Plug ( Fender Mustang Amps Controller ) Plug is a Software to control Fender Mustang Amps, a linux replacement for the now discontinued Fender Fuse, for example. It addresses the following models: v1: Mustang I, Mustang II, Mustang III, Mustang IV, Mustang V, Mustang Bronco, Mustang Mini and Mustang Floor. v2: Mustang I, Mustang II, Mustang III, Mustang IV and Mustang V. This installer installs the udev rule "50-mustang.rules". You need to manually add you user to the plugdev group using: usermod -a -G plugdev "your-username" This requires the package gtest (available on Slackbuilds).