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use lerp

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This commit is contained in:
Jade (Rose) Rowland 2024-03-14 20:35:56 -04:00
parent 83145784d7
commit fd946107df
3 changed files with 20 additions and 9 deletions
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2
packages/core/controls.mjs
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@ -890,7 +890,7 @@ export const { lock } = registerControl('lock');
* @param {number | Pattern} amount
* @synonyms det
* @example
* note("d f a a# a d3").fast(2).s("supersaw").detune("<.4 1 3 200>")
* note("d f a a# a d3").fast(2).s("supersaw").detune("<.1 .2 .5 24.1>")
*
*/
export const { detune, det } = registerControl('detune', 'det');

4
packages/superdough/synth.mjs
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@ -64,8 +64,8 @@ export function registerSynthSounds() {
'supersaw',
(begin, value, onended) => {
const ac = getAudioContext();
let { duration, n, unison = 6, spread = 0.3, detune } = value;
detune = detune ?? n ?? 2;
let { duration, n, unison = 5, spread = 0.6, detune } = value;
detune = detune ?? n ?? 0.18;
const frequency = getFrequencyFromValue(value);
const [attack, decay, sustain, release] = getADSRValues(

23
packages/superdough/worklets.mjs
View File

@ -161,10 +161,21 @@ const saw = (phase, dt) => {
return v - polyBlep(phase, dt);
};
function lerp(a, b, n) {
return n * (b - a) + a;
}
function getUnisonDetune(unison, detune, voiceIndex) {
if (unison < 2) {
return 0;
}
return lerp(-detune, detune, voiceIndex / (unison - 1));
}
class SuperSawOscillatorProcessor extends AudioWorkletProcessor {
constructor() {
super();
this.phase = [];
this.logged = 0;
}
static get parameterDescriptors() {
return [
@ -207,7 +218,7 @@ class SuperSawOscillatorProcessor extends AudioWorkletProcessor {
{
name: 'voices',
defaultValue: 6,
defaultValue: 5,
min: 1,
},
];
@ -233,13 +244,13 @@ class SuperSawOscillatorProcessor extends AudioWorkletProcessor {
const gain2 = Math.sqrt(panspread);
for (let n = 0; n < voices; n++) {
let adj = 0;
const isOdd = (n & 1) == 1;
//adjust the detune amount for each voice
if (n > 0) {
adj = isOdd ? n * freqspread : -((n - 1) * freqspread);
if (this.logged < 10) {
this.logged += 1;
}
const freq = Math.min(16744, Math.max(1, frequency + adj * 0.01 * frequency));
//applies unison "spread" detune in semitones
const freq = frequency * Math.pow(2, getUnisonDetune(voices, freqspread, n) / 1.2);
let gainL = gain1;
let gainR = gain2;
// invert right and left gain