Setar is a plucked string instrument and made of wood, metal and gut. Setar belongs to the family of Tanbour. This instrument is played in a sitting position. Its sound box is pear-shaped and made of wood. The sound box is covered by a wooden board and the bridge is placed on this board. There are usually holes on the soundboard to make the sound out from the box. The neck of Setar is slender and in the form of solid tube; the upper surface of the neck is flat and its backside is half round. There are 28 frets on the neck made of gut or nylon. Setar has four metal strings; the fourth string was added by a musician called Moshtagh Alishah and this string is now known as Moshtagh. The strings are attached from one side to the tailpiece at the bottom of the box and after crossing the bridge and the nut, they are wrapped around the tuning pegs on the head.
As you can see in the picture below, this instrument is played by index finger nail. In general, the sound of this instrument is very low and it is mostly performed as solo. However, it is also used in traditional Iranian groups. Among the famous masters of this instrument, we can refer to Ahmad Ebadi and Saeed Hormozi. Eshghi was a famous luthier of this instrument.