The MC-50 MicroComposer is a dedicated sequencer featuring the Super
MRC software of Roland's MC500 mk II and the Super MRP Performance
system built into ROM.

Features include

40,000 note capacity (up to 8 songs) in memory
3.5" DS/DD disk drive
2 independent midi outputs
8 phrase tracks - each capable of storing data on 16 midi channels
separate rhythm track and temp track
Microscope editing mode for detailed editing
song link function
smart FSK with song pointer for tape sync
start/stop & punch in/out footswitch connectors
metronome out with level control
32 channel midi out capability
and real / step time recording.

MC50 - list $795.