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instrument: one staged-envelope system — per-segment curves, the sustain-less AHD, and a shared overlay for all three envelopes

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Trigger's fade pair folds into the AHD (and goes live); the release anchors right;
Preserve rings its synthetic tail out instead of cutting it. Payload v10.
This commit is contained in:
Daniel Harvey
2026-07-31 08:37:57 -04:00
parent 87d7ceb066
commit 13e8c5c4d9
51 changed files with 3406 additions and 1812 deletions
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src/core/instrument/engine/voice.cpp
+33 -21
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@@ -64,11 +64,12 @@ void Voice::start(int note, int velocity, const SampleData& sample, bool declick
std::int64_t start = sample.startFrame;
if (start < 0 || start >= frameCount) start = 0;
readPos_ = static_cast<double>(start);
startFrame_ = start; // Trigger fade offset origin (readPos - startFrame = span offset)
startFrame_ = start; // the span-offset origin: readPos - startFrame
// Amplitude envelope: Gate = AHDSR (all five fields read from play.adsr, resolved to
// frames from stored seconds at load time); Trigger = the time-boxed fade-in/out over the
// % play length.
// frames from stored seconds at load time); Trigger = the staged AHD over the % play span.
const std::int64_t postStart = frameCount - start; // >= 1 (start clamped < frameCount)
std::int64_t trigSpan = 0;
if (playMode_ == PlayMode::Gate) {
env_.configure(p.adsr);
env_.noteOn();
@@ -79,17 +80,18 @@ void Voice::start(int note, int velocity, const SampleData& sample, bool declick
double frac = p.trigger.lengthFraction;
if (frac <= 0.0) frac = 0.0; // %=0 -> zero play length (finishes immediately)
if (frac > 1.0) frac = 1.0;
const std::int64_t span = frameCount - start; // >= 1 (start clamped < frameCount)
std::int64_t playLen = static_cast<std::int64_t>(
static_cast<double>(span) * frac + 0.5); // round
static_cast<double>(postStart) * frac + 0.5); // round
if (playLen < 0) playLen = 0;
if (playLen > span) playLen = span;
if (playLen > postStart) playLen = postStart;
playEnd_ = start + playLen;
trigEnv_.configure(playLen, p.trigger.fadeInFrames, p.trigger.fadeOutFrames,
kDefaultFadeCurve);
trigSpan = playLen;
ampAhd_.configure(playLen, p.trigAhd);
}
pitchEnv_.configure(p.pitchEnv);
// The pitch AHD's Hold fraction is taken against the whole playable span, so its three
// stages lay 1:1 over the waveform from the start point.
pitchEnv_.configure(postStart, p.pitchEnv);
pitchEnv_.noteOn();
// A restart lands every live glide back on the new note's own values, at a step derived
@@ -119,8 +121,12 @@ void Voice::start(int note, int velocity, const SampleData& sample, bool declick
rResonance_.set(static_cast<double>(p.filter.settings.resonanceNorm));
rMorph_.set(static_cast<double>(p.filter.settings.morphNorm));
rDrive_.set(static_cast<double>(p.filter.settings.driveNorm));
filterEnv_.configure(p.filter.env);
filterEnv_.noteOn();
if (playMode_ == PlayMode::Gate) {
filterEnv_.configure(p.filter.env);
filterEnv_.noteOn();
} else {
filterAhd_.configure(trigSpan, p.filter.trigEnv);
}
filter_.reset();
updateFilterCutoffBase(note);
// The note's ONE full solve — Q, morph and drive are constants for its lifetime unless
@@ -196,25 +202,31 @@ void Voice::start(int note, int velocity, const SampleData& sample, bool declick
}
void Voice::applyLive(const instrument::engine::LiveValues& live, bool snap) {
// Gate's amplitude envelope is the AHDSR; Trigger's fade shape is anchored to a play span
// resolved at note-on and travels by reload instead (deck_groups.h names why).
// Each envelope applies only the shape its play mode selected at note-on; the block
// carries both so the mode never changes what is published.
//
// A fresh note and a sounding one take DIFFERENT envelope entry points, never one with a
// flag: a voice that has rendered nothing has no phase to hold and nothing to be
// continuous with, and the mid-stage rule misreads its stage-0 position (envelopes.h).
const bool gate = (playMode_ == PlayMode::Gate);
if (snap) {
if (playMode_ == PlayMode::Gate) env_.snapLive(live.adsr);
pitchEnv_.snapLive(live.pitchEnvAttackFrames, live.pitchEnvDecayFrames,
live.pitchEnvPeakSemitones);
if (gate) env_.snapLive(live.adsr);
else ampAhd_.snapLive(live.ampAhd);
pitchEnv_.snapLive(live.pitchEnv);
} else {
if (playMode_ == PlayMode::Gate) env_.applyLive(live.adsr);
pitchEnv_.applyLive(live.pitchEnvAttackFrames, live.pitchEnvDecayFrames,
live.pitchEnvPeakSemitones);
if (gate) env_.applyLive(live.adsr);
else ampAhd_.applyLive(sourceOffset(), live.ampAhd);
pitchEnv_.applyLive(live.pitchEnv);
}
if (!filterOn_) return; // filter enable is a discrete toggle: it travels by reload
if (snap) filterEnv_.snapLive(live.filterEnv);
else filterEnv_.applyLive(live.filterEnv);
if (snap) {
if (gate) filterEnv_.snapLive(live.filterEnv);
else filterAhd_.snapLive(live.filterAhd);
} else {
if (gate) filterEnv_.applyLive(live.filterEnv);
else filterAhd_.applyLive(sourceOffset(), live.filterAhd);
}
filterCutoffNorm_ = static_cast<double>(live.filterSettings.cutoffNorm);
filterKeyTrack_ = live.filterKeyTrack;
filterSettings_.morphLaw = live.filterSettings.morphLaw;