The frequency
property of the OscillatorNode
interface is an a-rate AudioParam
representing the frequency of oscillation in hertz.
Syntax
var oscillator = audioCtx.createOscillator(); oscillator.frequency.value = 3000; // value in hertz
Note: though the AudioParam
returned is read-only, the value it represents is not.
Value
An a-rate AudioParam
.
Example
The following example shows basic usage of an AudioContext
to create an oscillator node. For an applied example, check out our Violent Theremin demo (see app.js for relevant code).
// 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 'frequency' in that specification. |
Working Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 14 webkit | 23 | Not supported | 15 webkit 22 (unprefixed) |
6 webkit |
Feature | Android | Chrome | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | Not supported | 28 webkit | 25 | 1.2 | Not supported | Not supported | 6 webkit |
See also
Document Tags and Contributors
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Contributors to this page:
fscholz,
chrisdavidmills
Last updated by:
fscholz,