fully 24-bit front end, with two xlr inputs, two balanced 1/4" trs inputs, two unbalanced 1/4" inputs (switchable to hi-z), and s/pdif i/o. four channels of audio in and two out simultaneously via usb. no opening your computer, no sound card to install - it's usb, so you can even hot-plug it. it's got real tactile controls for the most-used functions in your daw applications. transport, mute/solo and locate keys, unlimited banks of eight faders, an eq module that supports control of up to four bands of fully parametric eq, plus four aux sends and a panpot. it's even got 32 channels of midi i/o. use one for your keys and modules, and the other for mtc, to lock your mtc-capable tape tracks to your computer. $399 like new