[Q] Low call sound problem with CM12 nightly Xperia L topic

According to the rules I have searched in this forum for solutions but there are none.
So i created this thread, Flashed with cm12 nightly 20150301, with out Thunderzap, and i am facing this very low call volume on phone ear piece as well as on head phones, I'm asking is there any available solutions for this problem? Will flashing of Tz kernel fix this?