Tanbur: Persian Musical Instrument
A long-necked, plucked instrument with adjustable frets. The eight strings are grouped in pairs tuned A, C, D, D; the two low strings are made of brass and the others of steel. Although the instrument in normally played with a plectrum, a bow can be used as well. A twang or vibrato effect can be achieved by slightly twisting the instrument after a note is played.