Sound

Diegetic sound is 'realistic sound' where the source is visible on screen or where the source is implied to be present in the action even if the sound source is out of shot (e.g. a door slamming in another room or sirens in the distance) common examples of diegetic sound include: 

- Dialogue (characters voices)
- Sounds made by objects
- music coming from instruments shown on screen
- ambient sound (background noise that would be present)
N.B. this links to what we discussed last week in terms of TV Drama's needing to create a realistic believable 'diegetic' world for the viewer - sound is part of the verisimilitude.
Non-diegetic sound is sound where the source is not present in the action nor looks like it is meant to be; common examples include:
- Mood music
- Dramatic sound effects that do not match the sound anything on screen would make.
- Narrators commentary.

Non-diegtic

Title music: theme tunes (connote genre/represent TV drama).

Score/incidental music: orchestral music used to connote tone/atmosphere.

Sound motifs: sounds associated with certain character (often a villain like Darth Vadar in Star Wars) that connote something good/bad is about to happen.

Sound effects: used to connote atmosphere (used a lot in horrors, like in this example video).

Voice over: often used to give the viewer an insight into the thoughts of a character (creating a bond between the audience and character), set the scene or progress the narrative.

Diegetic

Synchronous sound: sounds that match what you see on screen.

Sound effects: realistic sounds that match the action on screen creating realism and/or connoting atmosphere e.g. gun shots, door opening/closing.

Dialogue: characters speaking (dialogue progresses the narrative and reveals the character's personality/views to the viewer). 

Ambient sound: natural background noise you would hear if the scene on screen were real - this is vital when creating realism.