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feedback delay (still hard coded feedback / time values)

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Felix Roos 2025-06-07 10:40:34 +02:00
parent 49f38aeddb
commit 1dac69635d
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1 changed files with 27 additions and 8 deletions
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35
packages/supradough/dough.mjs
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@ -229,7 +229,7 @@ const MAX_DELAY_TIME = 10;
export class Delay {
writeIdx = 0;
readIdx = 0;
buffer = new Float32Array(MAX_DELAY_TIME * SAMPLE_RATE); // .fill(0)
buffer = new Float32Array(MAX_DELAY_TIME * SAMPLE_RATE); //.fill(0)
write(s, delayTime) {
this.writeIdx = (this.writeIdx + 1) % this.buffer.length;
this.buffer[this.writeIdx] = s;
@ -479,19 +479,13 @@ export class DoughVoice {
this.density = this.density ?? getDefaultValue('density');
this.fanchor = this.fanchor ?? getDefaultValue('fanchor');
this.drive = this.drive ?? 0.69;
this.resonance = this.resonance ?? getDefaultValue('resonance');
this.hresonance = this.hresonance ?? getDefaultValue('hresonance');
this.bandq = this.bandq ?? getDefaultValue('bandq');
this.phaserdepth = this.phaserdepth ?? getDefaultValue('phaserdepth');
this.shapevol = this.shapevol ?? getDefaultValue('shapevol');
this.distortvol = this.distortvol ?? getDefaultValue('distortvol');
this.delay = this.delay ?? getDefaultValue('delay');
this.delayfeedback = this.delayfeedback ?? getDefaultValue('delayfeedback');
this.delaytime = this.delaytime ?? getDefaultValue('delaytime');
this.orbit = this.orbit ?? getDefaultValue('orbit');
this.i = this.i ?? getDefaultValue('i');
this.fft = this.fft ?? getDefaultValue('fft');
this.pan = this.pan ?? getDefaultValue('pan');
this.orbit = this.orbit ?? getDefaultValue('orbit');
[this.attack, this.decay, this.sustain, this.release] = getADSRValues([
this.attack,
@ -508,6 +502,7 @@ export class DoughVoice {
// filter setup
this._lpf = this.cutoff ? new TwoPoleFilter() : null;
this.resonance = this.resonance ?? getDefaultValue('resonance');
if (this.lpenv) {
this._lpenv = new ADSR();
[this.lpattack, this.lpdecay, this.lpsustain, this.lprelease] = getADSRValues([
@ -519,6 +514,7 @@ export class DoughVoice {
}
this._hpf = this.hcutoff ? new TwoPoleFilter() : null;
this.hresonance = this.hresonance ?? getDefaultValue('hresonance');
if (this.hpenv) {
this._hpenv = new ADSR();
[this.hpattack, this.hpdecay, this.hpsustain, this.hprelease] = getADSRValues([
@ -529,6 +525,7 @@ export class DoughVoice {
]);
}
this._bpf = this.bandf ? new TwoPoleFilter() : null;
this.bandq = this.bandq ?? getDefaultValue('bandq');
if (this.bpenv) {
this._bpenv = new ADSR();
[this.bpattack, this.bpdecay, this.bpsustain, this.bprelease] = getADSRValues([
@ -547,6 +544,12 @@ export class DoughVoice {
this._crush = this.crush ? new Crush() : null;
this._distort = this.distort ? new Distort() : null;
// delay
this.delay = this.delay ?? getDefaultValue('delay');
this.delayfeedback = this.delayfeedback ?? getDefaultValue('delayfeedback');
this.delaytime = this.delaytime ?? getDefaultValue('delaytime');
// precalculated values
this.piOverSr = Math.PI / value.sampleRate;
this.eighthOverLogHalf = 0.125 / Math.log(0.5);
}
@ -631,12 +634,17 @@ export class Dough {
vid = 0;
q = [];
channels = [0, 0];
delaysend = [0, 0];
delaytime = getDefaultValue('delaytime');
delayfeedback = getDefaultValue('delayfeedback');
t = 0;
// sampleRate: number, currentTime: number (seconds)
constructor(sampleRate = 48000, currentTime = 0) {
this.sampleRate = sampleRate;
this.t = Math.floor(currentTime * sampleRate); // samples
// console.log('init dough', this.sampleRate, this.t);
this._delayL = new Delay();
this._delayR = new Delay();
}
scheduleSpawn(value) {
if (value._begin === undefined) {
@ -696,7 +704,18 @@ export class Dough {
this.voices[v].update(this.t / this.sampleRate);
this.channels[0] += this.voices[v].l;
this.channels[1] += this.voices[v].r;
if (this.voices[v].delay) {
this.delaysend[0] += this.voices[v].l * this.voices[v].delay;
this.delaysend[1] += this.voices[v].r * this.voices[v].delay;
}
}
// todo: how to change delaytime / delayfeedback from a voice?
const delayL = this._delayL.update(this.delaysend[0], this.delaytime);
const delayR = this._delayR.update(this.delaysend[1], this.delaytime);
this.delaysend[0] = delayL * this.delayfeedback;
this.delaysend[1] = delayR * this.delayfeedback;
this.channels[0] += delayL;
this.channels[1] += delayR;
this.t++;
}
}