CELLULAR AUTOMATA IN XENAKIS’ MUSIC. THEORY AND PRACTICE Makis Solomos Université Montpellier 3, Institut Universitaire de France
[email protected] In Makis Solomos, Anastasia Georgaki, Giorgos Zervos (eds.), Definitive Proceedings of the International Symposium Iannis Xenakis (Athens, May 2005). Paper first published in A. Georgaki, M. Solomos (eds.), International Symposium Iannis Xenakis. Conference Proceedings, Athens, May 2005, p. 120-138. This paper was selected for the Definitive Proceedings by the scientific committee of the symposium: Anne-Sylvie Barthel-Calvet (France), Agostino Di Scipio (Italy), Anastasia Georgaki (Greece), Benoît Gibson (Portugal), James Harley (Canada), Peter Hoffmann (Germany), Mihu Iliescu (France), Sharon Kanach (France), Makis Solomos (France), Ronald Squibbs (USA), Georgos Zervos (Greece) This paper is dedicated to Agostino Di Scipio, Peter Hoffmann and Horacio Vaggione. The English version, edited here, has not been revised. ABSTRACT Cellular automata are developed since some decades, belonging to the field of abstract automata. In the beginning of the 1980s, they were popularized in relationship with the study of dynamic systems and chaos theories. They were also applied for modelling the evolution of natural systems (for instance biological ones), especially in relationship with the idea of auto-organization. From the end of the 1980s since nowadays, several composers begin to use cellular automata. Xenakis must have been one of the first (or the first), as he used them, probably for the first time, in Horos (1986), so as to produce harmonic progressions and new timbre combinations. His use of cellular automata seems to be limited. This paper has three aims: 1. To try to understand the reasons why Xenakis used cellular automata.