Originally Posted by tornadog
in my control panel under playback devices, I have 3 options, speakers(disabled, unplugged), Digital out spdif(working,default) and digital hdmi(working). When I select hdmi I can chosee configure to set my speaker configuration but only shows stereo. When I select spdif, the configure option is greyed out. I tried playing a 720p mkv file which has 5.1 dts audio and i only get audio in the front Left and front right speakers. I run the same file using my laptop which has hdmi out and it plays on all speakers.
You can't set up your speakers as spdif means passthrough only. Spdif only outputs stereo unless the ac3 track has been decoded by software first.
Which playback program are you using? I'd recommend mplayer HC + ac3filter(remember to disable all internal filters and set your playback device to digital out).
How to properly set up media player classic: