Talking Drum(超急!!!!!!!!!!!!!!!!!!)

Talking drums are part of a family of hourglass shaped pressure drums; in the Yoruba language of west Africa, these include "gan gan" (the smallest member of this drum family) or "dun dun" (the largest of the talking drums.) The drum heads at either end of the drum's wooden body are made from hide, fish-skin or other membranes which are wrapped around a wooden hoop. Leather cords or thongs run the length of the drum's body and are wrapped around both hoops; when you squeeze these cords under your arm, the drum heads tighten, changing the instrument's pitch.

仲有一大段, 慢慢睇

http://www.si.umich.edu/chico/instrument/pages/tlkdrum_gnrl.html