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 extends 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.

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.

Events

Listen to these events using addEventListener() or by assigning an event listener to the oneventname property of this interface:

ended
Fired when the source node has stopped playing, either because it's reached a predetermined stop time, the full duration of the audio has been performed, or because the entire buffer has been played.
Also available using the onended event handler property.

Specification

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

Browser compatibility

DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
AudioScheduledSourceNodeChrome Full support 57
Full support 57
No support 14 — 58
Alternate Name
Alternate Name Uses the non-standard name: AudioSourceNode
Edge Full support ≤79Firefox Full support 53
Full support 53
No support 25 — 53
Alternate Name
Alternate Name Uses the non-standard name: AudioSourceNode
IE No support NoOpera Full support 44
Full support 44
No support 15 — 44
Alternate Name
Alternate Name Uses the non-standard name: AudioSourceNode
Safari ? WebView Android Full support 57
Full support 57
No support ? — 58
Alternate Name
Alternate Name Uses the non-standard name: AudioSourceNode
Chrome Android Full support 57
Full support 57
No support 18 — 58
Alternate Name
Alternate Name Uses the non-standard name: AudioSourceNode
Firefox Android Full support 53
Full support 53
No support 25 — 53
Alternate Name
Alternate Name Uses the non-standard name: AudioSourceNode
Opera Android Full support 44
Full support 44
No support 14 — 44
Alternate Name
Alternate Name Uses the non-standard name: AudioSourceNode
Safari iOS ? Samsung Internet Android Full support 7.0
Full support 7.0
No support 1.0 — 7.0
Alternate Name
Alternate Name Uses the non-standard name: AudioSourceNode
ended eventChrome Full support 14Edge Full support ≤79Firefox Full support 53IE No support NoOpera Full support 15Safari ? WebView Android Full support YesChrome Android Full support 18Firefox Android Full support 25Opera Android Full support 14Safari iOS ? Samsung Internet Android Full support 1.0
onendedChrome Full support 14Edge Full support ≤79Firefox Full support 53IE No support NoOpera Full support 15Safari ? WebView Android Full support YesChrome Android Full support 18Firefox Android Full support 25Opera Android Full support 14Safari iOS ? Samsung Internet Android Full support 1.0
startChrome Full support 14Edge Full support ≤79Firefox Full support 53IE No support NoOpera Full support 15Safari ? WebView Android Full support YesChrome Android Full support 18Firefox Android Full support 25Opera Android Full support 14Safari iOS ? Samsung Internet Android Full support 1.0
stopChrome Full support 14Edge Full support ≤79Firefox Full support 53IE No support NoOpera Full support 15Safari ? WebView Android Full support YesChrome Android Full support 18Firefox Android Full support 25Opera Android Full support 14Safari iOS ? Samsung Internet Android Full support 1.0

Legend

Full support
Full support
No support
No support
Compatibility unknown
Compatibility unknown
Uses a non-standard name.
Uses a non-standard name.

See also