The drums are a common product of native craftsmanship.
A set of drums can also be played (by left-clicking in the inventory bar) once every 10 days. Doing so will slightly replenish the sanity of the expedition (by +10 points) and adds an aggro chance of +30% for 15 days.
Multiple drums share cooldown ticks, meaning that only the cooldown of one of them will tick down when a day passes. When the first is off cooldown the second will start ticking down. Tuned drums and drums are on different cooldowns.
The drums can be acquired by:
- trading with natives at a village.
- trading with shamans at a shaman's hut.
- found among the loot at a stone statue.
Tuned drums are an improved version of drums.