Windows 10 Sounds system, HDMI Optical and analog audio *
I have been using a SONY STR-DN860 via HDMI for the audio connections from a Windows10 PC and the picture to my 4K Monitor using is sent via a Display Port cable. The DP connection is using 4:4:4 so I get a very good picture. I find HDMI sub standard, colour depth for DP is 10 bpc and HDMI 8 bpc. My AVR does not have DP connections. This works well for me but has some drawbacks. With HDMI and DP video from my GPU (AMD RX480) Windows thinks I have two screens (which is fine), I don't need a second screen so I clone the two video outputs (via Windows) and I can forget that. As DP is v1.2 it does not support HDCP 2.2, am waiting for DP v1.4 for a new monitor and GPU card which supports DP v1.4 but at present are very rare and expensive. I have also used Optical to AVR but obviously that has limitations. Not sure this helps you in any way but works for me for now. Windows 10 Sounds system.HDMI, Optical and analog audio connections Windows 10 HDMI Sound Connecting your PC or laptop