So they played 78 hours worth of music scattered about during the whole day, but, no one heard 78 hours of music in that one day. That wouldn't be possible. Don't they do that in all the parks everyday anyway? Not necessarily the same music but I have never been there when different lands didn't play different music continuously divided up by queue, preshow, show, exit and just area music specifically for the area you happen to be in!
This isn't rocket science.