AudioBufferSourceNode.start

Syntax

var source = audioCtx.createBufferSource();
source.start(audioCtx.currentTime + 1,3,10);

Examples

The most simple example just starts the audio buffer playing from the beginning — you don't need to specify any parameters in this case:

source.start();

The following more complex example will start playing, after 1 second pause, a 10 second snippet of an audio buffer 3 seconds into the audio duration.

source.start(audioCtx.currentTime + 1,3,10);

Returns

Void.

Parameters

when

The when parameter defines when the play will start. If when represents a time in the past, the play will start immediately. If the method is called more than one time, or after a call to AudioBufferSourceNode.stop(), an exception is raised.

offset

The offset parameter, which defaults to 0, defines where the playback will start.

duration

The duration parameter, which defaults to the length of the asset minus the value of offset, defines the length of the portion of the asset to be played.

Specification

Specification	Status	Comment
Web Audio API The definition of 'start()' in that specification.	Working Draft

Browser compatibility

See also

• Using the Web Audio API