I started having a problem with my receiver in stereo mode when I hooked up a new CD changer in my system. When I play CDs in stereo mode and turn the sound up anywhere from -22 to -8 it doesn't seem like the sound increases. If I turn it up to -7 it gets really loud and remains that way until I go down to -22. Then it sounds like something clicks off in the speakers & it goes to the regular sound. The -22 to -8 is still loud but it doesn't increase in sound. Anybody have any ideas. I am running the CD changer into the PCM in on the back of my receiver by optical cable. I've never used optical before. Could the connection to my "PCM in" be screwing everything up. However I tried the CD in my DVD player and the same thing. I'm not sure what else it could be. I haven't noticed this happening until I added the CD changer. Could something be wrong with my receiver or is it one of my connections? Any help or recommendations?