The reduction read-only property of the DynamicsCompressorNode interface is a float representing the amount of gain reduction currently applied by the compressor to the signal.

Intended for metering purposes, it returns a value in dB, or 0 (no gain reduction) if no signal is fed into the DynamicsCompressorNode. The range of this value is between -20 and 0 (in dB).


var myReduction = compressorNodeInstance.reduction;


A float.


var audioCtx = new AudioContext();
var compressor = audioCtx.createDynamicsCompressor();
var myReduction = compressor.reduction;


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

Browser compatibility

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See also