Rock and roll
|Rock and roll|
|Cultural origins||Late 1940s – early 1950s,
Rock and roll (often written as rock & roll or rock 'n' roll) is a genre of
In the earliest rock and roll styles of the late 1940s and early 1950s, either the piano or saxophone was often the lead instrument, but these were generally replaced or supplemented by guitar in the middle to late 1950s.
 The beat is essentially a blues rhythm with an accentuated
Beyond simply a musical style, rock and roll, as seen in movies and on television, influenced lifestyles, fashion, attitudes, and language. In addition, rock and roll may have contributed to the civil rights movement because both African-American and white American teens enjoyed the music.
 It went on to spawn various genres, often without the initially characteristic backbeat, that are now more commonly called simply "
The term "rock and roll" now has at least two different meanings, both in common usage. The
The phrase "rocking and rolling" originally described the movement of a ship on the ocean,  but was used by the early twentieth century, both to describe the spiritual fervor of black church rituals  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 1940s, on recordings and in reviews of what became known as "rhythm and blues" music aimed at a black audience. 
In 1934, the song "Rock and Roll" by the