Choro (Portuguese pronunciation: [ˈʃoɾu], "cry" or "lament"), also popularly called chorinho ("little cry" or "little lament"), is an instrumental Brazilian popular music genre which originated in 19th century Rio de Janeiro. Despite its name, the music often has a fast and happy rhythm. It is characterized by virtuosity, improvisation and subtle modulations, and is full of syncopation and counterpoint. Choro is considered the first characteristically Brazilian genre of urban popular music. The serenaders who play choros are known as chorões.
Originally choro was played by a trio of flute, guitar and cavaquinho (a small chordophone with four strings). Other instruments commonly played in choro are the mandolin, clarinet, saxophone, trumpet and trombone. These melody instruments are backed by a rhythm section composed of guitar, 7-string guitar (playing bass lines) and light percussion, such as a pandeiro. The cavaquinho appears sometimes as a melody instrument, other times as part of the rhythm.
Structurally, a choro composition usually has three parts, played in a rondo form: AABBACCA, with each section typically in a different key (usually the tonal sequence is: principal key->relative mode->sub-dominant key). There are a variety of choros in both major and minor keys.
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, (e.g. in the 1870s flutist Joaquim Antônio da Silva Callado formed an ensemble called "Choro Carioca", with flute, two guitars and cavaquinho), and later the term referred to the music genre of these ensembles. The accompanying music of the Maxixe (dance) (also called "tango brasileiro") was played by these choro ensembles. Various genres were incorporated as subgenres of choro such as "choro-polca", "choro-lundu" "choro-xote" (from schottische), "choro-mazurca", "choro-valsa" (waltz), "choro-maxixe", "samba-choro", "choro baião".