A character speaking direct to camera is an example of diegetic sound.

Name: A character speaking direct to camera is an example of diegetic sound.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Diegetic sound originates from within the film's world, such as characters talking to each other. A character speaking directly to the camera is often considered breaking the fourth wall, which doesn't change the nature of the sound being diegetic, as it's still originating from the story's world.

A Character Speaking Direct to Camera Is an Example of Diegetic