mirror of
https://github.com/Tonejs/Tone.js
synced 2024-12-27 12:03:12 +00:00
100 lines
2.8 KiB
TypeScript
100 lines
2.8 KiB
TypeScript
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import { AmplitudeEnvelope } from "../component/envelope/AmplitudeEnvelope";
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import { NormalRange, Time } from "../core/type/Units";
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import { deepMerge, optionsFromArguments } from "../core/util/Defaults";
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import { RecursivePartial } from "../core/util/Interface";
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import { Noise, NoiseType } from "../source/Noise";
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import { Instrument } from "./Instrument";
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import { Synth, SynthOptions } from "./Synth";
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interface NoiseSynthOptions extends SynthOptions {
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noise: {
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type: NoiseType,
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};
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}
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/**
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* Tone.NoiseSynth is composed of a noise generator (Tone.Noise), one filter (Tone.Filter),
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* and two envelopes (Tone.Envelop). One envelope controls the amplitude
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* of the noise and the other is controls the cutoff frequency of the filter.
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* <img src="https://docs.google.com/drawings/d/1rqzuX9rBlhT50MRvD2TKml9bnZhcZmzXF1rf_o7vdnE/pub?w=918&h=242">
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*
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* @example
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* var noiseSynth = new Tone.NoiseSynth().toMaster();
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* noiseSynth.triggerAttackRelease("8n");
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*/
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export class NoiseSynth extends Instrument<NoiseSynthOptions> {
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readonly name = "NoiseSynth";
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// The noise source.
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readonly noise: Noise;
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// The amplitude envelope.
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readonly envelope: AmplitudeEnvelope;
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constructor(options?: RecursivePartial<NoiseSynthOptions>)
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constructor() {
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super(optionsFromArguments(NoiseSynth.getDefaults(), arguments));
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const options = optionsFromArguments(NoiseSynth.getDefaults(), arguments);
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this.noise = new Noise(options.noise);
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this.envelope = new AmplitudeEnvelope(options.envelope);
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// connect the noise to the output
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this.noise.chain(this.envelope, this.output);
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}
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static getDefaults(): NoiseSynthOptions {
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return {
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...deepMerge(Synth.getDefaults(), {
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envelope: {
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attack : 0.005,
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decay : 0.1,
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sustain : 0.0,
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},
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}),
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noise : {
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type : "white",
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},
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};
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}
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triggerAttack(time: Time, velocity: NormalRange = 1): this {
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time = this.toSeconds(time);
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this.envelope.triggerAttack(time, velocity);
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this.noise.start(time);
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if (this.envelope.sustain === 0) {
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this.noise.stop(time + this.toSeconds(this.envelope.attack) + this.toSeconds(this.envelope.decay))
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}
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return this;
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}
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triggerRelease(time: Time): this {
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time = this.toSeconds(time);
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this.envelope.triggerRelease(time);
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this.noise.stop(time + this.toSeconds(this.envelope.release));
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return this;
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}
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sync(): this {
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this._syncMethod("triggerAttack", 0);
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this._syncMethod("triggerRelease", 0);
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return this;
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}
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triggerAttackRelease(duration: Time, time: Time, velocity: NormalRange = 1): this {
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time = this.toSeconds(time);
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duration = this.toSeconds(duration);
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this.triggerAttack(time, velocity);
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this.triggerRelease(time + duration);
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return this;
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}
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dispose(): this {
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super.dispose();
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this.noise.dispose();
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this.envelope.dispose();
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return this;
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}
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}
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