transfer music without syncing library

Hi again, tt2. Sorry to keep at this, but here's what I'm seeing:

• I open Music by selecting the new library. It shows exactly what I put into it, a selection of one artist's work.
• I go to Preferences>Sync library, and it begins. I get a message that it's updating the cloud library and it may take a few minutes.
• Within just a couple of minutes, the library is no longer displaying only the selected work. I am now seeing my entire other library display, and many of the songs are grayed out as though in process of uploading.
• Assuming something has gone wrong and my entire other library is syncing, I deselect "sync library."
• The new library now only displays the single-artist content I put into it.

I guess I just can't find a way to make it stick to the one library.

Possibly relevant: The music in my new library is also in my main library. I dragged it into the new library from the original download folder (not from the main library). When I look into my main library files, I see

• Music>iTunes Media>Music>[actual folders containing all the music files in my main library]

When I look under Music>[new library name], there is an inaccessible-to-me file called "music library," but there are no files of music. When I Get Info about a song in my new library, the file resides in my main library, per the path above.

This tells me that I have not so much created a "new library" as, effectively, a playlist, and the app continues to regard the main library as my only library.

It sounds like this is not what you're experiencing with your two libraries, so I'm wondering where I've gone wrong ...

Again, thanks,

cuID

Just what I was looking for, tt2, and thanks very much for the clear, helpful answer.

But I gotta say, it didn't go quite as planned. I created a new library, and it appeared to self-populate with every song I'd ever purchased from the iTunes store (about 500). I removed all those from the library, and added the content I'd wanted to sync all along (about 800 live tracks purchased from the artist's website), and I synced the library. It appeared to be going well, and the various concert albums began to show up on my phone.

But then I looked at my macbook screen and was seeing all the songs from my other library also apparently uploaded (the view had changed from my new secondary, live-album library to just everything), so I immediately turned off "sync library." Not only do I not need the risk to my main library, I also don't need the clutter. I really only want to make available the portion of my library that I want to make available.

Where it stands now: Most of the live library did not upload before I shut it down. I cannot see a way to specify that I only want one library uploaded, and I note that where I click the box to "sync library," it in fact says it will upload "all the music" and "all the music on this computer," versus just in my chosen library. Am I missing something?

Thanks very much,

cuID

Thanks very much, Mike. This stands as my backup option if I cannot find a way to avoid syncing my entire library. Working on turingtest2's suggestion below, but the music app seems to have jumped its tracks ...