Can you get a device that has knobs and faders on it as well as possibly mod wheel and pitch bend all in one small single box?

basically a midi controller unit where you can assign it to control 1-16 of the midi channels in a sequence.

An example of putting it to use would be connecting it via Midi- IN to an arranger keyboard and using it as a realtime control unit for cutoff, harmonics, reverb, chorus, eq, mod, pitch bend etc. and you have the ability to switch which midi channel it is targeting...

does such a device exist?

Nick