Some months back I bought an mp3 player (Zune)  which displays album art from mp3's that I download.  It's pretty cool to have that.  How does one go about adding artwork to their mp3's produced in SonarX.   I noticed that Cakewalk Publisher has what looks like the ability to upload art with music, does that work?  How generally do people do it so that the art appears with mp3 playback.  Sorry for my ignorance on something that must be elementary to a lot of you.

AFAIK, the album art is not added to the MP3 file itself. I have a Sansa Fuze and the album art is in a separate file with a .ALB extension in the folder with the MP3 song files.  In Media Monkey, the album art is in a file called folder.jpg and when I sync them to the Sansa, it creates the .ALB file from the JPG. Take a look at the files that are in the Zune. 

... Actually, you can embed a .jpg into an .mp3 file.
 
http://www.richardfarrar.com/embedding-album-art-in-mp3-files/

I just do it all in iTunes (all .mp3 details) cause I'm too lazy to find another way and it's easy enough...

I'm sure there are some good, free programs out there for it. Google, my friend holds the answer.

If you have a Zune Player, don't you have the Zune Software, then? Right click an album, and click "Add Album Art".

This is what you want to use to add album artwork (as in inject into the mp3 file itself):
http://www.mp3tag.de/en/

I wouldn't trust that iTunes or Zune software etc would do this for you, as I believe those applications create separate library files for the "metadata" and/or assume that the additional image files are in a specific location.  All that works well if you limit yourself to those respective apps and that you never have to reimport all your mp3 files due to a system crash or upgrade, etc.

But using mp3tag you can ensure that the image and any other metadata stay with the mp3 file.  Plus you can inject a whole bunch of other information into the file as well as multiple images (and label the, as front cover, back cover, etc.).

  And sharing just that mp3 file (say in an email attachment) means that all that additional info and images get carried along in the mp3 file

Hope that helps

I teach a class at the local college and one of the things I have students do is submit MP3s to music libraries.  The MP3s should have embedded art work with contact info.  I suggest using iTunes (I really do not like itunes for other things) as Matt suggested.

In iTunes you scroll down "Get Info" and fill everything in.  I kinda think using iTunes is the best idea just because it is the most used music app.  Music supervisors for film/TV and people working with music libraries tend to use iTunes as the weapon of choice.  I think it would be the same with consumers.

So you need to get good with something like photoshop.

Peter in the above post has some very good points.  To make sure the "metadata" gets attached in iTunes I will copy the MP3 out of iTunes into another folder.  It has worked out for me,  but I have not check out MP3tag and other programs. 

+1 on mp3tag. It's a fantastic program for any tagging needs you might have.

I don't mind iTunes and use it often and it certainly can help with doing a lot of mass edits and so on.  Album artwork seems to be a little inconsistent though.  I think if you use the "get info" menu option as Jimbo 88 suggests above you should be okay, but I have had instances where I've "lost" album artwork from files because I made the assumption that they were always embedded in the files themselves.

What I have found is that sometimes iTunes, Zune, Windows Media Player,etc. store the image in the folder where all the album tracks are or in a specific proprietary library file.  I think this might be to avoid the "performance hit" of updating each and every mp3 file when you import a whole album or have iTunes retrieve missing album artwork (and if you stay within the app you won't notice the difference).

Although these tools may do what you want most of the time, I prefer not to rely on them and have found that mp3tag had never let me down.  It's also good at all that mass editing stuff too, and since it's free you can try it easily....and maybe drop the developer a donation.  FWIW, this tool has been around for a while and I believe is a popular app, so no worries of it going away any time soon.

Ps: ditto Jimbo 88's comments about putting all your contact info and web links into each mp3 file.  It's good advice

+1..., MP3Tag. And a small overlooked detail, it's free. Shhhh...