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