Guy Gaston Simon Deplus, known as Guy Deplus, was a French clarinetist born on August 29, 1924, in Vieux-Condé. He studied at the Conservatoire national de musique et d'art dramatique de Paris, earning first prizes in clarinet and chamber music. Deplus joined the Garde républicaine in 1947 and became its principal clarinettist by 1964. He played with the Orchestre des Concerts Colonne from 1950 and was a founding member of the Octuor de Paris in 1965. Deplus also taught at prestigious institutions, including the École normale de musique de Paris - Alfred Cortot and the Conservatoire national supérieur de musique de Paris. He performed worldwide with notable conductors such as Pierre Monteux and Seiji Ozawa. Notable recordings include Concerto by Mozart and Quatuor pour la fin du temps by Olivier Messiaen. Deplus passed away on January 14, 2020.