The Atrato river crosses the Chocó forest in Colombia. The artist, along with a group of researchers and musicians, asked riverside Afro-Colombian residents to revive an old tradition, which comprises hitting the river’s surface with their hands and arms. With this action they reproduced a sound inspired by local rhythms, creating percussive music through which the sounds of explosions and impacts of bullets in armed conflict are reproduced: sounds sadly familiar to local inhabitants.