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Towards an "automated art": Algorithmic processes in Xenakis' compositions

A lifelong quest of Xenakis' artistic endeavors has been the creation of an "automated art". Examples are the use of Cellular Automata (CA) for the simulation of complex "harmonic" evolutions and his recent Dynamic Stochastic Synthesis program (GENDYN). The phenomenon of automated art is a challenge to present-day musicology. An adequate music analysis approach must be, to my belief, a computational (or procedural) one. The goal is to reconstruct the laboratory conditions of the algorithmic creation process, in order to unravel the multiple layers of complexity which in principle are not accessible from the study of a musical score or a sonagram. In this spirit, the author has simulated the CA model used by Xenakis in Horos (1986) and Ata (1987) and has recomputed Xenakis' electroacoustic composition GENDY3 (1991).