Geçki

[1] It is a form of modal interchange, used specifically within Turkish makam music.

As with modal interchange, it is easier to do a geçki between two similar makams.

Neva and Hüseynî share many of their features, including their notes.

A geçki can also happen through the change in the Durak (the tonic note).

While performing, if one were to flat the 6th note of Rast, they would get Basit Suzinak.