itunes question

Hi,
Hope this is the right place for this.
I have a large amount of music in my itunes. Most of it burned off of cds now sold.
I have found an alarming amount of duplication of the same tracks in itunes.
Is there a program I can run my itunes through to eliminate the duplicates.
I tried a small sample of music files run through several different programs a few years ago.
But they would eliminate the same track by the same band even if one was a live version with a completely different length.

Are there better/more sensitive programs out there now?
Thanks,
Pwpw
-I'm looking at 800GB of music.

 

I have used the 'display duplicates' in the past. My experience is that it will enable you to identify and erase the duplicates in itunes display.
Once again if I simply delete all duplicates, it will:
1. erase every duplicate it sees, including same song by same band even if the length of song is different. As in a live version vs. studio version.
2. it will not erase the duplicates on the HD 'itunes repository' from which itunes pulls it information/songs.

I want to go to my HD's itunes/itunes media/music and go into that folder and eliminate all true duplicates.

Thanks for the suggestion. I just hope there is some way I will not have to go into my itunes/itunes media/music folder and manually go thru every artist/album and erase every duplicate.
Pwpw