Why is music so important to radio? This anthology explores the ways in which musical life and radio interact, overlap and have influenced each other for nearly a century. One of music radio's major functions is to help build smaller or larger communities by continuously offering broadcast music as a means to create identity and senses of belonging. Music radio also helps identify and develop musical genres in collaboration with listeners and the music industry by mediating and by gatekeeping. Focusing on music from around the world, discusses what music radio is and why or for what purposes it is produced. Each essay illuminates the intricate cultural processes associated with music and radio and suggests ways of working with such complexities.