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proper lpf mapping + remove redundant worklet params,

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Felix Roos 2025-06-01 21:20:28 +02:00
parent 483843bd0a
commit 5336569c25
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4 changed files with 30 additions and 31 deletions
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19
packages/superdough/dough.mjs
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@ -351,7 +351,7 @@ const defaultDefaultValues = {
let getDefaultValue = (key) => defaultDefaultValues[key];
export class Dough {
init(value) {
init(value, sampleRate) {
// params without defaults:
/*
bank,
@ -424,6 +424,14 @@ export class Dough {
this._sound = new SourceClass();
this._lpf = this.cutoff ? new Lpf() : null;
this._adsr = new ADSR();
this.piOverSr = Math.PI / sampleRate;
this.eighthOverLogHalf = 0.125 / Math.log(0.5);
}
// credits to pulu: https://github.com/felixroos/kabelsalat/issues/35
freq2cutoff(freq) {
const c = 2 * Math.sin(freq * this.piOverSr);
return 1 - Math.log(c) * this.eighthOverLogHalf;
}
update(t) {
if (!this._sound) {
@ -432,14 +440,19 @@ export class Dough {
// sound source
let s = this._sound.update(this.freq);
// lpf
s = this._lpf ? this._lpf.update(s, this.cutoff, this.resonance) : s;
if (this._lpf) {
const cutoff = this.freq2cutoff(this.cutoff);
s = this._lpf ? this._lpf.update(s, cutoff, this.resonance) : s;
}
// not sure if gain is applied here
s = s * this.gain;
// envelope
let gate = Number(t >= this._begin && t <= this._end);
/* Math.random() > 0.99 && console.log('gate', gate); */
const env = this._adsr.update(t, gate, this.attack, this.decay, this.sustain, this.release);
s = s * env;
s = s * this.postgain;
s = s * this.postgain * 0.3;
return s;
}
}