ConstantSourceNode()

The ConstantSourceNode() constructor creates a new ConstantSourceNode object instance, representing an audio source which constantly outputs samples whose values are always the same.

Syntax

var constantSourceNode = new ConstantSourceNode(context, options);

Parameters

context
An AudioContext representing the audio context you want the node to be associated with.
options
A ConstantSourceOptions dictionary object defining the properties you want the ConstantSourceNode to have:
  • offset: A read-only AudioParam specifying the constant value generated by the source. The default is 1.0. The normal range is -1.0 to 1.0, but the value can be anywhere in the range from -Infinity to +Infinity.

Example

In this example, an audio context is created, then a ConstantSourceNode is established with its offset initialized to 0.5.

let audioContext = new AudioContext();

let myConstantSource = new ConstantSourceNode(audioContext, { offset: 0.5 });

Note: The new ConstantSourceNode created by the constructor has a channelCount of 2.

Specifications

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

Browser compatibility

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DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
ConstantSourceNode() constructorChrome Full support 56Edge ? Firefox Full support 52IE No support NoOpera Full support 43Safari No support NoWebView Android Full support 56Chrome Android Full support 56Firefox Android Full support 52Opera Android Full support 43Safari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
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No support
Compatibility unknown  
Compatibility unknown