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
endedevent 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.