Okay, so suggested sound issue. I have Dolby Atmos running on a 5.1 surround headset. No other known sound softwares running.

I will go through the fixes on here https://forum.faforever.com/topic/4084/solutions-for-snd-error-xact-invalid-arg-xact3dapply-failed

Will update on here if something works for anyones future reference to this issue.