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crush (might be wrong)

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Felix Roos 2025-06-06 08:27:47 +02:00
parent 87598e10d1
commit 0cc18a6468
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1 changed files with 13 additions and 0 deletions
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packages/superdough/dough.mjs
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@ -305,6 +305,15 @@ export class Coarse {
}
}
// amplitude bit crusher
export class Crush {
update(input, crush) {
crush = Math.max(1, crush);
const x = Math.pow(2, crush - 1);
return Math.round(input * x) / x;
}
}
export function _rangex(sig, min, max) {
let logmin = Math.log(min);
let range = Math.log(max) - logmin;
@ -471,6 +480,7 @@ export class DoughVoice {
this._lpf = this.cutoff ? new Lpf() : null;
this._adsr = new ADSR();
this._coarse = this.coarse ? new Coarse() : null;
this._crush = this.crush ? new Crush() : null;
this.piOverSr = Math.PI / value.sampleRate;
this.eighthOverLogHalf = 0.125 / Math.log(0.5);
@ -494,6 +504,9 @@ export class DoughVoice {
if (this._coarse) {
s = this._coarse.update(s, this.coarse);
}
if (this._crush) {
s = this._crush.update(s, this.crush);
}
// not sure if gain is applied here
s = s * this.gain;
// envelope