The Royal Museum for Central Africa has a rich collection of over 8,000 musical instruments, 85% of which originates from Congo. Together with the thumb piano, the membrane drum is probably the most characteristic musical instrument south of the Sahara. The membrane drum is essential to combined play in the musical accompaniment of rituals and ceremonies, as well as of dance performances that are more geared towards relaxation. This instrument is therefore indispensable in the music and dance culture of sub-Saharan Africa.In organology, the science of musical instruments, membrane drums are divided into various categories on the basis of their shape. A drum can be open or closed, single or double skinned. Drums can be cylindrical, cup-shape...