Songs that refuse to be leveled!

[Charade]

Hello!

I would like to know why there are songs that don't change their volume no matter how many times I try to level them. All my library is MP3 and the titles are written in occidental alphabet. There are still three stuborn songs from -6.4 to -1.6, and hundreds others between +1.0 to +14.1. I analyze, level, re-analyze, re-level... Nothing.

I hope you have some clues for my problem!

Thank you!

Charade

[Lowlander]

Maybe you're leveling a format for which this isn't supported? Maybe the files are read-only?