This document discusses different types of audio that can be used in media. It begins by listing common audio categories like dialogue, effects, and music. It then discusses how these audio types are used across various media sectors such as broadcast, film, games, and more. Specific examples are provided from movie trailers to illustrate how different sounds create certain moods and purposes. Recommendations for audio in children's books emphasize using a calm voice and background music or sound effects to enhance the listening experience.