Thanks for the replies. In Windows, 5.1 is the highest I can select yet in the SBX panel if you drag the surround slider to 100% the display suggests a 7.1 setup. Actually at the default 67% it seems to suggest a 7.1 setup as well but with less emphasis on the rear 2 speakers (?). It would be interesting to know how this all works together. HCPlayer: DS3 was the game I was testing this out with as well. I have Windows and DS3 set to 5.1 and SBX set to 67% and note very good positioning. Better I think than having it set to 100%. I need to play around with this a bit more.