Jean-Christophe Jacquin presents the phrases and playing techniques of percussion played by the batteries of grandes écoles at the Rio Carnival parades. The intrumentarium of the batucadas, Surdos, Caisses, Repinique, Tamborim, Agogôs, Chocalhos ect ... is studied in detail. Each instrument is played alone, at normal tempo, in slow motion and in polyrhythm with the orchestra. More a documentary shot during the Carnival of Rio in 2001. Preparations for the carnival, visit a craft workshop manufacturing nstruments .... A booklet with the scores.