Rock and roll is a genre of popular music that evolved in the United States during the late 1940s and early 1950s. It originated from African American music such as jazz, rhythm and blues, boogie-woogie, electric blues, gospel, jump blues, as well as country music. While rock and roll's formative elements can be heard in blues records from the 1920s and in country records of the 1930s, the genre did not acquire its name until 1954.
Sign commemorating the role of Alan Freed and Cleveland, Ohio, in the origins of rock and roll
Chuck Berry in 1957
Big Joe Turner and Pete Johnson's record "Roll 'Em Pete" is regarded as a precursor to rock and roll.
Bill Haley and his Comets performing in the 1954 Universal International film Round Up of Rhythm
A music genre is a conventional category that identifies some pieces of music as belonging to a shared tradition or set of conventions. Genre is to be distinguished from musical form and musical style, although in practice these terms are sometimes used interchangeably.
Two DJs practicing turntablism
Piano accordion: Italian instrument used in several cultures
Metallica performing at the O2 Arena, March 28, 2009
John Scofield at the stage of Energimølla. The concert was part of Kongsberg Jazzfestival and took place on July 6, 2017
