Substrate in Sanskrit and Iranian?

[Oghurkhan]

Wich languages are the most likely candidates? Darvidian? Austro-Asiatic? Burusho? An unknown language? Uralic?

[Jaska]

Under Iranian: Elamite.
Under Indo-Aryan: Dravidian, Munda.

[Oghurkhan]

Thank you very much Jaska. I wonder what people lived on the Iranian and central asian lands before the Indo-Iranians came. Maybe they were a Elamo-Dravidian people????