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The type property of the OscillatorNode interface represents the shape of the oscillator wave generated. Different waves will produce different tones.
Syntax
var oscillator = audioCtx.createOscillator(); oscillator.type = 'square';
Value
A DOMString specifying the shape of oscillator wave. The different available values are:
sinesquaresawtoothtrianglecustom
Note: You can use the OscillatorNode.setPeriodicWave method when using custom to use a custom wave type.
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 = 440; // value in hertz oscillator.start();
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Audio API The definition of 'type' in that specification. |
Working Draft |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 14 webkit | 23 | No support | 15 webkit 22 (unprefixed) |
6 webkit |
| Feature | Android | Chrome | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | No support | 28 webkit | 25 | 1.2 | No support | No support | 6 webkit |