Prior to this I only experienced one crash the first time I ran the client after booting my PC, after which subsequent loads would run and play perfectly. Don't ask me why. Now however, the 64-bit client is unusable due to persistent sound glitching.
Music frequently cuts out. Dialogue stops playing or replays previous track for the wrong page. Weird whooshing sounds randomly make me go deaf. Water flowing sounds get choppy and completely random sounds keep popping in for no reason.
Also the game itself is incredibly "clunky." I get good FPS, but randomly there are these weird "clunks" sort of like when a character is rubberbanding only with the whole world. Ping is good at ~92ms solid.
No other settings have changed.