The process takes stereo to 5.1, 7.1, or even 9. The company was founded by one of the original MP3 team and a former New England Digital guy (Synclavier, direct-to-disk, 1st hard disk recording system). I've got one in for testing from a company that still hasn't made it public. It's DSP-intensive and not something you could simply put together with a fancy mix desk in a DAW. The patent granting would indicate to me that it's a new approach. Re: above, it's not based on Gerzon or any of the other methods out there. It's head and shoulders above other methods I've heard.
It's one of those things I would have said probably could not be done before I had heard it. It works just as well for data-reduced files like MP3. It is fully patented (not just applied for), derived directly from the original mix (sums back perfectly unless you choose to further process/tweak), uses no steering, no delays or effects, and can actually place things discretely in each of 5 or 7 speakers, with no crosstalk, from a simple stereo source. I'm under NDA, so there's a limit to what I can say, but I could probably run a demo file through if you're interested.
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