sentences:  Nineteen were sold (SR-JV80-01 through SR-JV80-19), while 2 were given away as demonstration expansion boards for various promotions (SR-JV80-98 and SR-JV80-99).A built-in 3.5" floppy disk drive provides removable data storage for up to 1.44 MB of music sequences, sequence chain-play playlists, groove quantize settings, additional patch, rhythm set, performance and system settings storage.External connections include 2 unbalanced 1/4-inch "MIX" (left and right channel) and 2 unbalanced "DIRECT" (left and right channel) TS connector jacks.