PurpleAngel
Headphoneus Supremus
Some motherboards come with S/PDIF (optical/coaxial) connection, but does not come with the backplate or optical port.My computer has no optical out. My motherboard before had it, but not this one. Big mistake.,
As far as I can tell my Denon is not sending video of any kind, since it had an accident, I was moving from São Paulo to Maceió and the moving truck tumbled over. And even if it was fine, I doubt its HDMI out could send HDMI 2.1 signal. It's only HDMI 1.4a, just checked.
https://www.avforums.com/threads/denon-avr-3313-hdmi-4k.2017714/
https://www.amazon.com/SPDIF-Optical-Plate-Bracket-Gigabyte/dp/B07FJMD7BF