An affordable, easy-to-use starter keyboard and software combination, M-Audio"s Evolution eKeys 37 is perfect for computer users who would love to play and create music but have never known where to begin. Whether you aim to play the piano, have fun with pre-school nursery rhymes, create your own compositions, or concoct potent mixes from the supplied library of professionally recorded samples, eKeys 37 does it all. The keyboard is MIDI (Musical Instrument Digital Interface) capable and USB-powered, so there"s no bulky power supply to hook up.