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 [[../../../../../../../mdn.github.io/webaudio-examples/audio-buffer/index|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 APIThe 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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
buffer
|
Chrome
Full support 14 |
Edge
Full support 12 |
Firefox Full support 25 Full support 25 Notes' Firefox currently handles the value |
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 Full support 26 Notes' Firefox currently handles the value |
Opera Android
Full support 14 |
Safari iOS
Full support 6 |
Samsung Internet Android
Full support 1.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.'
- See implementation notes.
See also
AudioBufferSourceNode.buffer by Mozilla Contributors is licensed under CC-BY-SA 2.5.