CELVIANO AP-33

ZPI SOUND SOURCE FOR A REALISTIC GRAND PIANO SOUND

ZPI stands for Zygotech Polynominal Interpolation. What is actually meant by this is an innovative sound source technique based on a new calculation method and created by CASIO: the digital-analog converter smooths the peaks and troughs between the sample points. This produces a distortion-free, even more harmonious sound.

NATURALLY SCALED HAMMER ACTION KEYBOARD

The springless, hammer-weight action, available exclusively from CASIO, gives the keys in the lower range a heavier feel than the keys in the high range. The result is a touch that closely resembles that of a real acoustic grand piano.