Born in 1963, Xavier Delette received his first music lessons in his hometown Roubaix. He continued his studies at the Conservatoire National Supérieur de Musique de Paris until 1987, winning several first Prizes. After obtaining his conservatory director and music teacher certifications in the same year, he was appointed vice-director of the Conservatoire à Rayonnement Régional (CRR) de Lille and later, from 1997 until 2003, he was head of the Conservatoire Maurice Ravel Côte Basque & l'Orchestre Régional Bayonne Côte Basque, where he introduced several training programs reflecting his interest in contemporary music, cinema concerts, ballets, and musical comedy.
As a conductor, he has worked with prestigious soloists like Yo-Yo Ma, Sayaka Shoji, Quatuor Ysaÿe, Alexia Cousin, Michèle Command, Aldo Ciccolini, Alexander Lagoya, and Maurice André, and orchestras, such as Orchestre d’Euskadi, Orchestre Philharmonique de Radio-France, Orchestre de Pau, and Ensemble Pythagore. He delivered premieres of compositions by Philippe Hersant, François Rossé and Joël Merah, and recorded works by Peïo Cabalette, Thierry Escaich, Nicolas Bacri (the double CD Cantates received the 5 Diapason and 10 Répertoire awards as well as the Grand Prix des Lycéens 2005).
Since September 2005, Xavier Delette is director of the CRR de Paris performing regularly with its musical formations.