Yamaha LP7A Pedal Unit for DGX660The Yamaha LP7A is an optional pedal unit for YPG 635 DGX 640 that gives you virtually the same level of expressive control as that of actual acoustic grand pianos. By default, the LP7A gives you Damper, Soft and Sostenuto control. The LP7A even includes Half Damper effect control, allowing you more realistic control over sustained sounds. In addition to Damper, Soft and Sostenuto control, the left pedal can also give you special control to the