Ending a call gives temporary distorted sound topic

I seem to have a very weird, consistent issue with every custom rom I flash.

Every time a phone call ends, my sound gets very distorted, until I lock/unlock my phone. (Navbar sounds, lock sounds, every UI sound)

This bug happens on official ROMs and unofficial ROMs. Actually, there hasn't been one ROM yet where this hasn't happened to me.

So far I've found one other thread mentioning this problem but with no set solution.
http://forum.xda-developers.com/omni...0/post58428771

Does anyone have any idea why or how this could be happening?