"Mambo" is a 1938 danzón nuevo ritmo by Antonio Arcaño y sus Maravillas. It was composed by the band's cellist/multi-instrumentalist Orestes López. The piece includes a final section with syncopated montunos which would give rise to the mambo music genre popularized by Dámaso Pérez Prado and others.
Personnel
References
Mambo (1938 song) Wikipedia(Text) CC BY-SA