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