Karlheinz Stockhausen - Klavierstück XI

Klavierstück XI, for piano (1956) Herbert Henck, piano Karl Stockhausen’s Klavierstück XI (1956) was the composer’s first essay in a large-scale “open“ form--that is, one in which the overall structure is not fixed prior to performance. While Stockhausen made novel use of such techniques, such formal experiments find their roots in the music of composers like Henry Cowell, John Cage and Earle Brown. Cowell’s 1935 Mosaic Quartet, for example, allows the performers to decide the order in which the movements