'No Sound Bug' Troubleshooting Assistance: What We Know And What Can Be Done About It

Patch 1.33 has been released. Please let me know if this patch resolves your no sound bug.

Also, the Updates & Announcements section has been updated with information from my conversation with an EA customer service representative.

ETA:
Don't forget to temporarily remove all custom content (does not include The Sims 3 store content, that is safe to leave in) and mods before updating your game. :)

For detailed instructions on what to do before updating your game, visit the link below.

http://www.thesims3.com/community/news.html?selMonth=2&selYear=2012#-1321973146