This is a quick tutorial that will show how to get Hercules RMX installed and working with Mixxx DJ software on Ubuntu 9.10 - the Karmic Koala . First go to http://www.mixxx.org/download.php and downloaded the latest version of Mixxx Then download the package below and install the Hercules RMX driver for Ubuntu Here hdjmod-dkms_1.28_karmic.deb Then download the Hercules RMX control panel here ftp://ftp.hercules.com/pub/webupdate/DJCSeries/Hercules_DJSeries_Linux.tgz And if your on x86 install hdjcpl_1.09-1_i386.deb and if your on x64  install hdjcpl_1.09-1_amd64.deb Make sure MIDI Channel is set to (1 Default) Now open up Mixxx and go to Options>Preferences and make sure your settings are the same as the following images and you are set to mix! Thanks to pizzapanther on the Mixxx forums we now have a working dep for Hercules RMX drivers for Ubuntu.