I've just been to a mastering seminar where he talked a fair bit about increasing the stereo of a mix.
http://www.ccat.edu.au/index.php?opt...id=71&Itemid=1
There should be a link on that page to the notes from the night. Basically, you can invert the phase of the right signal of a sound and mix it back into the left signal to leave you with just the stereo signal. You can then boost or eq the stereo signal and add it back to the mono for extra stereo. This also seems to be a mono output friendly way of doing it.
There's also this article at Sound on Sound on other techniques for extra stereo
http://www.soundonsound.com/sos/oct0.../stereomix.htm
There's also numerous plug ins that'll help. Try "flux - stereo tool" - free and not too shabby.
I've had a go at splitting the signal to just the stereo signal but I'm slightly confused with some of the routing on the TI. With the TI, when I select "USB L" is it just the left signal? Or is it the left and right signal panned hard left?