The piano sound is a sampling from the Yamaha Full Concert Grand Piano "CFIIIS", which has won high plaudits at the world's most famous concert halls and music competitions. The very top piano was selected, and an experienced tuner adjusted it to top condition. Yamaha emphasizes the natural sounds that should emanate from pianos. Sampling is carefully performed over a long period, from the sound start until fadeout, to reproduce a natural sound and attenuation that feels nothing like an electronic piano. In addition, they also focus on the change in timbre due to the strength or weakness of the key strike that is so characteristic of pianos. Sound sampling covered more than 10 stages of key strike strength for each keyboard. Uses "AWM Dynamic Stereo Sampling", sounds that most closely express the piano characteristics, obtained through rigorous recording. The Yamaha development team spent a lot of time together with pianists in thorough pursuit of the optimum touch and timbre combination, resulting in achievement of natural sound changes that sound like a person is actually playing a grand piano, no matter how the keyboard is played. Maximum simultaneous tones are an ample 128 tones. Enables enjoyment of rich sounds. Based on Yamaha's own technology, there is no unnatural sound cut-off even when the pedal is pressed and sounds overlaid, so that a performance with full presence can be achieved, no matter what song is played. The piano maker that is Yamaha has made use of its grand piano-making know-how to achieve a keyboard that offers a natural playing feel even on an electronic piano. Achieves slight differences in touch, with the low sound regions of the grand piano being heavy to the touch, while the high sound regions become steadily lighter. With stability and endurance in response to any kind of performance, it offers the security and quality expected of Yamaha keyboards.