Madagascar is a smallish place (about the size of Texas) with an incredibly rich diversity of music. 
The island was populated successively from Borneo, Africa, Arabia, France and elsewhere. Here's a mere taste of the resulting music, from a concert in Ivry, France. You can see, hear, and read about some of the instruments of Madagascar at the web site of the Museum of Art and Archaeology of the University of Antananarivo.