Itunes volume question

[Oyeve]

Hi all. I have several thousand songs on my ipod. The volume of a lot of the songs are low so I use the volume increase utility in itune and raise the volume on the song. I have done this to several hundred songs. My question is this. If I highlight all the songs in my library and raise the volume, say, by 30% will it raise the volume of the song I already raised, or will is itunes smart enuf to adjust for that? I dont want a song that was already raised 30% to end up being raised yet another 30%.

Thanks.

 

[HN]

Normalize volume with MP3Gain and then boost volume with euPOD.
Guide here - http://dapreview.net/content.php?article.133