GainNode: gain property
The gain property of the GainNode interface is an a-rate AudioParam representing the amount of gain to apply.
Value
An AudioParam.
Note:
Though the AudioParam returned is read-only, the value it represents is not.
Examples
See BaseAudioContext.createGain() for example code showing how to use an AudioContext to create a GainNode, which is then used to mute and unmute the audio by changing the gain property value.