All of your sources should be plugged in to the receiver, which then splits out the audio and video, does its processing and sends the appropriate signal to the appropriate device (speakers, display).

If you are talking about the wire to the speakers, that is the same old amplified analog signal used by stereo. Its just more channels. Nothing special is needed.

Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!