Hi all, I have a win10 PC that i'm using to watch movies. I use plex with that. I have the PC connected to my Denon 7.1 AV receiver. If I buy this audio card, how do I connect it to my receiver to get the 7.1 audio? Right now I have my PC connected to the receiver using an HDMI cable. But this card doesn't have an HDMI port. If I use the SPDIF port, will not that limit me to only 5.1?