There's 2 adjustments for sound. One is for music, the other is for all other sound. It's an attenuation adjustment; meaning raising the values will impede sound and reduce the overall volume of the setting.
10 bucks says previous owner raised the music adjustment in the positive thinking that's suppose to increase the volume setting when in fact it decreases it. You'll want you music somewhere around -6, and sound around +2. I think these adjustments are near the end of the feature adjustments menu. Going solely off memory on that.
Richfield, MI
