Digital Piano. The storied tradition of the piano, an instrument with a long history going back to the 1700s, lives on today in three superb pianos. CASIO exhaustively researched and analyzed the tonal characteristics of these three full concert grand pianos, made in Berlin, Hamburg, and Vienna. We drew upon the full range of our digital technologies to express the tone color of these grand pianos in the newly developed AiR Grand Sound Source. It is now possible to enjoy to the fullest the magnificent sound of these historic pianos, beloved by Liszt, Debussy, and other musical giants, in a single digital piano. When speaking of the C. Bechstein piano, Claude Debussy declared, "Piano music should only be written for the Bechstein." This history of C. Bechstein pianos begins with the company's founding by Carl Bechstein in Berlin in 1853. Now, Casio has joined in collaboration with this renowned piano maker to develop the "Berlin Grand" tone, a balanced, elegant sound with a clearly defined shape. To create its exquisite clarity of tone and vibrancy, we analyzed the tone color of the ultimate C. Bechstein masterpiece, the D282. The resulting sound, which meets with the approval of even C. Bechstein master piano maker Werner Albrecht, has been incorporated into the CELVIANO AP-700 as "Berlin Grand." Natural Playing Feel Approaching That of a Grand Piano Firm Touch That Converts the Player's Thoughts into Sound. The Simulated ebony and ivory keys offers the luxurious feel and texture as well as the smooth touch of a grand piano keyboard. The minutely detailed crimp surface finish inhibits finger slippage due to sweat and gives the sensation of a perfect fingertip fit, even when playing for extended periods. The sound volume and quality change when the lid on a grand piano is raised or lowered. The Lid Simulator reproduces the same acoustic effects for enhanced enjoyment with a digital piano. The acoustic effects of opening and closing the lid are simulated in fine detail. The piano sound you are seeking as you play is always available for your enjoyment by selecting the degree to which the lid is raised or lowered. Finish: Black