What term refers to a hollowed cylinder of wood with a narrow longitudinal opening, often associated with ancestral voices?

The term that refers to a hollowed cylinder of wood with a narrow longitudinal opening, often associated with ancestral voices, is indeed the Atingting Kon, commonly known as the slit gong. This traditional musical instrument produces sound through resonation when struck, and its design allows for a unique tonal quality. The slit opening is crucial as it influences the pitch and richness of the sound, making it suitable for cultural and ceremonial purposes—including rituals that involve invoking ancestral spirits.

In contrast, the other instruments mentioned serve different musical functions and do not share the same structural characteristics. The djembe is a hand drum from West Africa that has a goblet shape but does not feature a longitudinal opening. A gong is a metallic instrument primarily used for producing a deep, resonant sound and lacks the hollowed wooden structure. The didgeridoo, while also a wind instrument similar to a hollow cylinder, is traditionally played by Indigenous Australians and does not have a longitudinal slit but is instead circular in design. Each of these instruments has its unique sound and cultural significance, which distinguishes them from the slit gong.