Finally able to get back into the game. I tried both this and setting the rate to 16-bit 44100. Nada. Still horrible stuttering during any combat (not just expansion so I can't even go play in old world) and stuttering in the music. I don't dare progress MSQ because I won't be able to get through the cutscenes without stuttering.

Login queues and disconnects I was prepared for, but this has pretty much killed my Endwalker hype. Sound is very important to the experience of the story.