Anne-Sylvie Barthel-Calvet is Associate Professor of Musicology at the Université de Lorraine; she also teaches at the Université de Strasbourg. A specialist of European avant-garde music and of the composer Iannis Xenakis, she is currently finishing a biography of Xenakis that will be published by Fayard in 2022. Barthel Calvet previously edited Propositions pour une historiographie critique de la création musicale après 1945 (2011).

Christopher Brent Murray is a Professor at the Conservatoire national supérieur de musique et danse de Paris and teaches at the Université libre de Bruxelles. He is co-author, with Yves Balmer and Thomas Lacôte of Le modèle et l'invention: Olivier Messiaen et la technique de l'emprunt (2017).