This is probably a simpler suggestion than you're after, but I got this advice on 3dsoundsurge.com. They said to leave the bass/treble level in the surround mixer (if you're using an audigy) at 50% and to put the master volume in the mixer one notch below 100%. They said that speaker volume control and in-game volume levels are a matter of taste. Also, they said to leave the bass redirection setting in surround mixer/speakers/settings off, which I think is the same as large speaker support. One annoying thing about the 560's that I noticed on my set was that on low volume levels the balance is off-set to the right but when I turn it up it evens out - so I adjust the balance depending on how loud it's set. Hope this helps.