Yamaha DGX640 Cherrywood Digital Piano Bundle with Music Stand and Polishing Cloth 88-key Graded Hammer Standard keyboard with matte black finish key 535 Voices Polyphony: 64 Piano voice quality: new Live! Grand Piano Featured voices: 4 Pianos (Live! Grand Piano, Live! Pop Grand, Live! Warm Grand, Ambient Grand Piano), 9 Live! Voices / 7 Cool! Voices / 8 Sweet! Voices