64-voice polyphony. * 32-part multitimbrality (via two independent MIDI Ins). * 8MB of waveform ROM. * 654 patches on board: 354 from the SC55 MkII and 300 from JV80. Sound Map: 2 (SC-55, SC-88), Preset Sounds: 654, Drum Sound Set: 24 (including 2 SFX sets), User Sounds: 256, User Drum Sound Set: 2 * Built-in serial port for use with Mac or PC compatible computers.