Kuenta i Tambú, a group from Amsterdam with members from the Dutch Antilles, wants the wider world to hear tambú, an African-rooted percussion-and-vocal tradition from Curaçao. Its set mingled tambu with the simpler, more familiar rhythms and pop refrains of electronic dance music, soca and hip-hop, with its lead vocalist, Diamanta von Lieshdeck, rapping in both English and the Antillean language Papiamentu. The six-beat complexity and metal percussion of tambú arrived, strategically, as peaks of momentum.