The buffer
property of the ConvolverNode
interface represents a mono, stereo, or 4-channel AudioBuffer
containing the (possibly multichannel) impulse response used by the ConvolverNode
to create the reverb effect.
This is normally a simple recording of as-close-to-an-impulse as can be found in the space you want to model. For example, if you want to model the reverb in your bathroom, you might set up a microphone near the door to record the sound of a balloon pop or synthesized impulse from the sink. That audio recording could then be used as the buffer.
This AudioBuffer
must have the same sample-rate as the AudioContext
or an exception will be thrown. At the time when this attribute is set, the buffer and the state of the attribute will be used to configure the ConvolverNode
with this impulse response having the given normalization. The initial value of this attribute is null
.
Syntax
var audioCtx = new AudioContext();
var convolver = audioCtx.createConvolver();
convolver.buffer = myAudioBuffer;
Value
An AudioBuffer
.
Example
var audioCtx = new (window.AudioContext || window.webkitAudioContext)();
var convolver = audioCtx.createConvolver();
...
// grab audio track via XHR for convolver node
var soundSource, concertHallBuffer;
ajaxRequest = new XMLHttpRequest();
ajaxRequest.open('GET', 'concert-crowd.ogg', true);
ajaxRequest.responseType = 'arraybuffer';
ajaxRequest.onload = function() {
var audioData = ajaxRequest.response;
audioCtx.decodeAudioData(audioData, function(buffer) {
concertHallBuffer = buffer;
soundSource = audioCtx.createBufferSource();
soundSource.buffer = concertHallBuffer;
}, function(e){"Error with decoding audio data" + e.err});
}
ajaxRequest.send();
...
convolver.buffer = concertHallBuffer;
Specifications
Specification | Status | Comment |
Web Audio APIThe definition of 'buffer' in that specification. | Working Draft |
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 |
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 also
ConvolverNode.buffer by Mozilla Contributors is licensed under CC-BY-SA 2.5.