Im having the same problem. After doing some digging I have found out that the problem is the sound card cannot play as many sounds as WoWs plays at the same time. Apparently each gun has its own firing sound and when you fire off a salvo the number of sounds played increases (not to mention there are other players firing etc etc). I guess each individual cannon having its own sound effect on a ship makes sense from an immersion perspective. Honestly, there should at least be an option to play only 1 or 2 sound effects when firing, not one for each cannon on your ship.
