Dubbing, or re-recording, is a post-production process used in film making and video production, in which additional or supplementary recording occurs after the original recording stage. The term “dubbing” most commonly refers to the replacement of the voices of the actors shown on the screen with those of different performers speaking another language. The process includes automated dialogue replacement (ADR), also known as additional dialogue recording, in which the original actors re-record and synchronize audio segments. Music is frequently subject to the dubbing process in the post-editing stage of a film or TV show..

Automated dialogue replacement, or additional dialogue recording (ADR), is the process of re-recording dialogue by the original actor after the filming process to improve audio quality or reflect dialogue changes (also known as “looping” or a “looping session”). ADR is also used to change original lines recorded on set to clarify context, improve diction or timing, or to replace an accented vocal performance; a production sound mixer records dialogue during filming. Accompanying noise from the set, equipment, traffic, wind, and the surrounding environment often results in unusable production sound. During post-production, a supervisingsound editor, or ADR supervisor, reviews all of the dialogue in the film and decides which lines must be re-recorded. For animation, such as computer-generated imagery or animated cartoons, dialogue is recorded to match a pre-edited version of the show. Although the characters’ voices are recorded in a studio, ADR is necessary whenever members of the cast cannot all be present at once.

ADR is recorded during an ADR session, which takes place in a specialized sound studio. The actor, usually the original actor from the set, views the scene with the original sound, then attempts to recreate the performance. Over the course of multiple takes, the actor performs the lines while watching the scene; the most suitable take becomes the final version.]

Technicians have overcome some of the problems associated with dubbing using new technology. An application Video Rewrite, uses computer animation to match lip movements with the new voice track. In a video clip made using this technology.