The piece consists of four movements, corresponding to four experiments: the first is about the generation of cantus firmi, the second generates four-voice segments with various rules, the third deals with rhythm, dynamics and playing instructions, and the fourth with various models and probabilities for generative grammars or Markov chains (see stochastic music).[3]
References
^Andrew Stiller, "Hiller, Lejaren (Arthur)", Grove Music Online (reviewed December 3, 2010; accessed December 14, 2014).