Piano excerpt from the rumba boogie “Mardi Gras in New Orleans” (1949) by Professor Longhair. 2-3 clave is written above for rhythmic reference.
The syncopated, but straight subdivision feel of Cuban music (as opposed to swung subdivisions) took root in New Orleans R&B during this time. Alexander Stewart states that the popular feel was passed along from “New Orleans—through James Brown’s music, to the popular music of the 1970’s,” adding: “The singular style of rhythm & blues that emerged from New Orleans in the years after World War II played an important role in the development of funk. In a related development, the underlying rhythms of American popular music underwent a basic, yet generally unacknowledged transition from triplet or shuffle feel to even or straight eighth notes. Concerning the various funk motifs, Stewart states: “This model, it should be noted, is different from a time line (such as clave and tresillo) in that it is not an exact pattern, but more of a loose organizing principle.”
Johnny Otis released the R&B mambo “Mambo Boogie” in January 1951, featuring congas, maracas, claves, and mambo saxophone guajeos in a blues progression. Listen: “Mambo Boogie” by Johnny Otis (1951).
Saxophone guajeo in blues progression. “Mambo Boogie” by Johnny Otis (1951).
Ike Turner recorded “Cubano Jump” (1954) an electric guitar instrumental, which is built around several 2-3 clave figures, adopted from the mambo. Listen: “Cubano Jump” by Ike Turner (1954). The Hawketts, in “Mardi Gras Mambo” (1955) (featuring the vocals of a young Art Neville), make a clear reference to Perez Prado in their use of his trademark “Unhh!” in the break after the introduction. Listen: “Mardi Gras Mambo” by the Hawketts (1955).
Ned Sublette states: “The electric blues cats were very well aware of Latin music, and there was definitely such a thing as rhumba blues; you can hear Muddy Waters and Howlin’ Wolf playing it.” He also cites Otis Rush, Ike Turner and Ray Charles, as R&B artists who employed this feel.
The use of clave in R&B coincided with the growing dominance of the backbeat, and the rising popularity of Cuban music in the U.S. In a sense, clave can be distilled down to tresillo (three-side) answered by the backbeat (two-side).
3-2 clave written in two measures in cut-time.
Tresillo answered by the backbeat, the essence of clave in African American music.
The “Bo Diddley beat” (1955) is perhaps the first true fusion of 3-2 clave and R&B/rock ‘n’ roll. Watch: “Hey Bo Diddley” performed live by Bo Diddley (1965). Bo Diddley has given different accounts of the riff’s origins. Sublette asserts: “In the context of the time, and especially those maracas [heard on the record], ‘Bo Diddley’ has to be understood as a Latin-tinged record. A rejected cut recorded at the same session was titled only ‘Rhumba’ on the track sheets.” Johnny Otis’ “Willie and the Hand Jive” (1958) is another example of this successful blend of 3-2 clave and R&B. Watch: “Hand Jive” performed by Johnny Otis. The Johnny Otis Show. Otis used the Cuban instruments claves and maracas on the song.

Bo Diddley’s “Bo Diddley beat” is a clave-based motif.