^Waxer, pg. 5, notes that it is generally agreed "that salsa's primary musical foundation is Cuban; in particular, salsa generally follows the same two-part structure and rhythmic base of Cuban son.
^Morales, pg. 33 Morales claims that many Afro-Cuban purists continue to claim that salsa is a mere variation on Cuba's musical heritage (but) the hybridizing experience the music went through in New York from the 1920s on incorporated influences from many different branches of the Latin American tradition, and later from jazz, R&B, and even rock.Ed Morales' essential claim is confirmed by Unterberger's and Steward's analysis.