I'm already using HDMI for 7.1 uncompressed PCM. I need to configure my receiver as an extra display just so an audio signal can piggyback off it. Thus, my desi

I'm already using HDMI for 7.1 uncompressed PCM. I need to configure my receiver as an extra display just so an audio signal can piggyback off it. Thus, my desire for a simple USB connection. I'm pretty sure my motherboard has SPDIF optical out, but SPDIF would be a downgrade since it only supports compressed 7.1 or uncompressed stereo.