>Much of the sound we hear in a typical movie is either created or substantially altered in post-production. If the sound were simply recorded along with the pi

>Much of the sound we hear in a typical movie is either created or substantially altered in post-production. If the sound were simply recorded along with the picture and left at that, the microphone would pick up too much background noise and not enough dialogue. An engineer therefore adjusts the intensity of the audio at different frequencies, adds or filters out ambient sound, and introduces a subtle amount of reverb, so the sound matches the spatial environment shown onscreen. That's not the half of it. For many scenes and pretty much every scene outdoors, they use ADR, which means the actors went into a studio and recorded their lines dubbing over their lip movements on film. Not to mention foley artists recreate every footstep, door open/close, etc - very little of that is natural in a hollywood film.