What are the characteristics of ancient musical instruments bone whistle and bone flute?

Bone flute and bone flute are the distant ancestors of flute and Xiao in later generations. 1973, a number of bone whistles made of bird limbs were found at Hemudu site in Yuyao, Zhejiang Province. They are 4- 12 cm long, and most of them have 2-3 holes, some of which can play simple melodies, such as birds singing. According to experts' speculation, these bone whistles should be hunting AIDS at that time, and their age was about 7000 years ago. During the period of 1986- 1987, archaeologists discovered the 18 bone flute at the Jiahu site in Wuyang, Henan. These bone flutes are made of the limbs of birds of prey, and most of them have seven holes. The best preserved one can play a certain melody when unearthed. Jia Hu bone flute is the oldest musical instrument seen in China at present. Its discovery shows that our ancestors learned to make musical instruments at least 8000 years ago.