Origins of rock and roll "Rock and Roll" Harris. These songs were generally classed as "race music" or, from the late 1940s, "rhythm and blues", and were barely known by mainstream white audiences. However, in 1951, Cleveland disc jockey Alan Freed began broadcasting rhythm, blues, and country music for a multi-racial audience. Freed, familiar with the music of earlier decades, used the phrase rock and roll to describe the music he aired over station WJW (850 AM); its use also is credited to Freed's sponsor, record store owner Leo Mintz, who encouraged Freed to play the music on the radio. Originally Freed used the name
Rock and roll Rodgers, Moon Mullican and other similar singers), were among the first music to present African-American sounds for a predominantly white audience. One particularly noteworthy example of a jazz song with recognizably rock and roll elements is Big Joe Turner with pianist Pete Johnson's 1939 single "Roll 'Em Pete", which is regarded as an important precursor of rock and roll. The 1940s saw the increased use of blaring horns (including saxophones), shouted lyrics and boogie woogie beats in jazz-based music. During and immediately after World War II, with shortages of fuel and limitations on audiences and available personnel, large jazz bands