The "Baio" speak like - "Buy on", is a popular style music in Brazil. Listen to 2nd bass lines, and you'll hear the rhythm style of this music. The music used is "Asa Branca" or "White Wing" - a bird specie from poor regions in Brazil. Try to play the both voices toghether. Good Luck! P.S: Look for mp3 from these albuns: "Gilberto Gil - Eu Tu Eles" or "Luiz Gonzaga"