This is all housed in a compact desktop unit with USB 2.0 connectivity to the host computer. The latest addition to your dilemma is M-Audio's Fast Track Ultra, which provides six-in/six-out analogue audio interfacing with 24-bit audio at sample rates up to 96kHz, alongside stereo S/PDIF digital I/O and MIDI I/O. There is no denying that home and project studio owners have never had a better range of audio and MIDI interfaces to choose from, whatever their budget or feature requirements. The world is simply teeming with audio interfaces these days, so what does M‑Audio's latest offering, the Fast Track Ultra, have that the others don't?