sound in film

SOUND
Diegetic sound 

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Sound whose source is visible on the screen or whose source is implied to be present by the action of the film: 

• voices of characters 
• sounds made by objects in the story 
• music represented as coming from instruments in the story space ( = source music)

Diegetic sound is any sound presented as originated from source within the film's world 

Digetic sound can be either on screen or off screen depending on whatever its source is within the frame or outside the frame. 

1.  title music -music played during the credits at the beginning or end of a television programme or film.
2. 
   
3. score/incidental- happening or likely to happen in an unplanned or subordinate conjunction with something else. incurred casually and in addition to the regular or main amount:incidental expenses. likely to happen or naturally appertaining
4. 
   
5. sound motifs- A theme is usually defined as a message, statement, or idea, while a motif is simply a detail repeated for larger symbolic meaning. In other words, a narrative motif—a detail repeated in a pattern of meaning—can produce a theme; but it can also create other narrative aspects.

sound effects -a sound other than speech or music made artificially for use in a play, film, or other broadcast production.

voice over- piece of narration in a film or broadcast, not accompanied by an image of the speaker.

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Non-diegetic sound  Sound whose source is neither visible on the screen nor has been implied to be present in the action:

• narrator's commentary
• sound effects which is added for the dramatic effect
• mood music

Non-diegetic sound is represented as coming from the a source outside story space. 

The distinction between diegetic or non-diegetic sound depends on our understanding of the conventions of film viewing and listening.  We know of that certain sounds are represented as coming from the story world, while others are  represented as coming from outside the space of the story events.  A play with diegetic and non-diegetic conventions can be used to create ambiguity (horror), or to surprise the audience (comedy). 

synchronous- existing or occurring at the same time

sound effects- a sound other than speech or music made artificially for use in a play, film, or other broadcast production.

dialogue- a conversation between two or more people as a feature of a book, play, or film.

ambient sound- relating to the immediate surroundings of something.