Duet Piano for iPad features almost 60 piano keys spanning 5 full octaves to allow you to play REAL music! The keyboard is split into two halves, so you can use one hand on each keyboard, or flip one upside down and play together with a friend. You can also customize the octaves of each piano to your preference. Check out some samples of people using the Duet Piano here! Click on the Developer web site link on the left.