I just ran into a weird glitch. I played this game many times but this is my second playthrough with patch 9.
Basically at random points in the game, usually after conversations, the music and the environmemtal soundeffects stop playing and don’t come back even after the end of the conversation.
For example I ran into Edowyn and his siblings, and after the tadpole scene the sound was gone. The voicelines still played, Tav’s lines played fine when I clicked on them and when I entered to owlbears cave the conversation played just fine, but no other soundtrack, no music, no water dripping, nothing… i tried to reload a few times and still nothing, went to the Main Menu and there was no music there either. I had to reload the game completely and then the sounds did return.