Yamaha PSRS650 61-Key Keyboard Production Station With a total of 359 amazingly authentic instrument Voices (including 9 MegaVoices), and 181 accompaniment Styles, you can enjoy regionally unique music-and have more fun. You can configure the keyboard"s tuning to match the music you"re playing with one of the nine preset custom tunings, like Arabic or Pythagorean - or by creating your own! With Yamaha"s suite of apps ,such as NoteStar, Piano Diary, and Scale Tuner, you can add even more functionality to your feature-rich arranger workstation!