Arturia Comp DIODE-609 is an exacting recreation of the legendary British dual diode compressor/limiter, revered for its punchy, musical response on buses, drums, and mix groups. Enhanced for the modern producer, it adds a sidechain EQ input, mid/side processing, and a color limiter circuit that imparts harmonic warmth and grain to your signal. The virtual calibration control lets you push the unit beyond its original safety margins, opening up a rich palette of tones from transparent glue to saturated aggression.