M-Audio's Keystation 88 is a powerful, simple MIDI controller designed for music sequencing and playing virtual instruments on your Mac or PC. It features 88 full-speed speed sensors and a series of controls that expand the range of noteable notes, expressive capabilities, and improves the recording workflow. Use octave, pitch-bend and modulation wheel, transport and directional buttons to play, play, and record with the supplied software without using a mouse or trackpad. The Keystation 88 also includes a 1/4 "(6.3 mm) foot pedal input that allows you to use an external control pedal, such as SP2 (sold separately), for a true piano support.