Rock music features vocals, electric guitars, a powerful backbeat, and the occasional saxophone. A key element is Rock n Roll, and the terms are used interchangeably. "Rock n Roll" is a nautical expression and refers to the motions of a ship. It entered black spiritual music in 1916; "Rocking" was used by African Americans to describe the bliss they experienced at religious events and their accompanying music. Simultaneously, black secular musicians used the term for dancing or sex.

Wynonie Harris' 'Good Rocking Tonight' started the "rock" fad in 1947, though people became aware of it only in 1954, owing to tracks like 'Shake, Rattle, and Roll' and 'Rock Around The Clock'. In the mid-50's, when Rock n Roll scaled popularity charts, record companies began promoting singers. RCA backed Elvis Presley