Stockhausen calls his piano pieces his "drawings", the pieces in which he sketches out ideas without the added color complexity of instrumental timbres. More significantly, in these early pieces you can hear a composer grappling with the challenge of electronic sound, looking for "envelope curves" that will allow the old medium to compete with the new. As played by David Tudor in this historic recording, the piano gives its answer to the synthesizer. David Tudor is without question one of the premier figures in the performance of new music since the middle of this century. As a pianist, Tudor gave highly acclaimed first performances of works by contemporary composers Pierre Boulez, Earle Brown, Sylvano Bussotti, John Cage, Morton Feldman, Karlheinz Stockhausen, Christian Wolff, Stephan Wolpe, and La Monte Young, among others. As a composer, Tudor chose specific electronic components and their interconnections to define both composition and performance drawing upon resources that were both flexible and complex.