Skude:

I'm having the exact same problems with my Audya. I replaced the Sound Board also but still have the same problems. With mine it's the Left Channel audio out and the volume/sensitivity with the Harmonizer.

I cant believe we would both have TWO faulty Sound Boards. The problem must be elsewhere. Where though? Thats the question!

Please keep me posted after you replace the Sound Board again. I would like to know if your THIRD sound card corrects the problems.
I'll bet it doesn't.
It is a very frustrating problem! I know!

Jim R.