Unlike his children's television scoring contemporaries, Raposo exhibited an uncommonly broad grasp of compositional styles. Raposo was classically trained as a conductor and at the École Normale in Paris as an arranger. As a student of Nadia Boulanger in Paris, he extended his facility in piano technique. This classical background gave him the ability to engage different music genres authentically. So diverse were the genres he regularly frequented, that often the only identifying mark of his songs as "Raposo" were common lyric allusions to "sunny days" or "flying", or his signature use of piccolo and glockenspiel atop the melodic or contrapuntal line, as well as the prominent uses of guitar in the rhythmic line.