François Ribac was a composer of musical theatre and a sociologist, emeritus senior lecturer at the University of Burgundy and associated member of LADYSS laboratory, France. His research focused on environmental humanities, popular music, sound reproduction and cultural expertise. Isabelle Moindrot is Professor of Theatre Studies at Université Paris 8 and a member of the Institut Universitaire de France (IUF). Her work focuses on operatic dramaturgy, the history of theatrical spectacle and contemporary opera staging. Nicolas Donin is Professor and Chair of musicology at the University of Geneva. He has published extensively on the history of music and musicology since the 19th century, with a focus on contemporary composition and performance.