window((0, 0), window=self.grid_frame, anchor="nw")
+        self.grid_frame.bind("<Configure>",
+            lambda e: self.canvas.configure(scrollregion=self.canvas.bbox("all")))
+        self.canvas.bind_all("<MouseWheel>",
+            lambda e: self.canvas.yview_scroll(-1 * (e.delta // 120), "units"))
+        self.bind("<Escape>", lambda e: self.stop())
+
+        self.rebuild()
+
+    def label_for(self, f):
+        bp = self.mapping.get(f)
+        tag = f"[{bp[0]}:{bp[1]}] " if bp else "[-:-] "
+        return tag + f[:-4]
+
+    def rebuild(self):
+        for w in self.grid_frame.winfo_children():
+            w.destroy()
+        flt = self.filter_var.get().lower()
+        shown = [f for f in self.files if flt in f.lower()]
+        cols = 4
+        for i, f in enumerate(shown):
+            b = ttk.Button(self.grid_frame, text=self.label_for(f), width=38,
+                           command=lambda ff=f: self.play(ff))
+            b.grid(row=i // cols, column=i % cols, padx=2, pady=1, sticky="w")
+        self.status.set(f"{len(shown)} shown / {len(self.files)} total")
+        self.canvas.yview_moveto(0)
+
+    def play(self, f):
+        self.playing_all = False
+        path = os.path.join(AUDIO, f)
+        winsound.PlaySound(path, winsound.SND_FILENAME | winsound.SND_ASYNC)
+        bp = self.mapping.get(f)
+        self.status.set(f"PLAYING  {f}" + (f"   (bank {bp[0]}, patch {bp[1]})" if bp else ""))
+
+    def stop(self):
+        self.playing_all = False
+        winsound.PlaySound(None, winsound.SND_PURGE)
+        self.status.set("stopped")
+
+    def play_all(self):
+        flt = self.filter_var.get().lower()
+        shown = [f for f in self.files if flt in f.lower()]
+        self.playing_all = True
+        def run():
+            for f in shown:
+                if not self.playing_all:
+                    return
+                self.after(0, lambda ff=f: self.status.set("PLAYING  " + ff))
+                winsound.PlaySound(os.path.join(AUDIO, f),
+                                   winsound.SND_FILENAME | winsound.SND_ASYNC)
+                time.sleep(1.0)
+            self.playing_all = False
+        threading.Thread(target=run, daemon=True).start()
+
+if __name__ == "__main__":
+    if not os.path.isdir(AUDIO):
+        print("AUDIO dir not found:", AUDIO); sys.exit(1)
+    SoundBoard().mainloop()