This seems to be a strange recurring problem for most VirtualBox users. You install an XP guest and soon you realize the sound doesn’t work. You install the latest audio drivers from Realtek and boom goes the guest with a BSOD.

The work around is simple. You should install an older version of Realtek drivers. The 2004 set works great. You can find the drivers here.

http://cid-0d5aec64d9ff3d13.skydrive.live.com/self.aspx/Realtek%202004/Realtek2004.rar

enjoy your music!