Just when you think you know Cuban music, along comes the Creole Choir of Cuba. This group sprang from the ashes of Grupo Vocal Desandann, a small vocal outfit created in the late 1990s to celebrate traces of Haitian culture in eastern Cuba. That history dates back to the late 18th century, when slaves from Haiti were delivered to Cuba to harvest sugarcane after successful slave revolts in Haiti. A long-lost culture was revitalized by the group through music performed largely a cappella and entirely in Haitian Creole.