I went to a hifi-store the other day asking how to output all system sound from my mac mini via the toslink-to-coaxial connection and make the beosystem 1 to recognize all sound and not just dts/dolby.

I was told there was a software AC3-filter for pc that recoded all system sound to ac3 and that way I would not need any other connection

Unfortunately I havent succeeded in finding a comparable solution for mac yet

here is the pc-version which looks awesom, havent tested though:

http://ac3filter.net/projects/ac3filter/releases

Any ideas for the mac world?