Other FeaturesThe YDP-103 has improved on the traditional AWM (Advanced Wave Memory) synthesis to deliver real piano sounds. AWM is a technology that utilizes digital recordings of acoustic instruments, allowing you to enjoy grand piano tone in a relatively small cabinet. With over a century of experience in building acoustic grand pianos, Yamaha brings that legacy to their digital instruments. A Graded Hammer Standard (GHS) 88-key piano keyboard provides a heavier touch in the low end and lighter touch in the high end, and is similar to the hammers inside an acoustic piano. GHS is great for the aspiring pianist, because practicing with the GHS action builds proper finger technique for playing on an acoustic piano. Additionally, the matte finish of the black keys makes them less slippery when playing for extended periods of time. Half-damper pedal control creates more detailed nuance and subtlety when playing, similar to pedaling on a grand piano. This feature allows for continuously increasing lengths of sustained notes, from slight to full, as the sustain pedal is depressed. 10 Voice Demo Songs ,10 Piano Preset Songs. Tempo Range 32 – 280.