Thomas Altmann wrote:smells of David P.
Guilty as charged Thomas! 
Do you have that CD 
Yoruba Drums from Benin, West Africa? There is an example of the duple-pulse form ("2/4") of the standard pattern 
played on a small bata drum head on the cut "Ogogo." The pattern is also used in some arrangements of columbia (
Viejos cantos afrocubanos) and conga de comparsa (
Conga tu carnaval, Hermanos Bravo, 2000: CD).
-David