#1 Dean Reed try Audio Comparer by Bolide http://bit.ly/audiocomparer

Even in trial mode it is very functional. The only drawback when it is in trial mode that you can't delete or move files from within the application itself which can be a real pain especially if you have a large audio collection.
I have tried several and couldn't find any that matched up to this one. I have actually purchased this one and I never ever buy software.
It compares audio files regardless of names, tags, size, quality or length and will even compare audio between several different file formats. It compares files by comparing it's actual sound data.
Another function which I found extremely useful was the ability to search for 100% duplicates or you can lower the threshold to find similar files. The comparison results are displayed with a percentage indicator to show how similar files are.

There is another give away available over on 'Shareware On Sale' called NeatMP3 Pro which is another an audio file organizer and tag editor. Sale the same time as this one if you want to give it a try.
http://sharewareonsale.com/s/neatmp3-pro-sale

Stamp ID3 is a really useful tag editor. You can download a free version here http://www.nch.com.au/tageditor/stampfree.exe

Oh yeah- and MusicBee can try to get song info for files with no names or info, just by the audio. Not accurate 100% of the time, but it's damn good most of the time & very helpful. Plus you can tag from last.fm through it & play internet radio where u can record some of it such as shoutcast, to an mp3.
It also converts files, finds duplicates, manages the i-pod & one of my favorite things: creates smart playlists better than itunes ever could. You could completely forget about having to use crappy itunes ever again & even manage podcasts & I think videos, too. It does a lot more, too... sorry...I just frigging LOVE musicbee. One of the best pieces of software ever made & REALLY has hardcore music fans like me in mind & has an extremely intuitive interface & such a huge myriad of options you'll spend hours alone tweaking to please your needs. I have yet to find anything I don't like about it!

Agree, MusicBee is the BEST. Hands down. Has epic music tagging abilities, skinnable interface & does everything under the sun that you could possibly want/need to do with your music files. It's my favorite media player & it's free & without any bloatware or nasty crap. Plus the support available from user community & developer is astounding. I honestly do NOT understand using any other music program, ESPECIALLY one costing money. Mediamonkey is just a sub-par, pathetic wannabe knock-off of musicbee with about ¼ the features & doesn't even work correctly AND costs a ridiculous price. Anything else just pretty much fails in comparison.

The first and *major* complaint I have about the company (rather than the software) is that they do *not* give prices of their software on their summary pages.

That's a *major* turn off for me and I *will not* even download such products from a company who compels me to download and install their product *before* they will tell me the price. That sucks.

Such companies are irreputable in my eyes.

I've now tried almost every different tagging (and media library/player) program out there, and most of the comments here aren't doing a good job of convincing me to try this one! I am about 80% through tagging my library of 1000's of music albums (mostly MP3s and WMAs) using Musicbee. Not only an awesome FREE media player and library, it's the best I have found for tagging automatically, semi-automatically or manually. Give it a try if you're looking for an alternative.

Installs fine on Win8.1 64 bit . No issues as far as I could see. Downloaded the last GOTD ver 7.1 and this overlayed the data files and was a seamless upgrade.

Okay, now I tried to download the program again in order to fix the right-click menu issue. Got the error message
"404 Not Found
nginx"

So I went to the KC Softwares site, downloaded the program there and installed it again, unticking the box that would put the program into the right-click menu.

There was a ton of bloatware to avoid during installation. In the end AudioGrail was installed and had actually kept the GotD registration, however, it still appeared in the right-click menu. And I also couldn't find the entry for that in the registry, so I'm going to uninstall again. There wasn't enough to keep me interested in the program in the first place, I'm afraid.

Thanks anyway.

Big plus for me: Network folders/files can be chosen.
Minus: Upon deciding I didn't want the program in my right-click menu ("Open with AudioGrail") after all, I found no way in the options to take it out again. Why isn't there a ticky-box to untick for that? Very annoying.

This may be a great program. Can someone explain just how it works. I've tried to use it to find duplicate music files but I am not having too much success.Of course I am just a Newbe since 1985. Oh well, back to the drawing board and find a new program.

MP3Tag is free and excellent.

http://mp3tag.de/en/index.html

Installed and ran program but the tag editor had a ERROR: Erreur JPEG #42. The program interface looks like a Windows 98 version of software. As you can see the Error message is in French......

Windows 8.1 x64, It installed fine on my PC with no problems.

FWIW - #1, #3 and #4 seem to not like this program for no good reason. #2 seems to have a gripe that I can not check out as I do not have 8.1 64b. But, the attitude of 1 through 4 is bad and I do not see any value in their comments.

This program installed OK and worked for me on W7 64bU. I am a simple person and the simple interface was fine. I did this on the basis of what #5 said who has been using for many years. Thanks

Installed just fine and registered. Thanks #5 for the tip on preforming a function prior to closing the first time. Number 3 if you watch and read the popups when installing the software you would or should have noticed the options that were available as far as added short cuts etc to your PC. Clicking next without looking/reading the information in the pop up box is a bad idea and how a lot of junk gets installed.

All my OGG music files got messed up. It put wrong tags all over the place. Uninstalled.

Registerd fine on Win7 Ultimate, but also experiencing repeated crashes while trying to load my music library. "Corrupted (particular mp3 file) file"

I am trying to sort a large number -- a few thousand -- of mp3 files. I did go in and move the problem files to another directory, but it would then find another corrupted file and crash again. Spent about an hour with this.

There should be some way to load the files that are good and skip/ignore corrupted files. Hoping the developer will chime in with some answers, but for now, it is a big thumbs down! Pity, it looks like a good idea.

All the "features" are icons in the right "pane" of the main window. Actions require a DOUBLE-click(!) of one of those icons. Sometimes nothing happens, sometimes it tries to perform the action on the wrong album/song, and sometimes it works as exptected.

The window is not resizable and the separator between the left side (files list) and right side (action icons) is not movable. This all adds up to a bizarre, non-standard, non-intuitive interface, if you ask me.

Non-resizable windows? Really? In 2014?!

I have been using this program from GAOD since I joint their email list, about 7yrs. AudioGrail has been on every computer since, as it became available on GAOD. It has been my backup tool when other program were unable to source the IDTAGS.

Only problem I had loading on windows 8.1 was you need to access and load a music directory as soon as you enter the registration details. I loaded AudioGrail setup and entered the registration details then closed the program, on rerunning the the registration details had not been taken and was presented with the purchase/registration pop-up.

So don't forget to load some music files, perform one of the functions before closing it. Then reopen to check that registration took.

I don't see where and why i will ever use this progam. Useless, should be freeware.

Really didn't care for the URL shortcuts it put on my desktop - no option to not do this. Not a deal breaker but I need to be told (asked) prior to installing that it's going to do this. The UI is fairly clumsy as if it hadn't been updated since the win 98 - XP years. You can't select multiple files, it's one or all and even then it's abilities are very non-intuitive. There doesn't seem to be any logic to how it groups the files it finds. I know exactly what the song, artist, and album are but it tosses "unknown" out. Of the 3 files I tried to get information on, it found only one that was correct and that appeared to be luck because the name, album and artist were all right there but the results could hardly have been farther off. This is a complete fail for a program in my eyes. I'm sticking with MP3tag. Free and it worked as I expected it to from the beginning. http://www.mp3tag.de/en/

The installer didn't work for Windows 8, 64 bit. So, I went to the homepage, and downloaded the installer myself. It installed and registered using the details from the GAOTD installer ... but the program crashed repeatedly while trying to scan my music collection.

Sorry GAOTD. This is about the worst quality product i've seen on GAOTD. "F" for First-class Fail.

"Duplicate File Finder": is there an option of finding pairs of files with exactly the same audio part but possibly different tags?