Diegetic sound comes from within the scene, like dialogue, while non-diegetic sound comes from outside the scene, like narration or mood music. Synchronous sound is recorded at filming and matches the action, like footsteps, while asynchronous sound occurs naturally but is not precisely synchronized. Sound effects, motifs, bridges, dialogue, voiceovers, mixing, and perspective are all techniques used to enhance meaning and storytelling through sound in television and film.