Midi (Musical Instrument Digital Interface)

seem to me there should be a halcomp for this kind of input
looking in to it but seem like the right thing for a control panel
www.music-group.com/Categories/Behringer...ers,DJ%20Controllers

It would probably be fairly easy to achieve a userspace driver using the Python MIDI libraries, but I would expect any particular application to be rather specific to the devices controlling and being controlled.