The Indian santoor is an ancient string musical instrument native to Kashmir, with origins in India and Persia . A primitive ancestor of this type of instruments was invented in Mesopotamia (1600-911 BCE). The santoor is a trapezoid-shaped hammered dulcimer often made of walnut, with seventy two strings. The special-shaped mallets (mezrab) are lightweight and are held between the index and middle fingers. A typical santoor has two sets of bridges, providing a range of three octaves.