His famous work is 4'33" where the performer will not play a single note, a silent musical piece. He was the modern Bethooven from the Classical era. John Cage, The Avant-garde Composer (September 5, 1912 – August 12, 1992) He was born as John Milton Cage, Jr. at Los Angeles, California. He was considered as one of the most influential American composer and was widely known for his avant-garde music. Avant-garde word origin means "advance guard" or "vanguard" from the army advancing in the battle. An avant-garde refers to people or works that are experimental or innovative, particularly with respect to art, culture, and politics.