The structure of the octave

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The Zhuang nationality's species, the drum body is flat and round, made of miscellaneous wood, preferably a section of kapok tree, hollowed out of the log cavity.
The size of the drum varies from 13.5 cm to 26 cm in diameter, the height of the drum frame is 5.7 cm to 11 cm, and the wall thickness of the frame is 1.3 cm to 1.5 cm. Both ends are covered with cowhide, sheepskin or thin wood. For the wooden surface, the thickness of the board should not exceed 0.4 cm; for the leather surface, the drum skin should be fixed and tightened with bamboo nails. There is a small iron ring on one side of the drum frame, on which a colored cloth strip or drum rope is tied, and a sound hole with a diameter of 1 cm is drilled on the other side.

The structure of the octave

The Eight Music Team of the Gelao is called the Eight Immortals Band, so the eight-tone drum is called the Eight Immortals in the Gelao. This is a small hand drum with a handle. The drum body is round and has different sizes. The diameter of the drum surface is 13 cm to 25 cm, and the height of the drum frame is 5 cm to 10 cm. The drum frame is made of wood, and both sides are covered with cowhide, sheepskin or For other animal skins, a drum handle made of thick lead wire is placed on one side of the drum frame. The outer surface of the drum body is painted with red lacquer and painted with gold traces.
Reference materials and contributors
八音鼓(百度百科)

Involving musical instruments

Eight-tone drum (pinyin: Bā yīn gǔ), also known as the Eight Immortals Drum. Popular in Guangxi Zhuang Autonomous Region, Guixi Longlin Autonomous County, Xilin County and the border of Guizhou and Guizhou. It is the Zhuang and Gelao musical instruments. Named for its use in the folk instrumental ensemble eight bands. The Zhuang language is called Zhongyi, which means smaller drum.