Baluchi classical music

Reading about different music forms from different regions is very interesting, especially when you discover similarities with Indian classical music.I found a very interesting link about Baluchi music( music of a group of people originally from Iran who migrated and settled in Baluchistan and Afghan).
The genre shervandi is the equivalent of our classical music. They perform very similar to our classical concerts by starting with an alhan(alaap) in one of the different modes called zahirigs(equivalent to our raga). They may also link several zahirigs together. This is followed by a composition known as zimol which is measured just like our Indian thumri/khayal/keerthanai. After the composition there is a measured zahirig very much like in hindustani and neraval in carnatic.
The big difference I found was that they may or may not sing the zimol in the same zahirig as the alhaan. Another very interesting thing is that the musicians mostly don't know the name of the zahirig they are singing. They follow the melody of the composition. Only the shervandi fiddle performers, have an extended and clear view of the zahirig-s as modal types.

This link is a very good read for those who are very intrigued by this:

http://www.tavoosonline.com/Articles/ArticleDetailEn.aspx?src=59&Page=2