From ray carter@3:770/3 to All on Thu Dec 24 16:30:18 2020
On two different pi's pi3 and pi4, after the latest round of updates, I
found that audio to hdmi did not work. After research, I found that pi os recently changed from alsa to pulseaudio. SOLUTION: replace the alsa
volume control on the panel with pulseaudio volume control and check that
HDMI output is selected. (mine was not on either pi)