The third of six concerts dedicated to electronic and electroacoustic music. Six concerts where art and technique meet. A glossary of six words to orientate the listener. 4. Concrete music: from the French "musique concrète" and associated with the name of French composer Pierre Schaeffer who - thanks to the new possibilities offered by recording techniques - inaugurated in the 1940s a season of electronic music and a new way of conceiving and perceiving sound.