This 49-key controller is designed to connect directly to your USB equipped Mac or PC providing you adapter-free connection powered through USB bus, plug and play operation, and easy installation. The PC-300 has forty-nine full-size, expressive, touch-sensitive keys for recording every musical nuance. The data slider can be assigned to any MIDI controller from volume, to reverb, to pan position. The PC-300 has an optional port for sustain and hold pedals for use with the Roland DP-6 or Roland DP-2. To help you put the future of desktop media production into your hands the Roland ED PC-300 ships with an hybrid Audio and MIDI sequencing software program called Cubasis A/V by the world's leading music software company Steinberg.