From Wikipedia: “The Pygmies are a broad group of people who live in Central Africa, especially in the Congo, the Central African Republic and Cameroon. Music is an important part of Pygmy life, and casual performances take place during many of the day’s events. Music comes in many forms, including the spiritual likanos stories, vocable singing and music played from a variety of instruments. Some of the Pygmies [...] are particularly known for their dense contrapuntal communal improvisation.”
Amazing, polyphonic stuff. They say that if the pygmies find a new item (a pipe, a bottle, a shoe), they will find a way to turn it into an instrument. Also, their word for music is the same of their word for dance, and they do not differentiate between the two.