The buffer
property of the AudioBufferSourceNode
interface provides the ability to play back audio using an AudioBuffer
as the source of the sound data.
If the buffer
property is set to the value null
, the node generates a single channel containing silence (that is, every sample is 0).
Syntax
AudioBufferSourceNode.buffer = soundBuffer;
Value
An AudioBuffer
which contains the data representing the sound which the node will play.
Example
For a full working example, see this code running live, or view the source.
var myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate); button.onclick = function() { // Fill the buffer with white noise; //just random values between -1.0 and 1.0 for (var channel = 0; channel < channels; channel++) { // This gives us the actual ArrayBuffer that contains the data var nowBuffering = myArrayBuffer.getChannelData(channel); for (var i = 0; i < frameCount; i++) { // Math.random() is in [0; 1.0] // audio needs to be in [-1.0; 1.0] nowBuffering[i] = Math.random() * 2 - 1; } } // Get an AudioBufferSourceNode. // This is the AudioNode to use when we want to play an AudioBuffer var source = audioCtx.createBufferSource(); // set the buffer in the AudioBufferSourceNode source.buffer = myArrayBuffer;
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'buffer' in that specification. |
Working Draft | Initial definition |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
buffer | Chrome Full support 14 | Edge Full support 12 | Firefox
Full support
25
| IE No support No | Opera Full support 15 | Safari Full support 6 | WebView Android Full support Yes | Chrome Android Full support 18 | Firefox Android
Full support
26
| Opera Android Full support 14 | Safari iOS Full support Yes | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.