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Gyro tail + audio (task #66): the INSTABILITY MODEL -- mech+0x3F0 reconstructed

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Byte-decoded the un-exported master-perf block @0x4aad3d-0x4aaf14 (capstone;
the same gap that held the F5 footstep code) [T1]:

  instab  = (min(|AccelerationLastFrame| / maxUnstableAcceleration, 1)
             x unstableAccelerationEffect)^2
  instab += clamp((demand - legCycleSpeed)/demand, <=1)      # "gun the engine"
             x unstableGunTheEngineEffect                    # (demand clamped to
                                                             #  [gimpStride(neg), runMax2])
  if (legAnimationState == 4 /*turn-in-place*/) instab += unstableStopedTurnEffect
  clamp to 1  ->  mech+0x3F0  ->  gyro->swayBias (gyro+0x3A8)

Every piece resolves to already-reconstructed structure: the model-record
tuning block rec+0x80..0x94 (ctor copy @0x4a2593 -- the six authored
Unstable* fields, previously parked in the Wword scratch bank, now real
members); AccelerationLastFrame@0x82c = the snapshot of the ring-derived
localAcceleration (copied at the perf tail @0x4ab142); CurrentSpeed@0x348 =
legCycleSpeed; the trn state 4 gate; and the gyro feed lands in the
EXISTING swayBias member + GyroscopeSimulation consumer (task #56) --
GyroFrameJointWrite's "0.0f model TBD" argument is now the live value.

UnstablePercentage (binary id 52 @0x3F0) binds the real member: the LAST
dead audio attribute is live -- the authored instability alarm (start
thresh 0.01 + volume = the fraction) sounds under hard maneuvers, and the
cockpit ambient sway now scales with reckless driving.

Live verification (30s, 0.6-throttle run): instab 0.38 during the walk->run
chase (cyc 22.2 vs demand 33.6), settling to 0.002-0.12 per-stride ripple at
steady run; attribute binds with live float values; [instab] trace under
BT_GYRO_TRACE.  unstableSuperStopEffect/unstableHighVelocityEffect writers
remain unlocated (plausibly the airborne perf variant) -- noted on members.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-16 15:51:10 -05:00
co-authored by Claude Opus 4.8
parent c581553a6c
commit c51d64a6b8
5 changed files with 77 additions and 11 deletions
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docs/AUDIO_FIDELITY.md
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@@ -3,8 +3,9 @@
> **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 partial
> (attenuation baked; static fc/Q deferred); F17 partial (CollisionSpeed +
> ReduceButton real; UnstablePercentage deferred on the gyro sway model);
> (attenuation baked; static fc/Q deferred); 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).
> attrnull = 0: every authored audio attribute binds a real member.