Nearly every culture has its country music, and in Brazil, it's forró. Anchored by accordion, triangle and bass drum, this is joyful, bouncy stuff—and each June and July, people all over the country celebrate the shortest days of the year with it. Hear the style's blueprint from legends Luiz Gonzaga and Jackson do Pandeiro and newer approaches from Forró In the Dark, Falamansa and Banda Garota Safado.