Default [Q] find file system of audio phonecall

Hi all,

sorry because my english is very bad

I looking for file (system?) manage audio during phonecall .

can you help me ?

because my problem it's my corresponding hear his voice when the phone is connected to my car stereo

and I have two ROM with and without this problème, I can post the file systeme, but I just find audio_effects.conf but I havn't experience with that...

does anyone have an idea ?

I can post different folder "system" to compare and understand for me please ?

Thank You for some Help