American Audio Radius 1000 2000 3000
This is a series of CD and USB media players that can control Mixxx over USB with MIDI. They can also play timecode from CDs or USB drives which can control Mixxx when they are connected by a sound card.
This is the Mixxx Wiki - 
Mixxx is a free and open-source DJ software.
Manual
Hardware Compatibility
Reporting Bugs
Getting Involved
Contribution Guidelines
Coding Guidelines
Using Git
Developer Guide
Contributing Mappings
Mixxx Controls
MIDI Scripting
Components JS