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 Man!" as "an instrumental screamer.. [which].. displays its rock and roll capacities when tackling the righteous rhythms." In the April 25, 1945 edition, Orodenker described Erskine Hawkins' version of "Caldonia" as "right rhythmic rock and roll music", a phrase precisely repeated in his 1946 review of "Sugar Lump" by Joe Liggins. A double, ironic, meaning came to popular awareness in 1947 in blues artist Roy Brown's song "Good Rocking Tonight", covered in 1948 by Wynonie Harris in a wilder version, in which "rocking" was ostensibly about dancing but was in fact a thinly veiled allusion to sex. Such double-entendres were