Sound

Diegetic/Non Diegetic Sound

Diegetic Sound: This is the natural sound you expect to hear in film (like birds or water running from the sink). Most commonly used for on&off diegetic sound in films. Diegetic sound is used creatively in horror, the audience hear a scream not shown in the shot and this is used to foreshadow horror and action that will follow.
Non Diegetic Sound: This is sound that has been added onto a film (soundtrack or voiceover). This is used largely in phone when the audience hear what the other person is saying but cannot see them.
Sound Bridges: Sound/music is continued into the next scene, without it a film would be disjointed and wouldn't have solid continuity between frames.
Parallel Sound: Music that matches the mood (happy music=happy action/scene)
Contrapuntal Sound: When the music infers a change in mood is about to happen, it illuminates a juxtaposition.