Harp or Chang (in Persian) is an ancient stringed instrument and among the most well known instruments of ancient Iran. In Persian literature, this instrument is mentioned a lot and the Venus planet is considered as harp player. A tablet that is found in the site of Chogha Mish (in western Iran, Khuzestan Province) and dates back to the fourth millennium BC and the Elamite era shows a harp player. This harp has 6 strings. In the past, the harp in Iran had 4 strings and this number reaches 11 in the Sassanid era and 35 in the Islamic era. The creature of harp originated from the creature of bow (weapon); the bowstring was shaken by shooting and made a little voice. The initial harps were like a bow made of reed and wood with a string (from gut) installed in it.
The last Iranian harp player in the Safavid era was “Sultan Mohammad Changi”.
The Harp is played with fingers and the technique of playing it in the world is eight-fingers, but the technique of playing it in Iran, according to information extracted from ancient documentation, is ten-fingers.
The harp is often made of walnut and maple wood.