The Best Free VST Effects - Compressor:
Audio production software for mastering, mixing, and music composing:
Stereo bus compressor VST-plugin
The Density mkII VST plugin by Variety Of Sound is a great freeware bus compressor that offers smooth and versatile dynamic processing on the stereo bus. The Density mkII VST plugin offers zero latency processing, side-chain compression, and dual channel processing. The compressor can operate as a dual mono device, splitting the audio signal in the left and right channel, as a normal stereo compressor, or as a stereo compressor capable of splitting the audio signal into a mid/side signal, compressing the two frequency areas independently.
Smooth analog style compressor
The free Classic Compressor by Kjaerhus Audio is a classic analog style VST Compressor Plugin with a lot of warmth and punch. The Classic Compressor has been designed specifically for individual instruments and vocal, but the VST plugin is also useable on your final mixes. The Classic Compressor plugin features smooth compression, adjustable knee (hard to soft), ultra low CPU usage, and support for all sampling rates.
Simple side chain compressor
The free Side Chain Compressor plugin by Slim Slow Slider offers simple side chain compression (if your host allows it) both in mono and stereo. It features soft and hard knee, and the usual compressor control buttons like threshold, ratio, attack, and release. Of course the Side Chain Compressor VST plugin can also function like any other "normal" compressor without side chaining the audio signal.
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