Toleda:
Per your suggestion based on another post in another thread ("Quick Fix: Z370/200/X299/ Series Kaby Lake Audio, Onboard and/or HD 6x0 HDMI"), I am posting here:
I am trying to get HDMI/DP audio on my Z370 Gigabyte Gaming 5 system (CPU: 8700k, BIOS version F6) running macOS 10.13.6 with an nVidia MSI GTX 1080 TI display adapter.
I have analog audio via AppleALC. But I can't get my HDMI/DP audio to work with the speakers on my Monitor. I know the monitor can output audio via HDMI (actually DP), because in Windows it works. I also use Lilu, Shiki, and Whatevergreen (latest version that support nVidia adapters).
The requested files, screenshots, are in the attached zip file.