    choro (, "cry" or "lament"), 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 chorÃµes.  ==choro instruments== thumb|instruments commonly played in choro 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. ==compositional structure== 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 keyhttp://www.highbeam.com/doc/1g1-91658404.html). there are a variety of choros in both major and minor keys. ==history==   {{listen|filename=amapÃ¡ - dante santoro - 1941- juca storoni.ogg|title=amapÃ¡|description=choro (maxixe/brasilian tango) "amapÃ¡" composed by costa jÃºnior in
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