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The teponaztli is a type of slit drum, a percussion instrument made from a hollowed tree trunk with a lengthwise slit. The edges of the slit are often of different thicknesses to produce different pitches. Unlike membrane drums, slit drums are classified as idiophones, meaning they are resonant solids.1

These instruments are found globally and can range from large, hut-enclosed tree trunks to small bamboo instruments. The teponaztli, specifically, is a Mexican slit drum of Aztec origin, often featuring an H-shaped slit that produces two distinct pitches. Slit drums were frequently used in rituals, sometimes associated with magical attributes, water, death, and resurrection. They also served as signaling instruments, capable of transmitting messages by mimicking human speech inflections. Elaborately carved animals often adorned these drums.12

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