Starting as a professional in the '80s, Humberto Araújo worked as an arranger and instrumentalist for João Donato, Tim Maia, Jorge Ben Jor, Ivan Lins, Paralamas do Sucesso, Elza Soares, Leny Andrade, Zé Ramalho, Carlos Lyra, Leila Pinheiro, Nelson Gonçalves, and Noca da Portela, among others. As a composer, he wrote soundtracks for theater (Fedra, directed by Augusto Boal; Pipoka and Corda Bamba, by the Dutch group Munganga), cinema (having been awarded with the Iracema trophy for the best music at the Cinema Festival of Fortaleza with the soundtrack for the film A Última Canç...