MP3Gain sounds interesting. I've heard of it before, but never tried it.
I went to
http://mp3gain.sourceforge.net/download.phpLooks like v1.2.5 is the latest stable version.
Couple of questions:
1) is there an undo or should I copy the files first?
2) if I add a few files later, and want them to be about the same as the existing ones, how do I do that?
Thanks,
Notes