Rock music of Canada the 1920s, rock and roll did not acquire its name until the 1950s. "Rock"' or its forerunners electric blues (Chicago blues) and rhythm and blues (Jump blues) was first heard in the late 1940s by Canadians who were living close enough to the American border to tune into American radio station broadcasts. In 1951, Cleveland, Ohio, disc jockey Alan Freed began playing rhythm and blues music for a multi-racial audience, and is credited with first using the phrase "rock and roll" to describe the musical sound of the Doo-wop vocal groups and the rockabilly singers who emerged in the 1950s.
Origins of rock and roll well established in blues music but were new to the radio airwaves. After the success of "Good Rocking Tonight", many other R&B artists used similar titles through the late 1940s. At least two different songs with the title "Rock and Roll" were recorded in the late 1940s: by Paul Bascomb in 1947 and Wild Bill Moore in 1948. In May 1948, Savoy Records advertised "Robbie-Dobey Boogie" by Brownie McGhee with the tagline "It jumps, it's made, it rocks, it rolls." Another record where the phrase was repeated throughout the song was "Rock and Roll Blues", recorded in 1949 by Erline