The first group is called Shur and consist of:
Dastgâh-e Shur
Dastgâh-e  Navâ
Dastgâh-e Segâh
Âvâz-e Bayât-e Tork
Âvâz-e Abu-Atâ
Âvâz-e Afshâri
Âvâz-e  Dashti

Shur is considered as the mother of all of the other systems [Countinue…]