So I had a fluke incident where I was doing Trial Roulette, got the 6th Encounter in Stormblood(Kitty), and was still of course stuck with the sound issue. I guess in a fit of annoyance I shook my camera violently and it temporarily fixed my audio??? This isn't a blanket fix, even after no audio disruptions going into Normal Raid Roulette the sound issue came back like it never left when I entered Leveling. No matter how much I flailed the camera around in that dungeon, it may have only gotten a brief second of relief. I'm not sure if single encounters can be "fixed" with this ridiculous method across the board(Really doubt it), but its worth a desperate fleeting grasp if it can be replicated consistently.

This isn't a joke either, I don't feel like messing with people for no good reason but it happened for me and it could happen for you.