There’s some sound fix available through the World of Warcraft launcher, I guess: “Tools Hotfix 12/12/06”. There’s a link in that thread for the manual fix, which may or may not help with post-patch framerate issues. I haven’t played Warcraft with sound enabled since December 2004, although I did run the Burning Crusade with sound for a few days until that damn cello music in the Blood Elf noob areas drove me to drink. I actually think the sound in Warcraft is done quite well, but enough already.