However, my think is this; I doubt you would gain anything because part of the information has been lost forever, so you can't get it back. Even if you get something back..but it may not be what has been lost. So let us know what your findings are. Good hunting.
I have approximately 5700 songs in my library, I used Itunes to purchase my music and to encode my music library. Some of the songs I have are in AAC 128 bitrate while others are AAC and MP3 320 bitrate. I want to encode all my songs to a higher 320 mp3 bitrate, my question is will there be a "gain" in music fidelty when I encode the 128 bitrate songs to 320? I don't need worry about storage as I have enough room on my ipod and hard drive, I'm just wondering if my music will gain anything going from 128 bit to 320 when it was encoded at 128 to start with. Thanks for your help!