57 lines
1.4 KiB
JavaScript
57 lines
1.4 KiB
JavaScript
class Synth {
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constructor(audioContext, waveType = "sine", frequency = 400) {
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this.audioContext = audioContext;
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this.oscWaveType = waveType;
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this.oscFrequency = frequency;
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this.isPlaying = false;
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// osc setup
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this.osc = this.audioContext.createOscillator();
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this.osc.type = this.oscWaveType;
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this.osc.frequency.setValueAtTime(this.oscFrequency, this.audioContext.currentTime);
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this.osc.connect(this.audioContext.destination);
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}
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setOscWaveType(type) {
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this.oscWaveType = type;
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this.osc.type = this.oscWaveType;
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}
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startOsc() {
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this.osc.start();
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this.isPlaying = true;
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}
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stopOsc() {
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// first get all the parameters for this osc
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let currentFreq = this.osc.frequency.value;
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let currentType = this.osc.type;
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this.osc.stop();
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this.osc = this.audioContext.createOscillator();
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console.log(this.osc);
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this.osc.type = currentType;
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this.osc.frequency.setValueAtTime(currentFreq, this.audioContext.currentTime);
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this.osc.connect(this.audioContext.destination);
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this.isPlaying = false;
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}
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toggleOsc() {
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if (this.isPlaying === false) {
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this.startOsc();
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} else {
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this.stopOsc();
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}
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}
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}
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let globalAudioContext = new AudioContext();
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let synth = new Synth(globalAudioContext);
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window.onload = function() {
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console.log("hello world!");
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console.log(synth);
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}
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