DynamicsCompressorNode: knee property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.

The knee property of the DynamicsCompressorNode interface is a k-rate AudioParam containing a decibel value representing the range above the threshold where the curve smoothly transitions to the compressed portion.

The knee property's default value is 30 and it can be set between 0 and 40.

Describes the effect of a knee, showing two curves one for a hard knee, the other for a soft knee.

Value

An AudioParam.

Note: Though the AudioParam returned is read-only, the value it represents is not.

Examples

js
const audioCtx = new AudioContext();
const compressor = audioCtx.createDynamicsCompressor();
compressor.knee.value = 40;

See BaseAudioContext.createDynamicsCompressor() for more complete example code.

Specifications

Specification
Web Audio API
# dom-dynamicscompressornode-knee

Browser compatibility

BCD tables only load in the browser

See also