The createOscillator()
method of the BaseAudioContext
interface creates an OscillatorNode
, a source representing a periodic
waveform. It basically generates a constant tone.
Syntax
var oscillatorNode = 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.setValueAtTime(3000, audioCtx.currentTime); // value in hertz
oscillator.connect(audioCtx.destination);
oscillator.start();
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'createOscillator' in that specification. |
Working Draft |
Browser compatibility
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