Sound in movies is a lot more important than some would think. Sound creates a mood and adds an edge. Without sound you couldn't hear the emphasis in and actor's voice in an evolving or climatic scene. Sound also brings out emotion such as that always suspenseful music they use in scary movies to let us know something's going to happen. So sound can foreshadow or even tell the story. Sound covers anywhere from vocals to music. An upbeat song might let you get in-tuned to the film and allow you to enjoy yourself, but when it comes to slow dramatic scenes they will use slow, often classical type scores. Sound can be used to make us laugh, or on the edge of our seats. The power of sound in movies is underestimated. Sound can be created on set or off. Most movies actually call for the actors to do voice over because the lines were to quite or other circumstances. Movies actually have crew members that make the sounds for movies using ordinary every day objects. The do such things as hit sides of beef for punching noises. I mean we could always go back to videos with no sound at all. Next time we watch a movie take the time to notice the audio, or cover your ears and see how it would be without it.