This concert from London's Barbican features the music of composer, writer, artist and mushroom expert John Cage, one of the most extraordinary artistic figures of the 20th Century.In this concert, performed by the BBC Symphony Orchestra as part of its annual Composer Weekend, we hear music by some of the giants of American music including Aaron Copland, Charles Ives, William Schuman and Henry Cowell, who was a major influence on Cage.There are two pieces by Cage himself, The Seasons and the work for which he is infamous - the silent 4'33".