Alben Carlo Bergonzi, Elena Mosuc, Judith Raskin, Vesselina Kasarova, Andreas Staier, Angelika Kirchschlager, Benita Valente, Bo Skovhus, Christian Gerhaher, Christoph Prégardien, Dame Kiri Te Kanawa, Elly Ameling, George Schick, Helmut Deutsch, Karita Mattila, Leon Fleisher, Marlena Kleinman, Martial Singher, New Philharmonia Orchestra, Philippe Entremont, Richard Amner, Rudolf Serkin, Régine Crespin, Sir Andrew Davis, Sir Peter Pears, Susan Graham, Thomas Quasthoff & Wayne Conner
