i have a brand new samsung tv with a digital audio output, my bose surround sound only has the rca connection....is there a converter for this or is my 900 dollar surround sound useless ?
Well, you can get a converter (http://tinyurl.com/4meqjmd)
but it will cost you $40-50, and has a wallwart that you need to plug in. Plus it only gives you 2 channels of analog out to RCA female plugs. At least one of these says specifically it will NOT handle Dolby Digital.
You should have an AV receiver to run all this through, there are some good budget models out there from Denon, Yamaha and Sony. Denon seems to have the best upconverters if you watch a lot of non-HD content and you have an HDTV.