Together with Lehár as composer, Ludwig Herzer as co-author and Richard Tauber as singer he produced the operettas Friederike (Frederica) (1928), Das Land des Lächelns (The Land of Smiles) (1929) and, with Paul Knepler as co-author, Giuditta (1934).
He also provided a 'voice-over', singing the title song in the otherwise silent film I Kiss Your Hand, Madame (1929), starring Marlene Dietrich and Harry Liedtke.
In 1936, she played the part of Nedda in the British film version of 'Pagliacci', starring Richard Tauber.
The version shown in British cinemas also included clips featuring Richard Tauber and the Vienna Boys Choir, not in the original American version.
It has since been performed by many artists including notably Anne Ziegler and Webster Booth, Richard Tauber, Frank Sinatra and Julie Andrews.
Richard Nixon | Richard Wagner | Richard Strauss | Richard Branson | Cliff Richard | Richard Gere | Richard Burton | Richard Hammond | Richard | Richard Dawkins | Little Richard | Richard Feynman | Richard Attenborough | Richard M. Daley | Richard I of England | Richard Thompson | Richard Francis Burton | Richard Thompson (musician) | Richard Pryor | Richard Linklater | Richard III of England | Richard Petty | Richard II | Richard II of England | Richard E. Byrd | Maurice Richard Arena | Muhal Richard Abrams | Richard Herring | Richard Wright | Richard Stallman |
Richard Tauber, who was a favourite of the composer, recorded the two main tenor arias twice for Odeon Records, firstly in April 1920 by the acoustic process, and again in September 1931 electrically.
The rotating line-up of leading name performers featured Björling, Donald Dickson, Helen Jepson, Maria Jeritza, Grace Moore, Erna Sack, Joseph Schmidt and Richard Tauber.
In November 1946 he toured Canada as the accompanist for Austrian tenor Richard Tauber and in 1947 he appeared on screen in the film La Forteresse playing André Mathieu's Concerto de Québec.
Note: in spite of what is said above about Sylvia not being popular in the age of the gramophone, it was also recorded by a number of other prominent singers, including John Charles Thomas, Richard Tauber, Richard Crooks, Nelson Eddy, Eleanor Steber and Cesare Siepi, all of whom can be heard singing it on YouTube.
Kahn accompanied some of the great musicians of the day, including violinists Mischa Elman and Fritz Kreisler; sopranos Dame Nellie Melba, Luisa Tetrazzini, Florence Austral and Oda Slobodskaya, tenors Enrico Caruso, John McCormack, Richard Tauber, Joseph Hislop and Beniamino Gigli; and baritones Titta Ruffo and John Brownlee.