I'm not exactly sure where to post this... Or what might be needed..server side logs, or even android TV logs...
I noticed about a week or so ago this problem, then updated to the beta Android TV, same issue, and now the server, same issue.
The audio "mostly" works, but when it starts to play it seems fine, however when people start to talk they are very very very soft, almost a completely to low frequency. To fix it oddly.. it take a bit of fast forward, rewind, back/forth, then all of a sudden it works. So I watch it. Pausing afterwards is fine, I have not tried again to fast-forward/rewind. More a pain, and not sure what the issue is. I know a while ago with a beta android TV update there were issues with no audio at all, from what I saw it was fixed, this seems similar, but weird that when people are talking are soft, while all other noise, music, even voice-overs sounds completely fine, just people talking (until I mess with fast-forward/rewind a bunch).
Attached is the latest emby-server log. I hope it helps. I believe the time starting is ~ 19:07:07.887 and remote IP 192.168.66.137 (android TV device)