- Ezio Flagello, Shirley Verrett, Robert Merrill, Oliviero de Fabritiis, Leontyne Price, Reri Grist, Laura Londi, Corinne Vozza, Francesco Molinari-Pradelli, Fernando Iacopucci, Mario Sereni, Daniel Guss, Erich Leinsdorf, Thomas Schippers, Robert El Hage, Hartje Mueller, Carlo Bergonzi, Júlia Hamari, Giorgio Tozzi, Arturo Basile, Orchestra of the Rome Opera House, John Newton, RCA Italiana Opera Orchestra