"Lip Synch" redirects here. For the American musical comedy television program, see Lip Sync Battle. For the film series, see Lip Synch (series). For other uses, Lip Sync (disambiguation)

Lip sync, lip-sync, lip-synch (short for lip synchronization) is a technical term for matching lip movements with pre-recorded sung or spoken vocals that the listeners hear through speakers, either through PA system speakers in a "live" performance or television or cinema speakers in the case of a lip-synced TV show or film performance. The term can refer to any of a number of different techniques and processes, in the context of live performances and recordings.