Fast Soft Knee Compressor is a soft knee compressor optimized for low CPU usage. While it is not that difficult to build a hard knee compressor with a low CPU usage, it is quite difficult to do so for a soft knee, especially if you want to control the margin around the threshold precisely while maintaining a consistent curve. The compressor also features a simple limit circuit to avoid clipping.

Features:

• Lightweight soft knee compressor.
• Continuous and consistent characteristic.
• Fully adjustable soft knee in dB (as margin below the threshold).
• Stereo/dual mono processing.
• Extra limit circuit to avoid clips.
• Simple auto make-up gain adjustment.
• 10 presets.
• Mathematically optimised (using three psychoacoustical evaluated approximation functions).
• Open source (as part of Christian's Delphi ASIO & VST Project).