American rock there was a Garage rock/post-punk revival. The development of digital technology led to the development of new forms of digital electronic rock. The foundations of American rock music are in rock and roll, which originated in the United States in the late 1940s and early 1950s. Its immediate origins lay in a mixing together of various black musical genres of the time, including rhythm and blues and gospel music; in addition to country and western. In 1951, Cleveland, Ohio disc jockey Alan Freed began playing rhythm and blues music for a multi-racial audience, and is credited with first using the
Origins of rock and roll to the phrase being taken as a double entendre, with the interpretation as religious or sexual. The following year, Western swing musician Buddy Jones recorded "Rockin' Rollin' Mama", which drew on the term's original meaning – "Waves on the ocean, waves in the sea/ But that gal of mine rolls just right for me/ Rockin' rollin' mama, I love the way you rock and roll". In August 1939, Irene Castle devised a new dance called "The Castle Rock and Roll", described as "an easy swing step", which she performed at the Dancing Masters of America convention at the Hotel Astor.