There are very few buttons on the interface; a few are designated to voices, others to reverb and sound effects, a few others to song selection and playback, and a couple sliders for master volume and EQ. There are a total of 24 preset tones on the piano, including 4 grand piano sounds, 4 electric pianos, and 4 organs, along with an assortment of other sounds. The piano also has a wonderful key action system, in the Graded Hammer (GH) set of keys.