Came across this from one of my website perusals.   Alesis is not a brand I am familiar with, although I understand they are well established in the musician/studio arena's.   Alesis doesn't go into further detail of what is under the hood.  So I wonder just how the balanced audio output...

So I was having a look at CES showcase stuff and I came across this video;   http://www.astoundsurround.com/news/Astoundsurround-Ceo-Video-Interview-At-Ces   Not original link I found it on, but is there.   Very similar to surround sound processing for dual speaker and headphones...