A professional who operates console to synchronize and equalize prerecorded dialog, music, and sound effects with action of motion picture or television production. Responsibilities include:

• Reads script and dupe sheets of film and tape or video tape to learn sequence of speaking parts, music, and sound effects to be synchronized and integrated in film or tape or video tape.
• Informs dubbing-machine operator to load sound tracks onto dubbing machine and motion-picture projectionist to place film in projector.
• Operates console to control starting and stopping of projector and dubbing machine.
• Observes film or video tape projected onto screen, listens to sound over loud speakers, and turns knobs on panel of console to balance intensity and volume.
• Informs motion-picture projectionist to project film onto screen.
• Observes projection and listens to determine that sound is synchronized and equalized with action on film.