John Cage: Music of Changes - Book I. John Cage's 4'33". John Cage "4'33" 4′33″ Conceived around 1947–1948, while the composer was working on Sonatas and Interludes, 4′33″ became for Cage the epitome of his idea that any sounds may constitute music. It was also a reflection of the influence of Zen Buddhism, which Cage studied since the late 1940s.
In a 1982 interview, and on numerous other occasions, Cage stated that 4′33″ was, in his opinion, his most important work. The New Grove Dictionary of Music and Musicians describes 4′33″ as Cage's "most famous and controversial creation". History of composition