IM running windows 7 64 bit media centre with all my media on the pc. What's the easiest and most straight forward way to playback 5.1 dts hd via an Mkv movie file? I've spent hours on previous installs trying to get this to work, eventually do, but don't know how! I had it working well, decoding all my movies, BBC hd, itv hd all through hdmi. I've installed the wmp codec pack, but no joy!