From the Nvidia 3090 HDMI cable to the Arc input in the BP50. BP50 Is set on the Optical channel which has output sound before. I usually get my audio from the Display Port output to the Monitor speakers. I do have a DP to HDMI female and using that doesn’t change the scenario. Yes, Nvidia drivers have been updated; they update each month.
In the NVidia control panel, the HDMI audio outputs are all greyed out; same with the sound settings in Windows 11…Any ideas?