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A nyckelharpa (Swedish: [ˈnʏ̂kːɛlˌharːpa], "keyed fiddle", or literally "key harp", plural nyckelharpor) is the national musical instrument of Sweden. It is a string instrument or chordophone. Its keys are attached to tangents which, when a key is depressed, serve as frets to change the pitch of the string.
The nyckelharpa is similar in appearance to a fiddle or the big Sorb geige or viol. Structurally, it is more closely related to the hurdy-gurdy, both employing key-actuated tangents to change the pitch.