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buffers can now be repitched (still with aliasing)

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Felix Roos 2025-06-08 14:43:23 +02:00
parent 356d4360ec
commit 55aef18851
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3 changed files with 21 additions and 17 deletions
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6
packages/supradough/dough-worklet.mjs
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@ -10,10 +10,10 @@ class DoughProcessor extends AudioWorkletProcessor {
if (event.data.spawn) {
this.dough.scheduleSpawn(event.data.spawn);
} else if (event.data.sample) {
this.dough.loadSample(event.data.sample, event.data.channels);
this.dough.loadSample(event.data.sample, event.data.channels, event.data.sampleRate);
} else if (event.data.samples) {
event.data.samples.forEach(([name, channels]) => {
this.dough.loadSample(name, channels);
event.data.samples.forEach(([name, channels, sampleRate]) => {
this.dough.loadSample(name, channels, sampleRate);
});
} else {
console.log('unrecognized event type', event.data);

22
packages/supradough/dough.mjs
View file

@ -385,14 +385,16 @@ export class Distort {
export class BufferPlayer {
static samples = new Map();
channels = [];
buffer; // { channels: Float32Array, sampleRate: number }
pos = 0;
sampleFreq = 261.626; // middle c
update(freq, channel = 0) {
if (this.pos >= this.channels[channel].length) {
if (this.pos >= this.buffer.channels[channel].length) {
return 0;
}
let s = this.channels[channel][this.pos];
this.pos++;
const speed = ((freq / this.sampleFreq) * this.buffer.sampleRate) / SAMPLE_RATE;
let s = this.buffer.channels[channel][Math.floor(this.pos)];
this.pos = this.pos + speed;
return s;
}
}
@ -576,7 +578,8 @@ export class DoughVoice {
this._sound = new SourceClass();
} else if (BufferPlayer.samples.has(this.s)) {
this._sample = new BufferPlayer();
this._sample.channels = BufferPlayer.samples.get(this.s);
const buffer = BufferPlayer.samples.get(this.s);
this._sample.buffer = buffer;
} else {
console.warn('sound not found', this.s);
}
@ -738,7 +741,10 @@ export class DoughVoice {
const env = this._adsr.update(t, gate, this.attack, this.decay, this.sustain, this.release);
s = s * env;
s = s * this.postgain * 0.2;
s = s * this.postgain;
if (!this._sample) {
s = s * 0.2; // turn down waveforms
}
if (this.pan === 0.5) {
this.l = this.r = s; // mono
@ -770,8 +776,8 @@ export class Dough {
this._delayL = new Delay();
this._delayR = new Delay();
}
loadSample(name, channels) {
BufferPlayer.samples.set(name, channels);
loadSample(name, channels, sampleRate) {
BufferPlayer.samples.set(name, { channels, sampleRate });
}
scheduleSpawn(value) {
if (value._begin === undefined) {