In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. As the successor of the famous P-80 the P-90 recommends itself as a professional portable Digital Piano for the stage. Due to the triple Dynamic Stereo Sampling (DSS) and special sustain and key-off samples its piano sound is incredible natural and accurate. And with its 64 notes of polyphony the P-90 produces even long sustained passages.