>>283696530
I couldn't get mine to work for ages. It's a pain in the ass because you have no indication that it's working and need to ask other people in-game.
Microphone app permissions needs to be turned on but probably already is if it works in other games. I think Pavlov needs the Rift mic set to default communication device in windows sound control panel, that could be the issue. Also the mic volume needs to be high because Pavlov voice is very quiet.