The word soundtrack refers to the musical score or soundtrack that accompanies a film or television show. Synonyms for this word include score, music, sound, or audio track. Other phrases used to describe the music used in film include "film score," "musical accompaniment," "background music," or "sound effects." In the world of music production, "sound libraries," "sample libraries," and "production music" are also used to refer to audio tracks that may be licensed for use in film production or other multimedia projects. Ultimately, these various terms all describe the same essential element - the music and sound that provides the backdrop to a visual medium like film or television.