According to this theory, there was a culture, or group of cultures who were so successful that they spread throughout Europe and parts of Asia. Within this family there are several major groups. Indo-Aryan is a group which has special significance for India because this is the language and culture which generated the Vedas and other classical texts of ancient India. The classical music of India is said to have its roots in this culture. The connection between Indo-European expansion and Indian music may be seen in mythology .
Mythology refers to music being brought to the people of India from a place of celestial beings.
However, some are of the opinion that this mythical land could actually be Kandahar in what is the modern Afghanistan. Further evidence may be seen in musical structure. It is probably no coincidence that Greek music was also based upon seven modes. The link to Sanskrit is another strong indication of Indo-European roots. Many of the earliest texts were written in Sanskrit.