Edirol PCR-800 Midi Keyboard Controller 50 Assignable Controllers - The new PCR Series offers all the controls of previous models, but with the addition of even more controls The new PCR Series adds exciting new features playing drums and triggering sampler phrases. The new Crossfader allows control of two parameters at the same time, and can be used to control synthesizer filters High-Quality Keyboards with Aftertouch - The new ultra-sensitive keyboards provide a wider dynamic range under the player's fingertips Dynamic Mapping allows the PCR to automatically assign its physical controls to the most important parameters Smooth key action, keys shaped for comfortable glissando playing, silent operation enhanced playability of these keyboards