In 1970s, he joined Quinteto Armorial, a musical group idealized by Ariano Suassuna for creating classical chamber music from Brazilian folklore roots.
He was invited by the president of Brazil to write a string in honor of Ariano Suassuna.
It is based on the 1955 play of almost the same name by Ariano Suassuna, with elements of The Ghost and the Sow, and Torture of a Heart, plays both also by Suassuna.