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AudioScheduledSourceNode

The AudioScheduledSourceNode interface—part of the Web Audio API—is a parent interface for several types of audio source node interfaces which share the ability to be started and stopped, optionally at specified times. Specifically, this interface defines the start() and stop() methods, as well as the onended event handler.

You can't create an AudioScheduledSourceNode object directly. Instead, use the interface which extend it, such as AudioBufferSourceNode, OscillatorNode, and ConstantSourceNode.

Unless stated otherwise, nodes based upon AudioScheduledSourceNode output silence when not playing (that is, before start() is called and after stop() is called). Silence is represented, as always, by a stream of samples with the value zero (0).

Properties

Inherits properties from its parent interface, AudioNode, and adds the following properties:

Event handlers

onended
A function to be called when the ended event is fired, indicating that the node has finished playing.

Methods

Inherits methods from its parent interface, AudioNode, and adds the following methods:

start()
Schedules the node to begin playing the constant sound at the specified time. If no time is specified, the node begins playing immediately.
stop()
Schedules the node to stop playing at the specified time. If no time is specified, the node stops playing at once.

Specification

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

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 57[1] ? 53 (53) No support 44[1] ?
Feature Android Webview Chrome for Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 57[1] 57[1] 53.0 (53) No support 44[1] ?

[1] Before Chrome 57 and Opera 44, this interface was implemented as AudioSourceNode.

See also

Document Tags and Contributors

 Contributors to this page: jpmedley, Sheppy
 Last updated by: jpmedley,