Greyed out songs when trying to add from iTunes to iPhone?
Solution 1:
Try playing the greyed out songs directly on your iPhone. If you cannot do that, do the following.
Ensure that the greyed out songs are indeed playable within your iTunes library (not within the iPhone section of your iTunes library)
Connect your iPhone to your iTunes, navigate to your iPhone section > music, select all greyed out songs and delete them.
Make sure that the "Sync music" and "Entire music library" options are ticked under the "Music" tab and sync your iphone once again with iTunes.
This should resolve the issue.
Solution 2:
I made a playlist, copied and pasted the songs from the old one, and deleted the old one. I re-synced the phone and it worked. It worked for all of them just by recreating one.
This solution fixed the grey circles next to 60% of my songs. I planned to make all new playlists but started with one as a test.
I chose a playlist where I had just purchased a new song today. Perhaps that caused a jam somewhere. Hope this helps someone.
Solution 3:
I solved this issue by selecting a song (or songs, one whole album), right-clicking, and selecting "Uncheck" selection. Then did the same to "Check" selection and it began syncing ("un-greying") all of the songs in my library that were stuck like that.