Diabolus in Musica is a French medieval music ensemble based in Tours and directed by Antoine Guerber. Guerber studied medieval music under Dominique Vellard at the Centre de Musique Médiévale de Paris and at the Early Music Department of the Conservatoire National Supérieur in Lyon.
From Wikipedia (https://en.wikipedia.org/wiki/Diabolus_in_Musica_(ensemble)) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)