Hot, Buttered Soul from Bahia! Os Tincoãs, with their hauntingly beautiful vocals, were named for a bird common to Bahia (the tincoã) which is reputed to have mystical powers to warn humans of impending storms on the horizon...the group comprising three vocalists hailing from Cachoeira, Bahia. They formed in 1960, but they really hit their stride three years later when Erivaldo left the ensemble and Mateus Aleliua -- bringing his style forged in Bahia's houses of candomblé -- joined Heraldo and Dadinho.