Original: In 1928, he made his stage debut in Ernst Krenek's Jonny spielt auf in Paris, and in 1929 he sang for the first time in the United States in NoÃ "l Coward's Bitter Sweet.
Simplified: Then, in 1928, he got a part in the jazz opera Jonny spielt auf by Ernst Krenek when it was performed in Paris. The next year he sang for the first time in the United States in NoÃ "l Coward's Bitter Swee t/O. He worked in Geneva until 1933, then he went to Paris where he met the music teacher Nadia Boulanger.