"Choro, traditionally called chorinho ("little cry" or "little lament"), is a Brazilian popular music instrumental style. Its origins are in the 19th century in Rio de Janeiro. In spite of the name, the style often has a fast and happy rhythm, characterized by virtuosity, improvisation, subtle modulations and full of syncopation and counterpoint.
Choro is considered the first urban popular music typical of Brazil.
In the 19th century, choro resulted from the style of playing several musical genres (polka, schottische, waltz, mazurka and habanera) by carioca musicians, who were already strongly influenced by African rhythms, principally the lundu and the batuque. The term "choro" was used informally at first to refer to the style of playing, or a particular instrumental ensemble.
Just like ragtime in the United States, tango in Argentina and habanera in Cuba, choro springs up as a result of influences of musical styles and rhythms coming from Europe and Africa."