The createOscillator() method of the BaseAudioContext interface creates an OscillatorNode, a source representing a periodic waveform. It basically generates a constant tone.
Syntax
var audioCtx = new AudioContext(); var oscillator = audioCtx.createOscillator();
Returns
An OscillatorNode.
Example
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.
// create web audio api context
var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
// create Oscillator node
var oscillator = audioCtx.createOscillator();
oscillator.type = 'square';
oscillator.frequency.value = 3000; // value in hertz
oscillator.connect(audioCtx.destination);
oscillator.start();
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Audio API The definition of 'createOscillator' in that specification. |
Working Draft |
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 10.0webkit | (Yes) | 25.0 (25.0) | No support | 15.0webkit 22 (unprefixed) |
6.0webkit |
| Feature | Android | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | 26.0 | 1.2 | ? | ? | ? | 33.0 |