Here is a post about how you can completely disable all sound:
https://forum.faforever.com/topic/2605/crashes/21?_=1646945847685
The reason for doing that is so you can test whether the game will crash when all sounds are disabled. If your game stops crashing, that means the crashes are definitely caused by sound issues. You will at least know that you are not wasting your time by trying to fix a sound problem.
There are a lot of different things in a computer system that could cause sound problems. It's not just your sound card and your headphones.