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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 });

Specifications

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

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Microsoft Edge Opera Safari (WebKit)
Basic support (Yes)
 
52 (52) No support ?

(Yes)

No support
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support No support 52.0 (52) No support No support No support (Yes)

Document Tags and Contributors

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