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

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.

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 });