AudioProcessingEvent
Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
The Web Audio API AudioProcessingEvent represents events that occur when a ScriptProcessorNode input buffer is ready to be processed.
Note: As of the August 29 2014 Web Audio API spec publication, this feature has been marked as deprecated, and is soon to be replaced by AudioWorklet.
Properties
The list below includes the properties inherited from its parent, Event.
| Property | Type | Description |
|---|---|---|
target Read only
| EventTarget | The event target (the topmost target in the DOM tree). |
type Read only
| DOMString | The type of event. |
bubbles Read only
| boolean | Does the event normally bubble? |
cancelable Read only
| boolean | Is it possible to cancel the event? |
playbackTime Read only
| double | The time when the audio will be played, as defined by the time of AudioContext.currentTime |
inputBuffer Read only
| AudioBuffer | The buffer containing the input audio data to be processed. The number of channels is defined as a parameter, numberOfInputChannels, of the factory method AudioContext.createScriptProcessor(). Note the returned AudioBuffer is only valid in the scope of the onaudioprocess function. |
outputBuffer Read only
| AudioBuffer | The buffer where the output audio data should be written. The number of channels is defined as a parameter, numberOfOutputChannels, of the factory method AudioContext.createScriptProcessor(). Note the returned AudioBuffer is only valid in the scope of the onaudioprocess function. |
Example
See BaseAudioContext.createScriptProcessor() for example code that uses an AudioProcessingEvent.
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
AudioProcessingEvent |
14 |
12 |
25 |
No |
15 |
6 |
≤37 |
18 |
25 |
14 |
Yes |
1.0 |
AudioProcessingEvent |
57 |
79 |
No |
No |
44 |
14.1 |
57 |
57 |
No |
43 |
14.5 |
7.0 |
inputBuffer |
14 |
12 |
25 |
No |
15 |
6 |
≤37 |
18 |
25 |
14 |
Yes |
1.0 |
outputBuffer |
14 |
12 |
25 |
No |
15 |
6 |
≤37 |
18 |
25 |
14 |
Yes |
1.0 |
playbackTime |
14 |
12 |
25 |
No |
15 |
6 |
≤37 |
18 |
25 |
14 |
Yes |
1.0 |
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/AudioProcessingEvent