Herbert Henck: Music of Changes, http://www.xs4all.nl/~gaud/biobak/c/cagej.htm

This cycle of piano music is dedicated to David Tudor and within Cage's works clearly represents, together with the Imaginairy Landscape No.4 for twelve radios (1951), a turning point - not, however, in the sense of a reorientation, even less a turning back, but a radical overhaul of his compositional technique and a fundamental renewal of his artistic self-awareness. 1 of 6