Yvonne Brothier

Alfred Hertz

Symphonie-Orchester Dajos Béla

Cyrena Van Gordon

Aleksandar Griff

Elisabeth Schumann

Charles Harrison

Maria Barrientos

Wolfgang Amadeus Mozart

Kristoffersen Brothers

Ulysses Lappas

Carlotta Vanconti

Columbia Light Opera Company

Nordöstlicher Arbeiter-Sängerbund

Victor Light Opera Company

Emilio De Gogorza

Victor Concert Orchestra

Dusolina Giannini

Virginia Rea

Rosario Bourdon

Paul Razavet

Johannes Heidenreich

Franz Völker

Harry Welchman

Mario Laurenti