Rakarrack is a guitar multi-effects processor that emulates a collection of stompboxes and rack-mounted audio effects. It processes audio through JACK and is designed to reproduce many of the effects commonly used by electric guitarists.
Rather than presenting a single amplifier model, Rakarrack provides a configurable effects chain. Musicians can combine distortion, modulation, filtering, delays and other processors, experimenting with different signal paths to produce a wide range of sounds.
The application processes stereo signals and can also be used with instruments other than guitar, including keyboards and vocals. Its MIDI facilities allow external controllers to adjust effects and switch between stored configurations.
Rakarrack is now a legacy project. Development of the maintained successor continues under the Rakarrack-plus name, so musicians considering a new installation should also examine that project.
This is free and open source software.
Key Features
- Provides 42 audio effects covering dynamics, distortion, filtering and modulation.
- Includes compressors, expanders, noise gates and graphic and parametric equalisers.
- Offers overdrive, fuzz, valve simulation and other distortion processors.
- Provides chorus, flanger, phaser, tremolo and wah-wah effects.
- Includes delays, echo, reverb and specialised effects such as AlienWah and MuTroMojo.
- Offers harmonisation and pitch-shifting effects.
- Includes a looper for recording and repeating audio passages.
- Allows effects to be arranged in a configurable processing chain.
- Supports stereo signal processing through JACK.
- Provides an integrated instrument tuner.
- Stores rack settings as presets organised into banks.
- Supports MIDI control of effects and preset changes.
- Can transmit MIDI notes to compatible external devices.
Website: rakarrack.sourceforge.net
Support:
Developer: Josep Andreu, Ryan Billing, Douglas McClendon, Arnout Engelen and contributors
License: GNU General Public License v2.0

Rakarrack is written in C. Learn C with our recommended free books and free tutorials.
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|---|---|
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Read our verdict in the software roundup.
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