The B-Side Players are part of a new movement in popular music, a band that honors the international cross-pollination that has always made music the universal language. They use any beat that catches their ear, regardless of geography or genre, to create a compelling, horn driven, polyrhythmic groove. “The root of all pop music is African,” says Karlos Paez, the band’s lead vocalist, trumpet player and founder. “Our sound acknowledges that fact.