Yes, it's Windows 7 Professional 64bit. As for the audio drivers, I'm using the one from Rampage 2 Extreme's SupremeFX X-Fi sound card.
I find it difficult to believe that Haali (or the codec) can only support up to 640 kbps audio sources, especially since BluRay is around for some time. I still think it's a setting that I'm missing somewhere...
