The Mbira, sometimes referred to as a "thumb piano", is a handheld soundboard made of wood, with metal keys that are plucked to produce sound. To amplify its resonance, it is often placed inside a ...

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It's sometimes called a thumb piano. Mbira is made from a wooden block, about the size of an adult hand. On top of the wood are thin metal strips that are played by plucking with the thumbs.