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).
js
// create web audio api context const audioCtx = new (window.AudioContext || window.webkitAudioContext)(); // create Oscillator node const 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 | 4.4 | 25 | 25 | 14 | 6 | 1.5 |
© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/OscillatorNode/frequency