A sound editor is a creative professional responsible for selecting and assembling sound recordings in preparation for the final sound mixing or mastering of a television program, motion picture, video game, or any production involving recorded or synthetic sound.

Sound mixers head up the department responsible for all the sound recorded during filming. This is predominantly dialogue but can include sound effects and atmosphere. Before shooting starts, they meet with the producer and director to discuss the best method of capturing sound alongside the director’s shooting style. They visit locations to check for potential sound problems, like passing trains or road noise.  During filming, sound mixers ensure audio from microphones is recorded at a good level for every take. If they flag up a problem, the director decides whether to do another take or correct it in post-production.