Naná Vasconcelos is one of the cluster of endlessly inventive Brazilian percussionists who were changing the direction and sounds of Brazilian jazz in the post-bossa nova 1970s. Vasconcelos is an especially inventive virtuoso of the berimbau, the weird yet expressive instrument shaped like an archer's bow, and he is also adept at the odd-numbered meters (5/4, 7/4) that were used frequently in the north but not the south of Brazil.