December 25, 1930. (Less than good quality audio). The Fleischmann's Yeast Hour (also known as The Rudy Vallée Show, The Fleischmann Yeast Hour, and The Fleischmann Hour) was a pioneering musical variety radio program broadcast on NBC from 1929 to 1936, when it became The Royal Gelatin Hour, continuing until 1939. This program was sponsored by Fleischmann’s Yeast, a popular brand of yeast. The person responsible for this major step ahead in broadcasting was NBC executive Bertha Brainard, who became head of programming for NBC in 1928. She began pushing for singer-bandleader Rudy Vallée to host a variety series by explaining that only a woman could understand the appeal of Vallée's voice.