Regarding the B to bd interval, this is certainly not common.
But...
This would be a touch of Mahur I believe.
Mahur is Persian originally (=Ajam, Persian).
But in the Ottoman tradition this became a compound maqam, being a mix of Mahur and Rast.
Dimitrie Cantemir writes:
'...makam mahur which employed the secondary scale degrees buselik and mahur.' (Music of the Ottoman Court').
There seem to be two different versions of Mahur today, the Turkish and the Arabic.
The difference is that the Turkish one has two additional notes; Sikah and Awj.
The Arabic one has only one; Mahur (B).
But...
'...MAHUR, is also incorrectly notated by present performance standards. The notation indicates the pitches Puselik and Mahur for the 3rd and 7th
degrees...Musicians...,however invariably perform MAHUR with the same sacle as RAST, i.e., with Segah and Evic as the 3rd and 7th degrees..'
(From Makam, Modal Practice in Turkish Art Music', Karl Signell).
It seems the Arabic version is in the middle, and is described as jins Rast + jins Ajam on Nawa.
[url]http://www.maqamworld.com/maqamat/rast.html#mahur |