Experimental music is a compositional tradition that arose in the mid-20th century, particularly in North America, of music composed in such a way that its outcome is unforeseeable. The American composer John Cage is seen as one of the more notable composers associated with this music . In France, as early as 1953, Pierre Schaeffer had begun using the term "" to describe compositional activities that incorporated tape music, musique concrète, and elektronische Musik. Also, in America, a quite distinct sense of the term was used in the late 1950s to describe computer-controlled composition associated with composers such as Lejaren Hiller. In 1958, Hiller became the first director of the Studio for Experimental Music at University of Illinois at Urbana-Champaign.