SmackLabs has released a free compressor effect plugin for Windows.

Based off of a VCA design, the SL473 compressor has a unique compressor/limiter/expander function that can shape the dynamics of your source in an extremely musical way.

his compressor was the main compressor for vinyl disc cutting from the late 1970’s and on. Known for transparent clean compression, you can really compress the source without the typical negative effects.

The expander controls are found to the left with yellow knobs. The expander has a fixed attack and ratio, giving the user control of the Threshold and Recovery of the expander. The compressor is controlled by the black knobs, with the ratio knob being red. The compressor has a fixed threshold, to manage the fixed threshold, the user can add gain with the “Compr Gain” knob.

SL473 is available to download as a 64-bit VST plugin for Windows.