I work for Chef Luis who was formerly an adjudicator with Fred Astaires', now he gives shows cooking & dancing. He is Mexican and Cumbia is one of his faves, I'm sure he can break it down for you. Go to: http://chefluis.tv/aboutluis.html and send an email rquesting info on the Cumbia. This is not his personal address however they will fwd the message to him. Happy Dancin'.