AudioScheduledSourceNode.start

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 its currentTime attribute. A value of 0 (or omitting the when 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

undefined

Exceptions

TypeError

The value specified for when is negative.

Example

tbd

Specifications

Browser compatibility

See also

• Using the Web Audio API
• AudioScheduledSourceNode
• AudioBufferSourceNode
• ConstantSourceNode
• OscillatorNode