Cut a bamboo into 30〜40 centimeters lengths ,
At this time, leave a knot of bamboo on one side .
(The knot of bamboo will be at the bottom of sax )
Make a hole on knot of bamboo with drill(10φ) .
Wash and sun drying the bamboo .
(dry it fully , about 1 or 2 months)
the color of the bamboo will change from green to light brown(dead bamboo) .
if you have a gus burner , grill the bamboo to make it brown .
(the bamboo has firmed , I guess).
So , we are ready for make a bamboo sax .