Encounter : Le Polytope de Cluny de Iannis Xenakis

The music, with its homonymous title, is often played as electroacoustic music - it uses material from Xenakis's earlier pieces, but also included, for the first time, the sounds of stochastic synthesis. As for the visual performance—made of flashes, laser beams and mirrors, with configurations that are sometimes abstract, sometimes concrete—was entirely computerized and thought to be lost. But the digitization of the Xenakis archives makes it possible, today, to recreate it, a recreation that this seminar will question.