Poor call quality while using CM based roms

[AC Question]

Hey everyone!

I have a samsung s4 (I9500), When I'm using a CM based rom whether it be CM itself. Slimkat, AOSP based, AOKP based etc' I get very poor quality audio during the calls,
The recipient can barely hear me and vice versa.

Did anyone ever had this problem and was able to overcome it?

Thanks!