Check the listing for details. Yamaha Arius YDP-S55 Console Digital Piano White Walnut. Color: White Walnut, Condition: New. Listed at 1599.99 USD. The Yamaha Arius YDP-S55 features an improved Yamaha CFX concert grand piano sound engine and the touch of the revered Graded Hammer 3 (GH3) keyboard with synthetic ebony and ivory key tops. The YDP-S55 features a slim design, making it an ideal choice for those with space constraints, such as college students or those living in smaller apartments. Connecting to the Smart Pianist app for iOS adds a graphic user interface that makes selecting Voices or configuring settings even easier. Smart Pianist can even analyze songs stored in your music library and display a chord chart, allowing you to learn and play along with your favorite songs. CFX Stereo Sampling faithfully reproduces the sound of Yamaha's flagship CFX Full Concert Grand.