When I started this old version of wow, every sound had this repetitive echoing effect. I’ve searched for maybe an hour or two trying to find the solution until I actually found it here:
Basically, change “default-fragment-size-msec” in /etc/pulse/daemon.conf to a value of “5” … save…
then kill and restart pulseaudio (pulseaudio -k) (pulseaudio)
Now the sound in wow seem flawless.