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. That’s why the music is so soulful.