Is it possible to listen to existing audio that is part of a movie while recording narration intended to play at the same time (e.g., singing lyrics to music that is already part of the video)?  I can't seem to find a way to unmute the audio during video playback while recording narration. I would listen using headphones, with the computer's speakers at zero volume. I am using Windows 8.1 and MovieMaker 2012. Thanks.