Two Aztec slit drums, called teponaztli. The characteristic "H" slits can be seen on the top of the drum in the foreground.
An example of a slit drum from the Philippines known as a kagul by the Maguindanaon people[4]
Wooden slit drums from Vanuatu, Bernice P. Bishop Museum
Ekwe drum of the Igbo people
Banda-Yangere animal-shaped slit drum