Origins of rock and roll but it was used by the early 20th century, both to describe a spiritual fervor and as a sexual analogy. Various gospel, blues and swing recordings used the phrase before it became used more frequently – but still intermittently – in the late 1930s and 1940s, principally on recordings and in reviews of what became known as "rhythm and blues" music aimed at black audiences. In 1951, Cleveland-based disc jockey Alan Freed began playing this music style while popularizing the term "rock and roll" to describe it. Various recordings that date back to the 1940s have been named as the
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