Campo studied at the Madrid Conservatory and served as a violinist and violist of the symphony orchestra of the Teatro Real. He took a position at the Madrid Conservatory in 1915 and became the most important professor of composition in Spain at the time. His compositional interest lay in the German style, making use of the Wagnerian models of unending melody and leitmotif. His dramatic and orchestral works are often an effort to reconcile these German tastes with his Spanish heritage, as in his opera El Avapiés (1918), written in collaboration with Angel Barrios. ~ Lynn Vought, All Music Guide