iTunes to iPhone cannot sync parts of the iTunes music library I'm using iTunes on Windows and I have my Music Library. Recently I added some music (Mafia II soundtrack I purchased with the game) to the local iTunes Library, but the neither the Artist, nor the Album turn up in the Music Sync overview. Can someone tell me what might be the issue here?

Edit:
The Soundtrack in Question is the Mafia II Soundtrack acquired through the Digital Deluxe Steam Version. The Files are all in MP3 Format and to my knowledge properly tagged.

I primarily tried adding it by hand (dragging it into iTunes) and by adding them via the Add Folder/File to Library buttons. I disabled iTunes ability to manage the folders itself, as that is a behavior I do not want.

However, now, after removing and readding the tracks to the library several times, the Album itself ("2K Games - MAFIA II Official Orchestral Score") appears in the Album overview of the Music Sync menu (and there only). When looking for the ID3 Tag of the Genre ("Soundtrack") or the Contributing Artists ("2K Czech / FILMharmonic Orchestra Prague") and Album Artist ("2K Games"), nothing can be found. This changes my initial question to a small extent, but the problem, in a way, remains: It can't be found in 2 out of 3 overviews of my iTunes library.
How did you add the music to iTunes? Did you drag and drop it into the iTunes windows itself or did you manually add the music to the local folder?

If you manually added the music to the to the local folder then you need to "re-sync" your iTunes library so that the music appears in iTunes application.

Just choose "Add Folder to Library" and choose your iTunes music folder so that it "re-syncs" your library and ALSO adds all the new songs to your list as well.



You can add songs manually to your iTunes music folder without them appearing in iTunes if you navigate to the iTunes music folder itself on your computer and just drop the music in. iTunes tells you in the preferences:



But all of this is irrelevant until you tell us how you added the music to your computer???????

Hope this helps!