Wikipedia
Sumui
The sumui ( flute) is one of the most ancient and commonly played instruments in the musical tradition of Tripura. Sumui, is the most perfect and least mechanical of all the instruments. The sumui is very dear to the tribes of Tripura. It is made of bamboo. There are two types of sumui, one having 7 (seven) holes and the other having 8 (eight) hole. Mostly found are two manipulator characteristic features:
a) Those held along the mouth
b) Those held across the mouth