I can't believe this is the last post for 2012. So, an explanation of this puzzle is in order. As someone pointed out, you may have thought there was an audio problem since you couldn't hear anything. Sorry, that was actually the hint - it was silent. That was to differentiate it from the other Christmas song "O Holy Night". The correct answer for this puzzle is "Silent Night, Holy Night". Certainly wasn't the least punniest puzzle I've ever done.
What in the World
Linguistic Illusions to challenge adults and children.