Bloco is a music genre that originated in Brazil and is often associated with Carnival. It involves the use of percussion instruments such as drums, tambourines, and shakers, as well as brass instruments such as trumpets and saxophones. The music is lively and upbeat, with a strong emphasis on rhythm and dance. Bloco is often played by large groups of musicians who march through the streets during Carnival, creating a festive and joyful atmosphere.