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 swing your partners" in "West Coast Blues", which in turn formed the basis of "Old Country Rock" by William Moore the following year. Also in 1927, traditional country musician Uncle Dave Macon, with his group the Fruit Jar Drinkers, recorded "Sail Away Ladies" with a refrain of "Don't she rock, daddy-o", and "Rock About My Saro Jane". Duke Ellington recorded "Rockin' in Rhythm" in 1928, and Robinson's Knights of Rest recorded "Rocking and Rolling" in 1930. In 1932, the phrase "rock and roll" was heard in the Hal Roach film "Asleep in the Feet". In 1934, the Boswell Sisters had