The frequency
property of the OscillatorNode
interface is an a-rate AudioParam
representing the frequency of oscillation in hertz.
Note: though the AudioParam
returned is read-only, the value it represents is not.
The frequency
property of the OscillatorNode
interface is an a-rate AudioParam
representing the frequency of oscillation in hertz.
Note: though the AudioParam
returned is read-only, the value it represents is not.
An a-rate AudioParam
.
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.setValueAtTime(440, audioCtx.currentTime); // value in hertz oscillator.start();
Specification |
---|
Web Audio API # dom-oscillatornode-frequency |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
frequency |
20
|
12
|
25
|
No
|
15
|
6
|
≤37
|
25
|
25
|
14
|
6
|
1.5
|
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https://developer.mozilla.org/en-US/docs/Web/API/OscillatorNode/frequency