I've searched the the web and this forum but can't come up with a solution to my problem. Using a full version of WinDVD 6 I had no problem in using the S/PDIF passthough to get 5.1 to my Amp however when playing a DVD through MCE it only comes out in 2-Channel. On checking the Audio settings in MCE a WinDVD screen pops up but the S/PDIF is greyed out and not selectable. I then installed teh trial of WinDVD 7 (long story short - crashed on install, killed all dvd players since.. so did a format) So now on a fresh install and I've tried the NVIDIA PureVideo Decoder but still no 5.1 S/PDIF passthrough although it is set in the MCE settings. Yesterday when playing through WinDVD 6 I had to select the 5.1 audio stream manually as that seemed to default to the 2-Channel.. but there doesnt seem to be anyway of changing audio streams via MCE as you would do on a normal DVD player. Can anyone help me? Its an Asus Pundit R300 with SoundMax Digital Intergrated audio (S/PDIF to SONY Amp) and as I say can get it to work outside of Media Center. Also tried the NVIDIA reg fix which as suspected didnt to anything as its for analogue.