The double-pipe mabu is a reed instrument unique to the Yi people. The "horse" in Yi language is a bamboo pipe, and the "cloth" is a reed pipe, which means a musical instrument played by inserting a reed pipe on a bamboo pipe. Spread in my country's Sichuan Liangshan and Yunnan Yi areas. It consists of a whistle, a bamboo body and a horn mouth.

When playing the double-pipe mabu, the pipe body is placed vertically, the index finger, middle finger and ring finger of the left hand press the three holes on the top, and the mouth contains the upper reed, and the cyclic ventilation method is used to play.

Among the Yi people in Liangshan, many mabu lovers can make mabu of various pitches, and there are skilled craftsmen who make mabu in each village. Mabu is produced by using the vibration of the reed to excite the air column in the tube to vibrate. Each sound hole can only play one sound, and it cannot be overblown. The clever Yi people came up with a very ingenious and meaningful method. Instead of using the diatonic scale in the arrangement of the holes, they adopted the arrangement method of the pentatonic scale, which effectively solved the limitation of Mabu's vocal range.

Five-hole Mabuyin is listed as: c1, d1, e1, g1, a1, c2. The six-hole Mabuyin is listed as e, g, a, c1, d1, e1, g1. The seven-hole Mabuyin is listed as: g, a, c1, d1, e1, g1, a1, c2 or e1, g1, a1, c2, d2, e2, g2, a2.

The timbre is crisp, bright, and the volume is relatively loud, often used for solo performances. The playing technique and solo repertoire are the same as the single-pipe Mabu. Some of the more skilled performers in the folk also use their teeth to press the reed to shorten its effective vibration part, increase it by a few more notes, and further expand the range to twelve or fourteen degrees, thus satisfying the general performance requirements. needs.