In this dissertation, I examine the work of Rogério Duprat as arranger for tropicalista songs and the way some of his musical arrangements dialog with the melodized words with which they were recorded in the late 1960s. As a mix of orchestral sounds, film music cliches, and sound effects, Duprat s arrangements give an audiovisual character to tropicalista recordings. As an experienced composer of serial, electroacoustic, computer, and advertising music, as well as theater and cinema soundtracks, Duprat employed his broad knowledge of Western concert music and Brazilian popular music in order to make audio references to diverse works and music styles interwoven into his arrangements. As a craftsman, he sought to understand and to answer the demands from song composers, singers, the record company producer, recording technicians, and other professionals that became collaborators of his arrangements. His arrangements were also influenced by agents such as John Cage, The Beatles, the concrete poets, and the composers, conductors and musicians of Música Nova, a São Paulo avant-garde group that was integrated by Duprat and the other arrangers for tropicalista songs.