Tennessee music box
n.— «Dulcimers come in all shapes and sizes—peanut-shaped models, triangles, graceful ovals and rectangular contraptions often called “Tennessee music boxes.” They usually have three or four strings and sound like a cross between a mandolin and a guitar, but sweeter-sounding, more fluid and droning than both.» —“Starry Lullabye” by John Nova Lomax Nashville Scene (Tennessee) Aug. 24, 2006. (source: Double-Tongued Dictionary)