BaseAudioContext: createOscillator() method
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.
The createOscillator() method of the BaseAudioContext
interface creates an OscillatorNode, a source representing a periodic
waveform. It basically generates a constant tone.
Note:
The OscillatorNode()
constructor is the recommended way to create a OscillatorNode; see
Creating an AudioNode.
Syntax
js
createOscillator()
Parameters
None.
Return value
An OscillatorNode.
Examples
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.
js
// create web audio api context
const audioCtx = new AudioContext();
// create Oscillator node
const oscillator = audioCtx.createOscillator();
oscillator.type = "square";
oscillator.frequency.setValueAtTime(3000, audioCtx.currentTime); // value in hertz
oscillator.connect(audioCtx.destination);
oscillator.start();
Specifications
| Specification |
|---|
| Web Audio API # dom-baseaudiocontext-createoscillator |