Not exactly about music, but can't help but touch on it.
There are 4 episodes to this series:
1) Haiti & the Dominican Republic: An Island Divided.
Viewable
here2) Cuba: The Next Revolution.
3) Brazil: A Racial Paradise?
4) Mexico & Peru: The Black Grandma in the Closet.
I imagine all 4 episodes, once they have been broadcast, will eventually be viewable at the PBS website.
A tough assignment to distill so much history into a 1 hour presentation.
Harvard professor Henry Louis Gates does a decent job of it.