Analog Obsession Kolin v4.0 VST VST3 AU WiN MAC

Analog Obsession Kolin v4.0 is a free vintage-style limiting amplifier plugin for producers who want to manage dynamics with adjustable timing and harmonic character. It suits home-studio musicians working on individual tracks or buses, particularly those who prefer a focused set of controls over a complex processing chain.

Attack settings span 1–50 ms, letting you adjust how quickly Kolin responds to incoming peaks. Release runs from 0.1–3 seconds, providing scope for both faster recovery and more gradual gain changes. The Mix control blends processed and unprocessed audio, making parallel dynamics processing possible within the plugin.

A sidechain high-pass filter covers 20–500 Hz, allowing you to reduce the influence of low frequencies on the detector. External sidechain support adds the option to trigger processing from another signal. Input adjustment offers a 40 dB range, while output gain provides ±20 dB for level matching.

Version 4.0 updates the interface, revises harmonic behavior and attack/release response, improves stability, and reduces CPU demand. The Windows version is a practical fit for compatible setups in FL Studio or Ableton Live.