WBRW wrote:

I recommend you use the "MP3GAIN" utility,
which will let you losslessly
normalize your MP3 files to a "safe", non-clipping volume level. If
you try to increase the loudness value too much, it will warn you that
the MP3 file will start to clip. And in automatic mode with the "/r"
switch, it will normalize all of your MP3 files to a nearly constant
RMS volume level (again, always below the level of clipping) so that
you don't have to turn the volume up for a dynamic '70s or '80s song
and then have your ears blasted away by a modern "hyper-compressed"
song. Or, you have the option of applying a constant volume change to
an entire collection of songs, so that the relative loudness
differences between the tracks of an album will be maintained, for
example.

MP3GAIN is available for download he

http://www.geocities.com/mp3gain/


Anyone compared this with replaygain? They seem to be doing similar
things, but replaygain is doing it with tags rather than modification of
the data itself http://replaygain.hydrogenaudio.org/