Will sell individual or complete 32 channel set  The Mackie Control Universal Pro from Mackie is a 9-fader (8-channels + master) USB/MIDI controller that provides mixing, editing, automation and navigational control for any supported digital audio workstation. Utilizing a proprietary communication protocol allows the controller to "talk" to various software applications without additional set-up. he unit communicates with the computer via USB and provides connectors for up to three pieces of external MIDI gear. For some users this functionality could allow them to remove any external MIDI interfaces from their systems.