The most easily identifiable feature is the double-bowl shaped body carved from
mulberry wood, with a thin membrane covering the top. The membrane is of stretched
lamb-skin in the Persian tar, or the
pericardium of an ox in the
Azerbaijani (or Caucasian) tar. The
fingerboard has twenty-five to twenty-eight adjustable gut
frets. The Persian tar has three double courses of
strings and a range of about two and one-half
octaves. The Caucasian tar has 11 strings in five paired courses plus a
bass drone. The long and narrow
neck has a flat
fingerboard running level to the membrane and ends in an elaborate
pegbox with six/11 wooden
tuning pegs of different dimensions, adding to the decorative effect.
The strings of the Persian tar It has three courses of double "singing" strings (each pair tuned in unison: the first two courses in plain steel, the third in wound copper), that are tuned root, fifth,
octave (C, G, C), plus one "flying" bass string (wound in copper and tuned to G, an octave lower than the singing middle course) that runs outside the fingerboard and passes over an extension of the nut. Every String has its own
tuning peg and are tuned independently. The Persian tar used to have five strings. The sixth string was added to the tar by
Darvish Khan. This string is today's fifth string of the Iranian tar.
Modes of play The instrument is held high on the breast, plucked at the centre of the body using a small
brass plectrum known in Persian/Azerbaijani as a
mezrab/mizrab. That is held in the right hand and used in a combination of
upstrokes (
alt) and
downstrokes (
üst) along with occasional
tremolos in both directions. Meanwhile the
notes are selected by the placing of the fingers of the left hand, with notes sometimes bent by a motion of the placed finger as in
blues guitar. The addition of an unplucked note as a
trill on top of the plucked bass note is known in Azerbaijani as
lal barmaq – literally "muted finger"., while a somewhat similar effect called
jirmag is achieved by using the fingernail to strike the string. This gives a more poignant 'scratching' sound. == Azerbaijani tar ==