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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 ⁨July 2015⁩.

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

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

Desktop Mobile
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android WebView on iOS
knee 19 12 25 15 6 25 25 14 6 1.5 4.4 6

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/DynamicsCompressorNode/knee