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add envelope to soundfonts

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This commit is contained in:
Felix Roos 2023-03-15 23:02:05 +01:00
parent a33ce67dd4
commit f788d347ec
1 changed files with 10 additions and 6 deletions
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16
packages/soundfonts/fontloader.mjs
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@ -1,5 +1,5 @@
import { toMidi } from '@strudel.cycles/core';
import { getAudioContext, registerSound } from '@strudel.cycles/webaudio';
import { getAudioContext, registerSound, getEnvelope } from '@strudel.cycles/webaudio';
import { instruments } from './list.mjs';
let loadCache = {};
@ -122,18 +122,22 @@ export function registerSoundfonts() {
instrument,
async (time, value, onended) => {
const { note, n } = value;
const { attack = 0.001, decay = 0.001, sustain = 1, release = 0.001 } = value;
const ctx = getAudioContext();
const bufferSource = await getFontBufferSource(instrument, note || n, ctx);
bufferSource.start(time);
const stop = (time) => bufferSource.stop(time);
const g = new GainNode(ctx, { gain: 0.3 });
bufferSource.connect(g);
const { node: envelope, stop: releaseEnvelope } = getEnvelope(attack, decay, sustain, release, 0.3, time);
bufferSource.connect(envelope);
const stop = (releaseTime) => {
bufferSource.stop(releaseTime + release);
releaseEnvelope(releaseTime);
};
bufferSource.onended = () => {
bufferSource.disconnect();
g.disconnect();
envelope.disconnect();
onended();
};
return { node: g, stop };
return { node: envelope, stop };
},
{ type: 'soundfont', prebake: true },
);