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Audio: implement NOTE->PITCH + control pitch -- the AL_PITCH was never applied (task #50)

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The whole pitch system existed but was discarded: NoteAudioHandler captured the
MIDI note, ExecuteModel computed relativePitch from the control-chain cents --
and NOTHING ever called alSourcef(AL_PITCH).  Every sample played at root.

Consequences fixed:
- The load-time 'chirping' ambience: an authored looped sequence (div=120
  tempo=160, note 51 events on bank1:83) plays a rhythmic tick pitched ~9
  semitones DOWN; at root it was a high click ('chirp').  Identified live via
  the new BT_AUDIO_DUMP playing-source tape + user ear-match at cadence.
- Engine now revs: EngineMotor pitch rides the throttle (measured 1.0 -> 1.12).
- All sequence-authored patterns (alarms/klaxons/ambience) regain their pitch.

Implementation: BTNotePitchFactor(note) = 2^((note-60)/12); applied at all 3
patch-source StartImplementations (fresh attach) and all 3 ExecuteModels
(combined with the control-chain relativePitch, clamped 0.5..2.0 as before).
Uses the existing AudioSource::GetCurrentNoteValue().

Also: [seqcfg] sequence-config dump, g_bufferNames + BT_AUDIO_DUMP live tape
(1/s: every playing AL source with sample name/gain/pitch/loop),
tools/soundboard.py updated mapping.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-16 08:20:42 -05:00
co-authored by Claude Opus 4.8
parent e017f257a5
commit 37d4554440
3 changed files with 74 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
engine/MUNGA_L4/L4AUDIO.cpp
+46
View File
@@ -1,3 +1,4 @@
#include <cmath>
#include <cstdlib>
#include "mungal4.h"
#pragma hdrstop
@@ -10,6 +11,18 @@
#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 #########################
//#############################################################################
@@ -924,6 +937,12 @@ void
patch_resource->SetDistance(GetDistanceToSource());
patch_resource->SetupPatch(channelSet);
{ // 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
//
@@ -1034,6 +1053,11 @@ 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);
}
//
//--------------------------------------------------------------------------
@@ -1210,6 +1234,12 @@ void
patch_resource->SetDistance(GetDistanceToSource());
patch_resource->SetupPatch(channelSet);
{ // 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++)
{
@@ -1411,6 +1441,11 @@ void
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)
@@ -1704,6 +1739,12 @@ void
Check(patch_resource);
patch_resource->SetDistance(GetDistanceToSource());
patch_resource->SetupPatch(channelSet);
{ // 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)
@@ -1931,6 +1972,11 @@ 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;