- The Munich Symphony Orchestra· Libor Pešek· Pierre Narrato· Hamburg Symphony Orchestra· Bruno Walther· Alfred Scholz· St. Louis Symphony Orchestra· Bernhard Paumgartner· Herbert von Karajan· Leopold Stokowski· R.A.I. Symphony Orchestra of Milan· Nino Sanzogno· Mozarteumorchester Salzburg· The Philadelphia Orchestra· Musici di San Marco· Belgium Festival Orchestra· Slovakian Philharmony· New York Philharmonic· Leonard Slatkin· Hans Jurgen Walter
- Studio Pianist· Amelita Galli-Curci· Nathaniel Shilkret· Tito Schipa· Josef Pasternack· Rosario Bourdon· The Victor Orchestra· Charles A. Prince
