A pupil of Régine Crespin and Gabriel Bacquier at the Conservatoire de Paris, Katz completed three years of training at the Studio of the Centre de Musique Baroque de Versailles (conducted by Rachel Yakar and René Jacobs, then Marc Minkowski), as well as master classes with Daniel Ferro, Ileana Cotrubas, Suzanne Danco, Irène Joachim, Gérard Lesne, Janine Reiss, Gérard Souzay...
