The Đan Đa is a lithophone played by ethnic minority groups in the Central Highlands of Vietnam, in the provinces of Lam Đong, Đak Nong, Đak Lak, Gia Lai, and Kon Tum.This is a monograph to collect and systematize all documents on Đan Đa discovered in Vietnam so far. The content of the book includes determining the distribution space and development tradition of the Vietnamese Dan Da. At the same time, determine the age and historical value of the Dan Da relic in the context of the historical development of the South, South Central Highlands and South Central regions. Studying the process of making Đan Đa: stone material used; Measurements for each bar; compare with each and many different collections; chisel technique on all collections. Combination of research on stone processing techniques and sound frequency analysis