I cannot figure out how to connect my pc to stereo receiver in order to stream audio. I am on my second audio/video receiver, which replaced an older stereo receiver. Currently using a Harmon Kardon AVR154, which I imagine is new / good enough for no need to convert digital-to-analog, as it is a digital receiver. I have tried connecting both audio composite cables and digital coaxial cable from the pc internal soundboard, an ASUS M4A785-M, with an added S/PDIF module connection. Do I need to upgrade the pc with an additional internal audio card?

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