There are many synonyms for the phrase "provide a musical setting." Some of these synonyms may include "accompany," "musically enhance," "compose music for," "set to music," or "create a musical backdrop." All of these phrases describe the act of adding music to a piece, whether it be a song, film, or performance of some kind. Musicians and composers use these techniques to enhance the emotional impact of a piece and to create a cohesive and impactful overall experience. Choosing the right synonym for "provide a musical setting" depends on the type of piece you are working with and your desired effect on the audience.