Unlike the standard digital pianos of its day, the PR 305 was anything but the electronic keyboard–it was a Digital Ensemble. The “PCM” in its name stands for Pulse Code Modulation, a sound technology Technics developed that allowed them to produce incredibly accurate instrument sounds with this digital ensemble. This technological innovation gave musicians a greater sense of presence... https://digitalprhive.com/technics-pr-305-digital-piano-overview/