Edirol PCR-500 Midi Keyboard Controller The new PCR Series offers all the controls of previous models allow players to maximize the playability and operability Assignable Controls & 18 Velocity Pads - The new PCR Series has all the existing controls of the previous range. Unique Crossfader & Long-Throw Sliders - The new Crossfader allows control of two parameters at the same time High-Quality Keyboards with Aftertouch - The new ultra-sensitive keyboards provide a wider dynamic range under the player's fingertips. Intelligent Dynamic Mapping and Editor Software automatically assign its physical controls to the most important parameters