- Marian Anderson, Albert Spalding, Franz Rupp, Joseph Kahn, William Primrose, Johana Harris, Jascha Heifetz, Vladimir Sokoloff, Harry Isaacs, Andre Benoist, Vernon de Tar
- Gerhard Steeger, Heinrich Schlusnus, Franz Rupp, Kurt Schröder, Berlin Staatsoper Orchestra, Sebastian Peschko, Frankfurt Radio Symphony