comp.two plugin

Vari-MU = Vari-Glue

The comp.two plugin is a faithful emulation of the German-built hardware compressor by Rockruepel (Rock-bully in English). It is an all-tube vari-mu design, meaning there are no transistor stages in the circuit. Ideal for adding glue to your mix.

The Rockruepel History

Oliver Gregor, soldering iron in hand, has been building all sorts of machines since kindergarten. It is during his tenure as a tech at Skyline Studios in Düsseldorf that his love for music and electrical engineering merged into a relentless quest for creating the best audio equipment.

Amp only & transformers

The appeal of a compressor is as much the inherent sound of the unit as its ability to compress material. Using the same type of output tubes as the old Altec and RS124 compressors and with beautifully sounding Sowter transformers in the output stage, the COMP.TWO is also a great vibe box, with or without compression.


A compressor is only as useful as its side chain is smart and flexible. Through years of refinement Oliver made sure that COMP.TWO has none of the limitations of traditional monolithic vari-mu circuits and can be as clean or as dirty as you need, as fast as an 1176 or as slow as a Fairchild, all with the texture and tone of a classic tube compressor.

Modern controls

The team at PROCESS.AUDIO captured and recreated every nuance of the hardware and added its signature set of controls, like the Console Remote which lets you control all instances of the COMP.TWO plugin from a central interface, MS capabilities, high-pass filter on a sidechain, DRY/WET control, and of course, lots of presets designed by world-class producers and mixers.


Compression can be tricky to perceive, so PROCESS.AUDIO created a visually pleasing and easily readable gain reduction visualizer to aid in precise gain matching and provide a true understanding of the impact of the settings on the program material. That’s in addition to faithfully recreating the two gorgeous VU meters of the hardware units.


Watch the trailer :

Minimum requirements

CPU Intel Core 2 Duo, AMD Athlon 64 X2 or newer

RAM 4 GB or more

OS Windows 8.1, Windows 10, Windows 11 (64-bit versions only)

macOS 10.13 (High Sierra) to macOS 12 (Monterey), M1 compatible

PROTECTION iLok authorization