Scores · Entry 03
Diegetic or not
The score that could be coming from a speaker in the corner of the room — and what that uncertainty does to a viewer.
The productive blur
Diegetic sound belongs to the world of the film: the radio playing in the kitchen, the band at the back of the bar. Non-diegetic sound belongs to us alone, the audience — underscore the characters cannot hear. The distinction is taught as a binary, but a composer working with texture rather than melody has something the orchestral scorer rarely gets: the ability to sit exactly on the line between them.
A sustained hum at 50 or 60 Hz could be the building's electrical wiring. A low creak could be the chair the protagonist is about to sit in. Surface noise from a shellac disc could be an old radio left on in the next room. None of these sounds announce themselves as score. The viewer's brain, trying to locate where sound is coming from, does not immediately file them under music and stop processing. They stay active, unresolved, slightly alarming — which is precisely the point.
This is the mechanism that makes texture-based scoring so effective in scenes that require dread without event. The viewer cannot relax into the conventional listener's posture, the one that says this is the soundtrack, it signals how I should feel. Instead the sound behaves like an object in the room, and the room feels wrong.
The technique is fragile in one specific way: if the texture is too clearly musical — if it has audible pitch movement, a recognisable rhythm, any quality that reads unmistakably as composed — the ambiguity collapses. The sound gets filed, the spell breaks. The restraint required is genuine. What works is material that could have been recorded rather than written: field recording passed through light processing, a bowed string held without vibrato, a room tone that has been shaped rather than generated. The edit is the composition, and the composition hides its own hand.
Filmmakers who use this approach describe the effect in terms of space: the sound does not push the viewer toward an emotion, it changes the room the viewer believes they are sitting in. That shift — from theatre seat to uncertain interior — is what diegetic ambiguity achieves that a cue marked tension, swell to cut never can. It works because it refuses to be identified.
