February 2021
One day, I started up my game and the audio was muffled.
The most I can suspect is that something went wrong when my friend played on his account on my PC and it reset my in-game settings and binds. But we used to share a PC and played on our own accounts often and never had audio issues.
Enemy sounds are almost non-existent, and the audio is off for gunshots/weapon skins/pings. I haven't changed any settings and am using the same headphones.
List of things I've tried and have not worked: (on both Steam and Origin)
+miles_channels 2 to launch options
Uninstalled and reinstalled game
Verified game files
Change config file speaker_num '2' -> 8 and back to 2 (since it didn't work)
Enabled Windows Sonic
Installed Realtek
Changed sample/rate & bit-depth
February 2021
I have reporting audio issues for a long time, few seasons now (with this account and on the other) they seem to not care about this at all. Yet if skin is broken, oh boy they will rush to fix that ASAP.