The normalize
property of the ConvolverNode
interface is a boolean that controls whether the impulse response from the buffer will be scaled by an equal-power normalization when the buffer
attribute is set, or not.
Its default value is true
in order to achieve a more uniform output level from the convolver, when loaded with diverse impulse responses. If normalize is set to false
, then the convolution will be rendered with no pre-processing/scaling of the impulse response. Changes to this value do not take effect until the next time the buffer
attribute is set.
Syntax
var audioCtx = new AudioContext(); var convolver = audioCtx.createConvolver(); convolver.normalize = false;
Value
A boolean.
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.normalize = false; // must be set before the buffer, to take effect convolver.buffer = concertHallBuffer;
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'normalize' 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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
normalize | 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