Web/API/AudioBufferSourceNode/buffer

From Get docs

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

Update compatibility data on GitHub

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
buffer Chrome

Full support 14

Edge

Full support 12

Firefox Full support 25

Notes'

Full support 25

Notes'

Notes' Firefox currently handles the value null incorrectly. Instead of producing a node that generates a single channel of silence, the node becomes unusable and will be ignored if you attempt to connect it to anything.

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

Notes'

Full support 26

Notes'

Notes' Firefox currently handles the value null incorrectly. Instead of producing a node that generates a single channel of silence, the node becomes unusable and will be ignored if you attempt to connect it to anything.

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