The start()
method on AudioScheduledSourceNode
schedules a sound to begin playback at the specified time. If no time is specified, then the sound begins playing immediately.
Syntax
AudioScheduledSourceNode.start([when [, offset [, duration]]]);
Parameters
when
Optional- The time, in seconds, at which the sound should begin to play. This value is specified in the same time coordinate system as the
AudioContext
is using for itscurrentTime
attribute. A value of 0 (or omitting thewhen
parameter entirely) causes the sound to start playback immediately. offset
Optional- A floating-point number indicating the offset, in seconds, into the audio buffer where playback should begin. If 0 is passed then the playback will start from the beginning.
duration
Optional- A floating-point number indicating the duration, in seconds, to be played. If no value is passed then the duration will be equal to the length of the audio buffer minus the offset value
Return value
Exceptions
TypeError
- The value specified for
when
is negative.
Example
tbd
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'start()' in that specification. |
Working Draft |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 56.0[1] | ? | 53 (53) | No support | 43[1] | ? |
Feature | Android Webview | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|
Basic support | 56.0[1] | ? | 53.0 (53) | ? | ? | 43[1] | ? | 56.0[1] |
[1] Chrome and Opera implement this method on the ConstantSourceNode
interface.