Chinese traditional music

Insert 3 bamboo pipes of different lengths side by side into the gourd. The lower end of the bamboo tube is embedded with copper reeds. The long bamboo tube in the middle has 7 sound holes, 6 in the front and 1 in the back, which can blow out an octave from g to g1, which is called the main pipe. The other two are vice pipes with only reeds and no sound holes. The gourd handle has an air hole or a small bamboo pipe inserted to form a mouthpiece. When blowing, the main pipe plays the main melody and the vice pipe produces a single tone to form a harmony effect.