I'm thinking of getting a mac mini, which only supports 5.1 sound using its optical connector. My speakers don't take optical audio - just six channels of analog audio. I'd like to ask how to get around that, but it doesn't seem to fit on serverfault, stackoverflow or superuser. Where would I ask about home audio setup?
For future reference, you can now ask these kind of questions on the Audio Recording and Production StackExchange site.
You might get results at Super User, but be prepared for it to be closed.
For a while you might be better off posting on
home4film.com which was a Stack Exchange (1.0) site, but it's long since gone.
I would suggest a home theater or AV forum, like this one.