GSK

So this is my first post. I have successfully installed Lion 10.7.4 and now Mountain Lion 10.8.1. The one thing that is and has been a problem is the audio. Always after a reboot I need to go into Midi Audio setting and change the Mic and Speakers back to 44100.0 Hz and 2ch-16bit. They always reset to 192000 and 2ch-24bit which causes crackling in the sound. Anyone have a step by step to fix this problem? Is there a way to make the changed setting stick? Thanks, Gary