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