In this paper, the author consideres music sequence as the result of abstract computations, and he tries to study the process of such computations involved in a passage of György Ligeti's Melodien, a piece for small orchestra which was written en 1971. The tool used for this research is PatchWork (Lisp environment with graphical and musical interface).
NOTE : [*] This paper is an extended version of a conference presented at the
International Symposium on Music and Mathematics, Bucharest, May 29-30,
1994. The computer reconstruction of Ligeti's fragment has been done in collaboration with Gérard Assayag (Music
Representation Group, at Ircam).