Here are my own observations:
The first time the bug occurred it was after about 2 hours of playing. Going to the main menu and back into the game (with saving) got the sound back just fine but than I had two large freezing moments (about 1 min). It happened twice more, once it corrected itself the other time I had to go back to the main menu again.
I think it has something to do with a corrupt sound (like the children's bike sound) that causes the sound to go off. This could be anything really from a jingle to a song to a sound effect.
I've updated my graphic drivers today, my sound card drivers seem up-to-date.
I have this: IDT High Definition Audio CODEC on a HP computer, was not logged in and noticed the singer have no sound. Did not check the rest. Vanilla game with Store Content.
