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- The dialogue editor examines every line of spoken dialogue, listening for badly recorded lines (too quiet, too loud, jarbled, et cetera) or times when an actor's voice is out of sync with his lips.
- Sound effects designers look for places where they'll need to add ambient background noise (honking cars in a city, tweeting birds in the country), and "hard effects" like explosions, doors slamming and gun shots [source: FilmSound.org].
- Foley artists look for places to fill in details like footsteps across a wood floor, a faucet running, the sound of a plastic cup being placed on a marble countertop, et cetera.
- The music editor looks for inspiration to either commission original music or buy licenses for existing song use.
- The composer, if he's already hired, looks for places where original music would add to the on-screen moment.