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Square instead of self-multiply; more voices; more cleanup

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This commit is contained in:
Aria
2025-11-12 13:56:14 -06:00
parent 157b05536a
commit 2875814a36
1 changed files with 9 additions and 13 deletions
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packages/superdough/worklets.mjs
+9 -13
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@@ -24,7 +24,7 @@ const fceil = (x) => ffloor(x + 1);
const ffrac = (x) => x - ffloor(x);
const fast_tanh = (x) => {
const x2 = x * x;
const x2 = x ** 2;
return (x * (27.0 + x2)) / (27.0 + 9.0 * x2);
};
@@ -50,17 +50,13 @@ function polyBlep(phase, dt) {
// Start of cycle
if (phase < dt) {
phase *= invdt;
// 2 * (phase - phase^2/2 - 0.5)
return phase + phase - phase * phase - 1;
return 2 * phase - phase ** 2 - 1;
}
// End of cycle
else if (phase > 1 - dt) {
phase = (phase - 1) * invdt;
// 2 * (phase^2/2 + phase + 0.5)
return phase * phase + phase + phase + 1;
return phase ** 2 + 2 * phase + 1;
}
// 0 otherwise
else {
return 0;
@@ -520,7 +516,7 @@ class SuperSawOscillatorProcessor extends AudioWorkletProcessor {
return false;
}
const output = outputs[0];
const voices = pv(params.voices, 0); // k-rate
const voices = params.voices[0]; // k-rate
for (let i = 0; i < output[0].length; i++) {
const detune = pv(params.detune, i);
const freqspread = pv(params.freqspread, i);
@@ -641,7 +637,7 @@ class PhaseVocoderProcessor extends OLAProcessor {
const real = this.freqComplexBuffer[j];
const imag = this.freqComplexBuffer[j + 1];
// no need to sqrt for peak finding
this.magnitudes[i] = real * real + imag * imag;
this.magnitudes[i] = real ** 2 + imag ** 2;
i += 1;
j += 2;
}
@@ -1033,7 +1029,7 @@ class WavetableOscillatorProcessor extends AudioWorkletProcessor {
{ name: 'position', defaultValue: 0, min: 0, max: 1 },
{ name: 'warp', defaultValue: 0, min: 0, max: 1 },
{ name: 'warpMode', defaultValue: 0 },
{ name: 'voices', defaultValue: 1, min: 1 },
{ name: 'voices', defaultValue: 1, min: 1, automationRate: 'k-rate' },
{ name: 'panspread', defaultValue: 0.7, min: 0, max: 1 },
{ name: 'phaserand', defaultValue: 0, min: 0, max: 1 },
];
@@ -1106,7 +1102,7 @@ class WavetableOscillatorProcessor extends AudioWorkletProcessor {
return amt < 0.5 ? this._warpPhase(phase, 1 - 2 * amt, 3) : this._warpPhase(phase, 2 * amt - 1, 2);
}
case WarpMode.SYNC: {
const syncRatio = Math.pow(16, amt * amt);
const syncRatio = Math.pow(16, amt ** 2);
return (phase * syncRatio) % 1;
}
case WarpMode.QUANT: {
@@ -1142,7 +1138,7 @@ class WavetableOscillatorProcessor extends AudioWorkletProcessor {
const isPrime = (n) => {
if (n < 2) return false;
if (n % 2 === 0) return n === 2;
for (let d = 3; d * d <= n; d += 2) if (n % d === 0) return false;
for (let d = 3; d ** 2 <= n; d += 2) if (n % d === 0) return false;
return true;
};
let { n } = this._toBits(amt, 3);
@@ -1239,6 +1235,7 @@ class WavetableOscillatorProcessor extends AudioWorkletProcessor {
if (outR !== outL) outR.set(outL);
return true;
}
const voices = parameters.voices[0]; // k-rate
for (let i = 0; i < outL.length; i++) {
const detune = pv(parameters.detune, i);
const freqspread = pv(parameters.freqspread, i);
@@ -1248,7 +1245,6 @@ class WavetableOscillatorProcessor extends AudioWorkletProcessor {
const frac = idx - fIdx;
const warpAmount = clamp(pv(parameters.warp, i), 0, 1);
const warpMode = pv(parameters.warpMode, i);
const voices = pv(parameters.voices, i);
const phaseRand = clamp(pv(parameters.phaserand, i), 0, 1);
const panspread = voices > 1 ? clamp(pv(parameters.panspread, i), 0, 1) : 0;
const gain1 = Math.sqrt(0.5 - 0.5 * panspread);