The gheychak also known as ghejak, qeychak or qejak is a bowed fiddle of the Persian folk music played in the southeastern region of Iran. There are two large holes on the upper side near the fingerboard and one on the lower tip, which is covered with a skin membrane. There are four main strings and eight to sixteen sympathetic strings, which have been eliminated in the context of Persian art music. The sound box resembles an upside-down anchor, which is carved from a tree trunk and is placed vertically on the player's lap. The upper and lower sections are separated by two oval indentations on the right and left side, which give the gheychak a distinct nasal sound. The other instruments of Indian subcontinent such as sarangi, saringda, esraj and dilruba.