2012-12-09, 00:05
To my biggest surprise, I suddenly do not have this issue anymore. I am not sure what fixed it as I recently upgraded to Windows 8 (+ 12.10 Catalyst for my 6570) and I also upgraded my old build from February to Frodo ~b2 (the build in my sig). Hardware is 100% the same as before. Audio sync is now spot on without any trickery.