Non-diegetic sound is typically added in which stage of production?

• A. On set during filming
• B. In the initial script
• C. During pre-production planning
• D. Postproduction

Answer: (D)

Non-diegetic sound is sound that does not originate from within the film’s world—things like the musical score or a narrator’s commentary that characters inside the scene don’t hear. Because it sits outside the world of the characters, it’s not typically recorded during filming. The actual creation and integration of this sound happen in postproduction, after the editing is done. In post, composers score the scenes, sound designers craft mood-enhancing effects, and the final mix balances these elements with dialogue and on-set sounds. While planning and notes in pre-production can indicate where music or narration should appear, the hands-on addition and synchronization are done during postproduction. On set, the focus is on capturing diegetic sounds that the characters hear, not the non-diegetic elements that guide emotion and pace in the finished film.