Compressor

Dynamic range compressor that reduces the level of signals above a threshold to even out dynamics or add punch. Threshold, ratio, attack, and release shape the gain reduction, while a soft knee smooths the onset and a parallel mix control blends the compressed signal back with the dry signal. An external sidechain detector input lets another signal trigger the compression, enabling ducking and rhythmic pumping effects.

Inputs

Audio In

Audio signal input

ID	audio
Signal	audio · audio rate · stereo
Unit	normalized
Range	-1 to 1 normalized
Default	0
Coercion	Implicit

Sidechain

Audio-rate external detector source. If unconnected, the detector follows Audio In.

ID	sidechain
Signal	audio · audio rate · stereo
Unit	normalized
Range	-1 to 1 normalized
Default	0
Coercion	Implicit

Mix

Live dry/wet mix control (parallel compression)

ID	mix
Signal	control · control rate
Unit	mix01
Range	0 to 1 mix01
Default	1
Coercion	Implicit

Outputs

Audio Out

Audio signal output

ID	audio
Signal	audio · audio rate · stereo
Unit	normalized
Range	-1 to 1 normalized
Coercion	Implicit

Parameters

Threshold

Sets the level above which compression begins.

ID	thresholdDb
Type	float
Control	slider
Range or Options	-60 to 0 dB, step 0.1
Default	-18
Group	Compression

Ratio

Sets how strongly signals above the threshold are reduced.

ID	ratio
Type	float
Control	slider
Range or Options	1 to 20 ratio, step 0.1, log
Default	4
Group	Compression

Knee

Softens the transition into compression around the threshold.

ID	kneeDb
Type	float
Control	slider
Range or Options	0 to 24 dB, step 0.1
Default	6
Group	Compression

Attack

Sets how quickly gain reduction engages after the signal crosses the threshold.

ID	attackMs
Type	float
Control	slider
Range or Options	0.1 to 100 ms, step 0.1, log
Default	10
Group	Timing

Release

Sets how quickly gain reduction recovers after the signal falls below the threshold.

ID	releaseMs
Type	float
Control	slider
Range or Options	1 to 1000 ms, step 1, log
Default	100
Group	Timing

Makeup

Adds output gain after compression to restore level.

ID	makeupDb
Type	float
Control	slider
Range or Options	0 to 24 dB, step 0.1
Default	0
Group	Output

Mix

Blends the dry input with the compressed signal.

ID	mix
Type	float
Control	slider
Range or Options	0 to 1 mix01, step 0.01
Default	1
Group	Output

Details

Canonical ID	dyn.compressor
Category	effects
Runtime Surface	audio
Runtime Targets	audio-worklet
JUCE Early Access	Supported
Early Access Note	Native-supported in the plugin for the current catalog/runtime support contract.
Audio Channel Behavior	Preserve (stereo in → stereo out, width unchanged)