Sound plays an important role in television drama by creating moods and signaling events. There are two main types of sound: diegetic sound, which comes from within the world of the story, and non-diegetic sound, which comes from outside the story world, such as music. Both types of sound are used to create realism and manipulate the audience's emotions. Theme tunes are also important as they establish the mood of the show and act as an audible cue that the program is starting.

1. AS Media Studies: TV Drama Sound: Micro Elements