After obtaining awards and fulfilling his military obligations, Méloni, on the advice of Pierre Barbizet, took the entrance exam to the Conservatoire de Paris in 1964 and was admitted to the singing class of Janine Micheau.
In October 1962, he participated in the world premiere of Jacques Emmanuel's L'Opéra d'Aran [fr] (lyrical drama), with Pierre Delanoë and Louis Amade, to music by Gilbert Bécaud at the Théâtre des Champs-Élysées.
In comic opera, Méloni participated in the productions of the plays The Tales of Hoffmann, Mireille, Pagliacci, La Bohème, Madame Butterfly, Lakmé, The Marriage of Figaro, Platée, etc.
There, he had the opportunity to work with conductors such as G. Solti, C. Platane, N. Santi, S. Baudo, G. Markerras, G. Pretre, P. Boulez, A. Lombard, M. Plasson, J.C. Casadessus, P. Derveaux, R. Benzi and directors such as G. Strehler, P. Chereau, G. Lavelli, J.L.
In London for the BBC, in Belgium in Brussels, at the Théâtre de la Monnaie and the Opéra de Wallonie, in Switzerland in Lausanne, in Italy, at La Scala in Milan for the production of Alban Berg's Lulu and in Palermo, in the Netherlands at Radio Hilversum for Padmâvatî by Albert Roussel, in Spain at the Licco in Barcelona, in Germany at Karlsruhe (Roméo et Juliette by Gounod), in Portugal at Lisbon for Iphigenie en Tauride by Gluck, and toured with the Paris Opera in the United States, New York and Washington, for Faust and The Tales of Hoffmann.