The Roland MV-30 Studio "M" unit is a 
table-top MIDI sequencer that has its 
own interal MT-32 compatible sound
module, and its own interal MIDI 
mixer.

Here are some of its features:
Polyphonic
Multi-timbral (8)
MIDI in/out
Stereo MAIN outs + 2 sets assignable outs
FSK Sync-to-tape
and more...

Check out the Yahoo! Group.
http://www.yahoogroups.com/group/mv-30Studiom