French conductor, composer, and percussionist, Diego Masson was born in Tossa de Mar, Spain. He studied piano and composition at the Paris Conservatoire. Upon graduation, he joined the Domaine Musical as percussionist and began studying conducting with the group's director, Pierre Boulez. In 1966 he formed Musique Vivante, a group specializing in contemporary music. Musique Vivante has introduced many important compositions by French and foreign composers, in particular the music of Boulez and Karlheinz Stockhausen. In 1969 Masson conducted the world première of Stockhausen's Stop, which is dedicated to him. In addition to conducting specialist new-music groups like the Asko Ensemble, Xenakis Ensemble, the Composers Ensemble, Klangforum Wien, the London Sinfonietta, Ensemble Alternance, Ensemble Modern, and Musik Fabrik, he has worked with major orchestras including all the BBC Orchestras, Berlin Symphony Orchestra, Stavanger Symphony, Orchestre Philharmonique de Radio France, among others. He is also an acclaimed conductor of opera and ballet. He was music director of the Ballet-Théâtre Contemporain of Amiens and of Marseille Opera. His activities as a composer and arranger were mainly from the early part of his career and included film scores.