Sylvan Levin

Städtisches Orchester Berlin

Howard Barlow

Anatole Fistoulari

Sir Hamilton Harty

Gioacchino Rossini

Lorenzo Alvary

Arturo Toscanini

Helen Traubel

Ruggiero Leoncavallo

Richard Wagner

Orchestra Del Teatro Alla Scala

Artur Rodzinski

Giacomo Puccini

Philharmonic-Symphony Orchestra Of New York

Rose Bampton

Jean Morel

Franco Ghione

Berliner Philharmoniker

Stella Andreva

Victor Symphony Orchestra

Bidú Sayão

Gladys Swarthout

Robert Merrill

Sergei Prokofiev