I am using the Skystar 2 DVB-S card from Technisat. The Software which renders the TV shows is ProgDVB. It is a free and very good program with good plugin support. Now I was a bit unhappy, because there are several channels which also support AC3 stream. The filters which were already there somehow don’t support the s/pdif Out. I need the s/pdif because I use the Creative Inspire 5.1 Digital 5500 which has a coax digital in and the s/pdif in – so it doesn’t support analog Dolby Surround at all.
So I searched around and found the AC3 Filter which is a great tool.
After installing the filter, restart ProgDVB and after starting it again select a channel with AC3 stream. In File -> Porperties you can already find the newly installed AC3 Filter. Select it and change the settings as you wish.
And now enjoy Dolby Surround