The createOscillator() method of the BaseAudioContext interface creates an OscillatorNode, a source representing a periodic waveform. It basically generates a constant tone.
Note: The OscillatorNode() constructor is the recommended way to create a OscillatorNode; see Creating an AudioNode.
js
createOscillator()
None.
An OscillatorNode.
The following example shows basic usage of an AudioContext to create an oscillator node. For applied examples/information, check out our Violent Theremin demo (see app.js for relevant code); also see our OscillatorNode page for more information.
js
// create web audio api context
const audioCtx = new AudioContext();
// create Oscillator node
const oscillator = audioCtx.createOscillator();
oscillator.type = "square";
oscillator.frequency.setValueAtTime(3000, audioCtx.currentTime); // value in hertz
oscillator.connect(audioCtx.destination);
oscillator.start();
| Specification |
|---|
| Web Audio API # dom-baseaudiocontext-createoscillator |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
createOscillator |
20 | 12 | 25 | No | 15 | 6 | 4.4 | 25 | 25 | 14 | 6 | 1.5 |
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https://developer.mozilla.org/en-US/docs/Web/API/BaseAudioContext/createOscillator