Hyundai Repair: 2007 hyundai santa fe radio problem, hyundai santa fe, new santa fe

Question
I have one of the first SUV's made for the 2007 year, and I'm having a problem where the sound, base, treble all seem to drop off when the car is moving. It changes volume/quality frequently. I've seen the service bulletin on this, but this is happening constantly and is much more than an occasional thing. It never settles and just keeps on changing all of the time. I'm meeting with Hyundai USA about this next week. Any ideas as to the cause, or solutions? Help!  

Answer
Hello Sheri,
Sorry to hear that you are having problems with your new Santa Fe. First of all , I would like to say "good choice". It is a really nice, safe and reliable SUV. Since you are already scheduled to meet with the Hyundai field engineers, I think you do not need my advice. I am sure they will come up with the best solution for you. Keep me updated please.