Rádio S. amb. a - 2000 release. "What would 'heavy' music sound like if it's practitioners knew more than a couple of rhythms and, even better, how to blend them? What if headbanging wasn't a back-and-forth motion but worked in various degrees of side-to-side movements, too? What if metal had room for musicology? Nacao Zumbi, from Recife in northeastern Brazil, answered these questions and thrashed out their position in a deeply impressive midnight set at CBGB on Wednesday. "