During the great depression in Canada, the majority of people listened to what today would be called swing (Jazz) just as country was starting its roots. The diversity in the evolution of swing dancing in Canada is reflected in its many American names, Jive, Jitterbug and Lindy. Canada's first big band star was Guy Lombardo (1902–1977), who formed his easy listening band, The Royal Canadians, with his brothers and friends. They achieved international success starting in the mid-1920s selling an estimated 250 million phonograph records, and were the first Canadians to have a #1 single on Billboard's top 100. 1932, the first Broadcasting Act was passed by Parliament creating the Canadian Radio Broadcasting Commission. It was to both to regulate all broadcasting and create a new national public radio network. 1936, the Canadian Broadcasting Corporation came into existence, at the time, a million Canadian households had a radio.
By the end of World War II, "mountaineer" string band music known as bluegrass had emerged when Bill Monroe joined with Lester Flatt and Earl Scruggs, introduced by Roy Acuff at the Grand Ole Opry. That was the ordination of bluegrass music and how Bill Monroe became to be known as the "Father of Country Music." Gospel music, too, remained a popular component of bluegrass and other sorts of country music. Red Foley, the biggest country star following World War II, had one of the first million-selling gospel hits ("Peace in the Valley") and also sang boogie, blues and rockabilly. In the post-war period, country music was called "folk" in the trades, and "hillbilly" within the industry. In 1944, The Billboard replaced the term "hillbilly" with "folk songs and blues," and switched to "country" or "country and Western" in 1949. https://www.youtube.com/watch?v=hyNAvdnZ5Ec