Greatly influenced by Luiz Gonzaga but a major talent in his own right, accordion player Oswaldinho do Accordeon is among Brazil's masters of forró--a highly energetic, accordion-dominated style that is associated primarily with Brazil's Northeastern region. But the instrumentalist, whose names translates to "Little Oswald of the Accordion," isn't from Northeastern Brazil originally. Oswaldinho was actually born in Rio de Janeiro, where he lived as a child before moving to São Paulo when he was 10 in 1962. Oswaldinho's father, Pedro Sertanejo (himself an accordion player and a...