Still a very ingenious device this Yamaha MU-50. Compatible with anything that supports MIDI, including music keyboards, computers and retro systems (used myself to listen to midi/adlib music from old DOS/MSX/Amiga/Atari ST games).

The MU-50 can be seen as the standard of XG tone generators. The MU50 is 16-part, 32-voice polyphony, 759 voices and A/D input. Excellent data compatibility and effects make this model model equivalent to much more expensive models.

This copy works excellently, but the top does show some wear (see photos). The screen indicates that the battery is low - this is easy to replace. With new adapter (12V 2A). Without MIDI cables, but these are easy to find.