Might just be me being new to Mumble, but I am trying the 1.16.5 release and positional audio is working, but not distance. I have positional audio and link to game and transmit position checked in Mumble.

As a note I cannot find Forge logs (though I do have it and am running it), but I do see other logs saying Mumble linked but I do not see it in chat on the server.

Ah realized it was not setting minimum distance.

As a note I cannot find Forge logs (though I do have it and am running it), but I do see other logs saying Mumble linked but I do not see it in chat on the server.

It seems to prompt the text while you are loading in. If this takes a bit of time the chat message will not "show anymore". You should be able to see it in the chat log. Simply try typing a message and it should show.

It's always a good idea to check the Mumble client too.

I use the start up option in the Minecraft launcher to get log details while the game is running.

Ah realized it was not setting minimum distance.

Thanks for posting your solution!