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DynamicsCompressorNode: ratio 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 ratio property of the DynamicsCompressorNode interface Is a k-rate AudioParam representing the amount of change, in dB, needed in the input for a 1 dB change in the output.

The ratio property's default value is 12 and it can be set between 1 and 20.

Describes the effect of different ratio on the output signal

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.ratio.value = 12;

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

Specifications

Specification
Web Audio API>
# dom-dynamicscompressornode-ratio>

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
ratio 19 12 25 15 6 25 25 14 6 1.5 4.4 6

See also

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https://developer.mozilla.org/en-US/docs/Web/API/DynamicsCompressorNode/ratio