Here are entered works on motion pictures that include audio as a central element. Works on sounds in motion pictures are entered under Sound in motion pictures.This heading is not used for individual films, which are entered under headings appropriate to the content, genre, and/or form of the film.
Here are entered works on the process of sound production by birds. Works on the calls or songs produced by birds are entered under Birdsongs. Musical compositions having birds as their subject are entered under Birds--Songs and music.