Default OmniRom BUG, microphone isn't working well.

omni-4.4.4-20140813-i9300-NIGHTLY is the version I installed.

I had Cyanogenmod and move to OminiRom recently.
I have these music instrument tuner apps which take the input form the microphone. After moving to OminiRom, those tuner apps are not functioning well. All the apps have a hard time judging and measuring the input they get. They used to work well before.