Translations:What is sonification/21/en

The case of Xenakis’ “Polyagogia”

Iannis Xenakis (1922–2001) was a pioneering architect and composer of the 20th century. The concept of schematic sonification using electronic means, as described above—that is, the conversion of a shape into sound in a manner analogous to the conversion of data into a graph—was studied by Xenakis as early as the 1950s, but it took its final form in the late 1970s. By bypassing the mediation of formal education, Xenakis dared to establish a world of holistic sonic experience as he conceived, designed, and implemented the sonic rendering of graphs in the form of a comprehensive system. This system included an electromagnetic stylus on an architectural design canvas, connected to a computer and speakers; it was named in Greek “Polyagogia” ("Πολυαγωγία", Unité Polyagogique Informatique de CEMAMu/U.P.I.C.) The pedagogical dimension of this connection was emphasized early on by Xenakis. The image below clearly illustrates this connection, as the architectural canvas corresponds to the keys of a piano (vertically on the screen).