In der Heimat

Sound is used extensively in filmmaking to enhance presentation, and is distinguished into diegetic ("actual sound"), and non-diegetic sound:
* Diegetic sound: It is any sound where the source is visible on the screen, or is implied to be present by the action of the film:
o Voices of characters;
o Sounds made by objects in the story; and
o Music, represented as coming from instruments in the story
o Music coming from reproduction devices such as record players, radios, tape players etc.
* Non-diegetic sound: Also called "commentary sound," it is sound which is represented as coming from a source outside the story space, ie. its source is neither visible on the screen, nor has been implied to be present in the action:
o Narrator's commentary;
0 oound effect which is added for dramatic effect;
o Basic sound effects, e.g. dog barking, car passing;
o Mood music; and
o Film Score
Non-diegetic sound plays a significant role in creating the atmosphere and mood within a film.