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.
The King of Rock 'n' Roll: The Complete 50's Masters are not of professional sound quality; these are marked with an asterisk." The King of Rock 'n' Roll: The Complete 50's Masters The King of Rock 'n' Roll: The Complete 50's Masters is a five-disc box set compilation of the complete known studio master recordings by American singer and musician Elvis Presley during the decade of the 1950s. Issued in 1992 by RCA Records, catalog number 66050-2, it was soon followed by similar box sets covering Presley's musical output and . This set's initial long-box release included a set of collectible stamps duplicating the record jackets from every Presley LP