Casio CTK-574 61-Key Digital KeyboardNotes CASIO CTK 574 features a 61 key (5 octave) keyboard with touch sensitive, full size keys, 100 auto accompaniments that play along with you, a built in teaching system, a clear, backlit LCD display, 128 General MIDI sounds plus 9 drum and percussion kits, 24 note polyphony (plays 24 notes at a time) and it's 16 part multibtimbral (plays 16 sounds at a time) for a big, full sound from such an affordable keyboard. A Casio CTK 574 61 Key Digital