AudioContext.createOscillator()

The createOscillator() method of the AudioContext 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.start();

Specifications

Specification Status Comment
Web Audio API
The definition of 'createOscillator' in that specification.
Working Draft  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 10.0webkit 25.0 (25.0)  Not supported 15.0webkit
22 (unprefixed)
6.0webkit
Feature Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support ? 26.0 1.2 ? ? ? 33.0

See also

Document Tags and Contributors

Contributors to this page: teoli, anirudh_venkatesh, chrisdavidmills
Last updated by: teoli,