rakarrack (realtime audio effects processor for JACK) Rakarrack is a virtual digital effects rack, including such effects as distortion, echo, reverb, phaser, flanger, chorus, compressor, etc. This package uses POSIX filesystem capabilities to execute with elevated privileges (required for realtime audio processing). This may be considered a security/stability risk. Please read http://www.slackbuilds.org/caps/ for more information. To disable capabilities, pass SETCAP=no to the script.