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The hardingfele or hardanger violin originates from the southwest of Norway. In common with the violin it has four playing strings, but there are also four or five sympathetic strings which run underneath the fingerboard. The playing strings are often tuned in fourths and fifths, which, coupled with the effect of the sympathetic strings, make the instrument very resonant. The belly is raised and highly decorated and the bridge is flat, making it possible to play two or sometimes three strings at once – a feature of traditional hardingfele music.