The paper draws up a preliminary inventory of the endangered musical heritage of the island of Ataúru (Timor-Leste), through a first survey in two villages (Makdadé, and Makili). After a summary of the musical forms presented through time, the analysis of the prevalent musical forms and styles show a common musical idiom between the two villages, and a lively musical tradition. A short musical glossary of the two villages is given with a distinction between musical forms and instruments.