I'm running Vista Ultimate 64 natively on my Mac Pro (2008 model) and everything works perfectly except for an annoying audio problem.* I have read a number of posts on this topic across the Internet, but I can't find a solution. I have all the software up-to-date, new bootcamp drivers have all been installed in Vista, all firmware updates, etc. If I run the default audio drivers in Vista, the system recognizes my external speakers (Bose MusicMonitor) but the maximum volume output is only 10% of what it should be.* All settings have been adjusted to maximum. If I install the new Realtek HD audio drivers, the system doesn't seem to recognize the external speakers and audio only comes out of the internal speaker.* Moreover, the Realtek audio manager (in the system tray) shows red which I think indicates a problem (vs. showing green). I really don't know what to do?* Could this be something with the EFI / emulated BIOS system that Intel based Macs use? Has anyone out there been able to fix this problem?* Are there others that have the same problem as I do?* My searches on the net indicate I'm not alone.* Thanks for your help.*** MacTulsa.