Conversation so far:
Did the Manchu people create the Octagonal drum?
It is said that octagonal drum originated with the snare drum of the Eight-banner military and the melody was made by the banner soldiers.
What was the Octagonal drum used for?
Octagonal drum is a type of Manchu folk art that was very popular among bannermen, especially in Beijing.

Question: What material was the drum made from?
Self-contained rewrite: What material was the octagonal drum made from?