Ljubomir Bodourov, Stefka Mineva, Lidia Gocheva, Alberto Rinaldi, Sofia National Opera Chorus, Rouslan Raichev, Stoil Georgiev, Anna Tomowa-Sintow, Sofia National Opera Orchestra, Nicolai Stoilov, Angel Petkov & Giacomo Aragall
Alberto Erede, Renata Tebaldi, Swiss Romande Orchestra, RAI Symphony Orchestra, Milan, Nino Sanzogno, Orchestra del Teatro alla Scala di Milano, Arturo Toscanini, Arturo Simonetto, Carlo Bergonzi, Mario del Monaco, Dimitri Mitropoulos, Fiorentino Maggio Musicale Orchestra, Silvio Maionica, Hans Beirer, Karl Böhm, San Carlo Theatre Orchestra, Gaetano Merola, San Francisco Opera Orchestra, Giuseppe di Stefano, Carlo Maria Giulini & RAI Symphony Orchestra Rome
French National Radio Orchestra, Sir Thomas Beecham, French National Radio Chorus, Les Petits Chanteurs de St. François de Versailles, Bernard Plantey, Michel Hamel, Xavier Depraz, Victoria de los Ángeles, Janine Micheau, Nicolai Gedda, Ernest Blanc, Denise Monteil, Monique Linval & Marcelle Croisier
Wolfgang Glashof, Rundfunk-Sinfonieorchester Berlin, Gertrud Ottenthal, Guido Maria Guida, St. Hedwig's Cathedral Choir, Bruno Lazaretti, Hanns-Martin Schneidt, RIAS Chamber Chorus, Roberto Servile, Bruno Lazzaretti, Hans Maile, Gisella Pasino & Georg Donderer