Putting my 2 cents in as well... I know there was some discussion that it might be related to older parts but I just got this PC and am experiencing the same issues.
The issue started for me the FIRST mini-boss during the first EW dungeon. The audio cut out completely, and I was able to get it half back by setting the equalizer to standard (it was set at logitech initially)-- however, my battle effects were gone and anytime I pressed a skill action I'd hear an annoying clicking. The MSQ lacked voice acting as well and it's incredibly frustrating as other fixes suggested in the thread have done nothing to help.
As it is, I can only get BGM and some system sounds-- but even the BGM will pop every so often. This isn't playable. I was so ready to enjoy this expansion fully but after spending a week in queues to get another barrier I'm not sure I'll even try to play for a while.
My PC:
GPU: NVIDIA GeForce RTX 3070
CPU: AMD Ryzen 5 5600x
OS: Win 10, latest updates
EDIT: I relogged the next day just to see if it got better and I haven't had the issue since-- the only change I've made is not using my headphones, and keeping the sound settings to CD quality.









