To normalise the volume level I'd have thought you would need to pre-decode the entire file to find the maximum levels. That would take (compatatively) ages and one of the big selling points of the product is the speed at which you can access your music.

Normalisation is really an encoding issue. I have Audio Catalyst set to automatically normalise if the maximum gain is less than 91% or greater than 98%.

I'm not sure if there's any software around that will normalise an already encoded MP3 (it would need to decode and then re-encode so I guess it would be lossy).

Rob