Home theater Setup?

Ok, so I finnally financed my home theater project… costing a total of ,000 thousand dollars. That included a nice projector, seats, nice sound system and sound proofing / acustics for the room in question.

However, now I am completly un-aware of how to get everything to work. I have a Sony 1080×1980 prodictor, 3 yamaha 5.1 channel Dolby receiver (for a total of 18 speakers) and a powerful MAC pc to run the multi-media from. All of my content is going to be played from the computer…. I know how to wire the video part, but the audio is what gets me. What CORD do i run from my computer to my Dolby receiver (whats it called, does it require a special card in the computer?) and how do I inter-connect all 3 receivers to get the same Dolby signal from the computer? just link all 3 together? or link each one seperatly from the computer?

Thanks for the help!

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