"You can't 'uncompress' an MP3 back to having the dynamic range it had before." True. In fact I would rather compress old music to bring it to the same dynamic

"You can't 'uncompress' an MP3 back to having the dynamic range it had before." True. In fact I would rather compress old music to bring it to the same dynamics of the new one, then and only then normalize everything. I know it's almost a crime; I did it just on my player and would never give these tracks to anyone.