I just got a used 2000 Ford Contour last night, and on my way home, I realized that when I was playing my CD, the volume would get really quiet when there was a lot of bass. So the volume would dim, come back, dim, and so on. However, it doesn't always do that. And it does it the most on my custom CD. I realized today that the front of the player says, "Automatic DNR." I'm assuming that "DNR" stands for "Digital Noise Reduction." Could this DNR have something to do with this?? It sounds bad and I don't like it. Any suggestions??