6 is scored for an orchestra consisting of 2 piccolos, 2 flutes, 2 oboes, cor anglais, 2 clarinets, bass clarinet, soprano saxophone, 2 bassoons, contrabassoon, 4 horns, 4 trumpets, 4 trombones, tuba, timpani, percussion (bass drum, tam-tam, surdo, camisão (small and large), snare drum, coco, roncador, tamborim de samba, tambu-tambi, suspended cymbal with metal beater, cuíca, reco-reco, xylophone, glockenspiel) celesta, 2 harps, and strings.

The climate, color, temperature, light, chirping of birds, the scent of honeyed grass between the hen-houses, and all elements of nature of a hinterland served as inspiration for motives in this work; however, it does not represent any objective aspect nor a descriptive flavor.

[6]The opening melody, played by a flute (one of the most typical instruments of the improvising choro ensembles) is a seresteiro theme, sharply contrasting with the polytonal harmonic environment, which "leads us to hazy stopping points of simultaneous sounds among the forests of the Amazon valley".

[6] This melody, which enters over the soft sounds of Brazilian percussion instruments and strings, is a slightly altered quotation of Lundu característico by the flautist and band-leader Joaquim Antônio da Silva Calado, who was one of the founders of the popular choro genre in the late nineteenth century.

[7] The alterations, however, make it also similar to a popular melody called O Nó (The Knot), by the trombonist Cândido Pereira da Silva, nicknamed "Candinho Trombone [pt]".