I hope some of the more technically-oriented members of PD can help me out here. I've noticed the volume of many of the mp3s I've downloaded varies greatly, and this causes issues when I try to listen to them in my car CD player. That is, one song requires the volume to be high, but then the next song is way too loud.

So here's my question: is there software or other tools I could use to "even out" the volume of my mp3s so they are not so dramatically different? Any help is greatly appreciated.