In the teens of the 20th century, Sexteto Bolona were one of the most influential performers of son, a vivid Afro-Spanish fusion of musical styles. Son consists of two stylistic levels. The first level (African in origin) is a rumba rhythm over which a variety of percussionists improvise. The second level (deriving from Spain) is provided by a combination of three string guitars known as tres and a makeshift bass. Spanish lyrics are sung over the instruments in traditional decima form with rhymed octosyllabic lines. The group diversified in the 1920s, bringing in Felix Chapoti...