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Bac Ninh , Viet Nam

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36 stringed musical instrument

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Folk music

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Bamboo flute

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4 to 8 singers

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There are a large number of Quan Ho melodies. A pair of female singers sing a ‘challenge phrase’ (cau ra) and a pair of male singers sing a ‘matching phrase’ (cau doi), which repeats the melody phrase. Once they are finished, the order is reversed. The male singers will sing their challenge phrase with a different melody, like musical ping pong.