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fix: cut glitches due to envelope release trouble

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This commit is contained in:
Felix Roos 2023-03-15 22:42:03 +01:00
parent 7b529a30f4
commit 8a22c5627a
2 changed files with 12 additions and 7 deletions
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9
packages/webaudio/helpers.mjs
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@ -27,12 +27,15 @@ export const getEnvelope = (attack, decay, sustain, release, velocity, begin) =>
return {
node: gainNode,
stop: (t) => {
gainNode.gain.setValueAtTime(sustain * velocity, t);
if (typeof gainNode.gain.cancelAndHoldAtTime === 'function') {
gainNode.gain.cancelAndHoldAtTime(t);
} else {
// firefox: this will glitch when the sustain has not been reached yet at the time of release
gainNode.gain.setValueAtTime(sustain * velocity, t);
}
gainNode.gain.linearRampToValueAtTime(0, t + release);
},
};
// gainNode.gain.linearRampToValueAtTime(0, end + release); // release
// return gainNode;
};
export const getADSR = (attack, decay, sustain, release, velocity, begin, end) => {

10
packages/webaudio/sampler.mjs
View File

@ -223,9 +223,12 @@ export async function onTriggerSample(t, value, onended, bank) {
}*/
const { node: envelope, stop: releaseEnvelope } = getEnvelope(attack, decay, sustain, release, 1, t);
bufferSource.connect(envelope);
const out = ac.createGain(); // we need a separate gain for the cutgroups because firefox...
envelope.connect(out);
bufferSource.onended = function () {
bufferSource.disconnect();
envelope.disconnect();
out.disconnect();
onended();
};
const stop = (endTime, playWholeBuffer = !clip) => {
@ -236,15 +239,14 @@ export async function onTriggerSample(t, value, onended, bank) {
bufferSource.stop(releaseTime + release);
releaseEnvelope(releaseTime);
};
const handle = { node: envelope, bufferSource, stop };
const handle = { node: out, bufferSource, stop };
// cut groups
// TODO: sometimes, the cutting won't work for very fast triggering...
// it worked before :-/
if (cut !== undefined) {
const prev = cutGroups[cut];
if (prev) {
prev.stop(time, false);
prev.node.gain.setValueAtTime(1, time);
prev.node.gain.linearRampToValueAtTime(0, time + 0.01);
}
cutGroups[cut] = handle;
}