Unlimited sounds unlimited possibilities. The Kurzweil PC4 Performance Controller is a high quality professional keyboard performance centre. It features a wide range of patches and can emulate any sound - thanks to the V.A.S.T system. There are 256 voices for massive polyphony. Meaning you can easily craft the music that its in your head and make it a reality. Its incredibly fast too with flash-play which provides the synthesizer with 2GB of content with zero loading times. Its a must-have for the professional keyboardist - with hammer weighted action sequencing power and a powerful effects engine. Its all youll ever need.