After the Aryan tribes moved into India and greater Persia, their cultures began to diverge and two different yet related musical systems developed. The Persian system became the basis for music of Middle Eastern countries and was also influential in Eastern Europe, Spain, France and Italy. During the Greek period in ancient Persia, the Indo-Persian system influenced Greek music and thus found it's way into Rome. During the Sassanian era, instrumentalists were invited to Persia from India and it was the later Perso-Afghan master, Amir Khosrow who brought Persian musical concepts and the setar to India.
