djmartins wrote:What does the volume control show?
There is a screen where you can adjust and even mute HDMI audio.
Open a core, hit F12 and then left arrow.
If you have audio adjust enabled a down arrow there will let you change the volume.
The volume control shows as full.
I've done some more digging and found:
1) Using a different cable to a different monitor (a TV in fact) results in arcade core sound working.
2) Using that different cable directly into my misbehaving monitor (with no HDMI splitter or speakers attached, just using the built in speakers) results in no sound for arcade cores. Console/computer cores continue to have working sound.
So, it would suggest the cable is fine, and that there's something odd about the monitor. But the confusing thing is that console/console cores all work. Is there something different about the way arcade cores send audio over HDMI that this monitor might be sensitive to?
Thanks for your help!