Course / Topic 13 of 14

Sound (Beyond the Image)

Sound is not cinematography, but no first-year student's picture of the frame is complete without it — sound and image are designed together, and half of what feels like "great cinematography" is often really the sound design supporting it.

The BasicsDiegetic vs. Non-Diegetic

Diegetic Sound

Sound that exists within the story world and that characters could, in theory, hear themselves — dialogue, footsteps, a radio playing in the room.

Non-Diegetic Sound

Sound added for the audience only, which characters cannot hear — the musical score, narration, or a sound effect layered in for emphasis.

Score vs. Source Music

Score is composed specifically for the film and is non-diegetic; source music comes from an in-world source (a jukebox, a car radio) and is diegetic.

Foley

Custom-recorded everyday sound effects (footsteps, cloth rustling, object handling) performed and re-recorded in sync with picture during post-production — named for sound artist Jack Foley, who pioneered the technique at Universal Studios starting in the late 1920s.

ADR

Automated Dialogue Replacement — re-recording an actor's lines in a studio to replace poor-quality production audio, synced to their lip movement.

Sound Bridge

Starting the next scene's audio slightly before its image appears (or continuing the previous scene's audio briefly into the new image) — smooths a cut and links two scenes emotionally.

Deeper DiveSound Design as Authorship

Sound editor and mixer Walter Murch — the same figure widely cited for his writing on picture editing — is equally foundational to modern sound theory, having coined the credit "sound designer" during his work on Francis Ford Coppola's The Conversation (1974) and Apocalypse Now (1979). Murch treats sound not as a supplement to the image but as an equal, sometimes dominant, storytelling channel — arguing that a well-placed sound can do narrative work a shot cannot, because the ear processes information differently (and often faster) than the eye.

Theorist Michel Chion introduced the concept of synchresis — the mental fusion of a sound and an image that occurs simply because they happen at the same time, even if the sound wasn't actually produced by what's on screen. This is the entire basis of Foley art: audiences accept a stalk of celery being snapped as the sound of a broken bone, or coconut shells as horse hooves, because the ear-brain system fuses sound to image far more permissively than viewers realize.

Why it matters: a cinematographer choosing to hold on a wide, quiet shot rather than cut to a close-up may be deliberately leaving room for the sound design to carry emotional weight instead of the picture — the two departments are in constant dialogue, not sequential, isolated stages of production.

Further Reading

  1. Audio-Vision: Sound on Screen — Michel Chion. The core academic text on synchresis and the relationship between sound and image, widely assigned in film-sound courses.
  2. In the Blink of an Eye — Walter Murch. Also directly relevant to sound design philosophy, given Murch's dual career as picture and sound editor.
  3. Motion Picture Sound Editors (MPSE) — a professional organization whose published interviews and "Golden Reel" award materials are commonly used for real-world sound design case studies.
  4. American Society of Cinematographers (ASC) — American Cinematographer frequently profiles the collaboration between cinematographers and sound departments on specific productions.