(One might still be hooked to the computer for USB power. Although usually I would be using it, as with any other controller, to control software sounds in the computer, I figure it might come in handy sometimes to play it standalone, without playing through the computer. It is a 49 key MIDI controller, with built-in audio interface, and built-in hardware piano sound (supposed to be sampled Steinway grand).Īlthough it costs more than similar quality 49 key controllers, and I already have more than one audio interface (not needing another), the fact that it has built-in piano sound interests me. M-Audio Keystudio 49i MIDI Keyboard Controller