Sound design is a key part in the making of a film. Here are all the different types of sound design in the world of film.
Diegetic sound: sound that purports to come from the world of the film. This includes: sound recorded on set and the use of foley effects (this is everyday sounds separately recorded, which is then put into the film). The most common form of diegetic sound is dialogue. A way dialogue is also recorded is through the process of ADR (additional sound recording).
Non-Diegetic sound : sound added in post-production to have an effect on the audience. Two examples of non-diegetic sound is a composed score (music composed for the film) and compiled score (songs which already exists but, is then put into the film). Examples of composed scores are movie themes (‘Star Wars’, ‘James Bond’ etc etc) and “stings” which is audio punctuation (for example, in ‘Kill Bill’ when the alarm-espque sound is played). A narration/voice over also fits this category (for example, direct address is when the narrator addresses the audience).
Sound bridge: where the soundtrack from one scene continues to the other scene.