Recently, I started using the Ultralite Mk3 as my laptops interface. For MIDI, I have a Roland Sonic Cell (via USB). I have a solo gig, playing over backing parts, which I create as SMFs. I used to run the MOTU, the Sonic Cell, and other hardware sequencers into a small mixer to powered speakers.
As I am learning how to use the Ultralite, I tried running the Sonic Cell main outs into the Ultra, to make use of Cue Mix. I have each of the 16 channels in SC tweeked for the instruments, and it sounded pretty good into the
mixer,
but the difference in track seperation and instrument definition when I ran it thru the Ultra, is huge! 
To other users, is this because of converter quality, or Cue Mix (I only rolled-off low and high, with a very lite compression)? I'm hearing things in my songs that were masked before. Could I improve the songs even more by adding some other high-end converter box? Right now its all analog ins & outs,no SPIDF. Thumbs-up on a great product!
