L-cut

An L-cut (named for the L-shape the audio and video tracks form on the timeline when viewed from above) is a split edit in which the picture cuts to the next clip while the audio from the previous scene continues. The viewer is already looking at Scene B while still hearing Scene A. The sound "overlaps" or "lingers" beyond the visual cut, creating a bridge between the two scenes. Eventually the audio from Scene A fades or ends, and Scene B's audio takes over fully. The technique is the temporal mirror of the J-cut — where a J-cut leads with sound, an L-cut trails with it.

L-cuts are extraordinarily common in professional editing, though audiences almost never consciously notice them. In an interview-based documentary, an editor might cut from a question being asked to a shot of the relevant environment or archival footage, while the questioner's voice continues from the previous shot. The audio establishes the context for the new image, giving the viewer a clear relationship between what they're hearing and what they're seeing. In drama, a character's dialogue might continue over a cut to another location, linking the two spaces through sound even as the picture moves.

In practical terms, the L-cut solves a specific problem: when the audio of an outgoing scene is interesting but the picture isn't, or when the next clip's picture provides context that makes the continuing audio more meaningful than it would be on its own. Used alongside J-cuts, L-cuts break up the rigid audio-visual synchrony of straight cuts and create an edit that flows with the naturalism of experienced cinematic storytelling. A timeline built entirely from straight cuts where both audio and video change at every cut sounds choppy and abrupt; a timeline that uses J-cuts and L-cuts intelligently sounds like a continuous, coherent experience.