Editing Tar (string instrument) (section)

=== 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 mechanisms for stringed instruments|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.