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experiment with passing time to withAudioNode

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This commit is contained in:
Felix Roos 2022-04-17 12:01:13 +02:00
parent f210c4425b
commit 6bba661e24
1 changed files with 16 additions and 11 deletions
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27
packages/webaudio/webaudio.mjs
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@ -1,11 +1,13 @@
import { Pattern, getFrequency } from '@strudel.cycles/core';
import { Tone } from '@strudel.cycles/tone';
let audioContext;
// let audioContext;
export const getAudioContext = () => {
if (!audioContext) {
return Tone.getContext().rawContext;
/* if (!audioContext) {
audioContext = new AudioContext();
}
return audioContext;
return audioContext; */
};
const lookahead = 0.2;
@ -25,24 +27,27 @@ Pattern.prototype.withAudioNode = function (createAudioNode) {
return this._withEvent((event) => {
return event.setContext({
...event.context,
createAudioNode: (e) => createAudioNode(e, event.context.createAudioNode?.(event)),
createAudioNode: (t, e) => createAudioNode(t, e, event.context.createAudioNode?.(t, event)),
});
});
};
Pattern.prototype._wave = function (type) {
return this.withAudioNode((e) => {
return this.withAudioNode((t, e) => {
const osc = getAudioContext().createOscillator();
osc.type = type;
const f = getFrequency(e);
osc.frequency.value = f; // expects frequency..
osc.start(e.whole.begin.valueOf() + lookahead);
osc.stop(e.whole.end.valueOf() + lookahead); // release?
console.log('wave', t, getAudioContext().currentTime);
const begin = t ?? (e.whole.begin.valueOf() + lookahead);
const end = begin + e.duration;
osc.start(begin);
osc.stop(end); // release?
return osc;
});
};
Pattern.prototype.adsr = function (a = 0.01, d = 0.05, s = 1, r = 0.01) {
return this.withAudioNode((e, node) => {
return this.withAudioNode((t, e, node) => {
const velocity = e.context?.velocity || 1;
const envelope = adsr(a, d, s, r, velocity, e.whole.begin.valueOf() + lookahead, e.whole.end.valueOf() + lookahead);
node?.connect(envelope);
@ -50,7 +55,7 @@ Pattern.prototype.adsr = function (a = 0.01, d = 0.05, s = 1, r = 0.01) {
});
};
Pattern.prototype.filter = function (type = 'lowshelf', frequency = 1000, gain = 25) {
return this.withAudioNode((e, node) => {
return this.withAudioNode((t, e, node) => {
const filter = getAudioContext().createBiquadFilter();
filter.type = type;
filter.frequency.value = frequency;
@ -64,13 +69,13 @@ Pattern.prototype.out = function () {
const master = getAudioContext().createGain();
master.gain.value = 0.1;
master.connect(getAudioContext().destination);
return this.withAudioNode((e, node) => {
return this.withAudioNode((t, e, node) => {
if (!node) {
console.warn('out: no source! call .osc() first');
}
node?.connect(master);
})._withEvent((event) => {
const onTrigger = (_, e) => e.context?.createAudioNode?.(e);
const onTrigger = (time, e) => e.context?.createAudioNode?.(time, e);
return event.setContext({ ...event.context, onTrigger });
});
};