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Merge branch 'main' into phasermodulation

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Jade (Rose) Rowland 2024-05-24 17:30:09 -04:00 • committed by GitHub
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18 changed files with 382 additions and 7160 deletions
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71
packages/superdough/worklets.mjs
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@ -238,6 +238,77 @@ class ShapeProcessor extends AudioWorkletProcessor {
}
registerProcessor('shape-processor', ShapeProcessor);
function fast_tanh(x) {
const x2 = x * x;
return (x * (27.0 + x2)) / (27.0 + 9.0 * x2);
}
const _PI = 3.14159265359;
//adapted from https://github.com/TheBouteillacBear/webaudioworklet-wasm?tab=MIT-1-ov-file
class LadderProcessor extends AudioWorkletProcessor {
static get parameterDescriptors() {
return [
{ name: 'frequency', defaultValue: 500 },
{ name: 'q', defaultValue: 1 },
{ name: 'drive', defaultValue: 0.69 },
];
}
constructor() {
super();
this.started = false;
this.p0 = [0, 0];
this.p1 = [0, 0];
this.p2 = [0, 0];
this.p3 = [0, 0];
this.p32 = [0, 0];
this.p33 = [0, 0];
this.p34 = [0, 0];
}
process(inputs, outputs, parameters) {
const input = inputs[0];
const output = outputs[0];
const hasInput = !(input[0] === undefined);
if (this.started && !hasInput) {
return false;
}
this.started = hasInput;
const resonance = parameters.q[0];
const drive = clamp(Math.exp(parameters.drive[0]), 0.1, 2000);
let cutoff = parameters.frequency[0];
// eslint-disable-next-line no-undef
cutoff = (cutoff * 2 * _PI) / sampleRate;
cutoff = cutoff > 1 ? 1 : cutoff;
const k = Math.min(8, resonance * 0.4);
// drive makeup * resonance volume loss makeup
let makeupgain = (1 / drive) * Math.min(1.75, 1 + k);
for (let n = 0; n < blockSize; n++) {
for (let i = 0; i < input.length; i++) {
const out = this.p3[i] * 0.360891 + this.p32[i] * 0.41729 + this.p33[i] * 0.177896 + this.p34[i] * 0.0439725;
this.p34[i] = this.p33[i];
this.p33[i] = this.p32[i];
this.p32[i] = this.p3[i];
this.p0[i] += (fast_tanh(input[i][n] * drive - k * out) - fast_tanh(this.p0[i])) * cutoff;
this.p1[i] += (fast_tanh(this.p0[i]) - fast_tanh(this.p1[i])) * cutoff;
this.p2[i] += (fast_tanh(this.p1[i]) - fast_tanh(this.p2[i])) * cutoff;
this.p3[i] += (fast_tanh(this.p2[i]) - fast_tanh(this.p3[i])) * cutoff;
output[i][n] = out * makeupgain;
}
}
return true;
}
}
registerProcessor('ladder-processor', LadderProcessor);
class DistortProcessor extends AudioWorkletProcessor {
static get parameterDescriptors() {
return [