The scale of the Bunun consists, fundamentally, of natural overtones with the Fanfare melody of do, mi, sol, do. Most songs are choruses, a few being solos. Choruses are normally sung in two parts with the harmony of the minor third, the major third, the perfect fourth, the perfect fourth, the perfect fifth, and the perfect eighth. Re is rarely used, and mi or to micro-tonal mi. The microtone around mi is a special feature not only of the Bunun but also of all the tribes of Kan san tsu. The most peculiar song of the Bunun is Pasibutbut, a song of the millet harvest festival in the chromatic style. They especially favor musical bows, Jew's harps, and the overtone style. Mr. Takatomo Kurosawa, a Japanese musicologist, tried to prove the establishment of a pentatonic scale from the overtone produced by the musical bows.