フランツ・シュミット
From the 1950s, Langevin focused on classical music, symphonic music, and writing. Specifically, he wrote articles, monographs and books about Anton Bruckner, Franz Schubert, Guillaume Lekeu, Albéric Magnard, Joseph-Guy Ropartz and Charles Koechlin. He was also interested in works by Hugo Wolf, Gustav Mahler, Arnold Schoenberg, Franz Schmidt, Ferruccio Busoni, Leoš Janáček and Carl Nielsen.