Conductor and composer of multiple film scores, including "A Night in Casablanca" from 1936. He formed the Janssen Symphony in 1940.
He studied piano with one of
His first official film score, "The General Died at Dawn" from 1936, received an Academy Award nomination. He also scored "Blockade" from 1938, "The House Across the Bay" from 1940, and "Uncle Vanya from 1957.
His father was the owner of the New York restaurant Hof Brau Haus. He married
He and Jerome Kern both composed music for Tin Pan Alley.