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Add noise parameter for base oscillators

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This commit is contained in:
Raphael Forment 2023-09-30 14:39:44 +02:00
parent c2481e460b
commit 389c7be264
1 changed files with 31 additions and 1 deletions
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32
packages/superdough/synth.mjs
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@ -45,6 +45,7 @@ export function registerSynthSounds() {
fmwave: fmWaveform = 'sine',
vib = 0,
vibmod = 0.5,
noise = 0,
} = value;
let { n, note, freq } = value;
// with synths, n and note are the same thing
@ -65,6 +66,7 @@ export function registerSynthSounds() {
vib,
vibmod,
partials: n,
noise: noise,
});
// FM + FM envelope
let stopFm, fmEnvelope;
@ -188,8 +190,9 @@ export function getNoiseOscillator({ t, ac, type = 'white' }) {
};
}
export function getOscillator({ s, freq, t, vib, vibmod, partials }) {
export function getOscillator({ s, freq, t, vib, vibmod, partials, noise }) {
// Make oscillator with partial count
let ac = getAudioContext();
let o;
if (['pink', 'white', 'brown'].includes(s)) {
@ -221,6 +224,33 @@ export function getOscillator({ s, freq, t, vib, vibmod, partials }) {
vibrato_oscillator.start(t);
}
if (noise > 0) {
// Two gain nodes to set the oscillators to their respective levels
let o_gain = ac.createGain();
let n_gain = ac.createGain();
o_gain.gain.setValueAtTime(1 - noise, ac.currentTime);
n_gain.gain.setValueAtTime(noise, ac.currentTime);
// Instanciating a mixer to blend sources together
let mix_gain = ac.createGain();
// Connecting the main oscillator to the gain node
o.connect(o_gain).connect(mix_gain);
// Instanciating a noise oscillator and connecting
const noiseOscillator = getNoiseOscillator({ t: t, ac: ac, type: 'pink' });
noiseOscillator.node.connect(n_gain).connect(mix_gain);
return {
node: mix_gain,
stop: (time) => {
vibrato_oscillator?.stop(time);
o.stop(time);
noiseOscillator.stop(time);
}
}
}
return {
node: o,
stop: (time) => {