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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support141 Yes25 No156
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support Yes1141 Yes26 No15 ?

1. Before version 52, this was an AudioParam..

See also

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills, erikadoyle, James.Farrell, jpmedley, JesseTG
 Last updated by: fscholz,