The đàn tam (chữ Nôm: 彈三) is a three-stringed ("tam" means "three") fretless plucked Vietnamese musical instrument. It has a long fingerboard, and the body is traditionally partially covered by a snake skin stretched over a rounded rectangular resonator. It is similar to the Chinese sanxian. It is used in tuồng theatre as well as nhã nhạc.[1]
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