ping211

While playing zombies some times I get audio problems at some point during the game. Basically the sound cut's out for the character voices, (including George Romero) I can not hear the secret song when activated and I can not hear the sound when a new round begins. other than that it seems like all the other sounds work correctly. It doesn't happen every time I play and if I exit back to the main menu and then do a new game of zombies the audio is fine. Has anyone else experienced this? Thanks