why does my music have a red circle with a square dot beside it?

Disable the sync music and make sure that you have the latest iOS update on the device by syncing again. Then reset the sync to include your music and see if that works. If not, I have no other answers. Good Luck

rkendrick's method helped me

This worked for me after NOTHING ELSE did (resets, re-installs, removing iTunes library, sync after sync).I have a little clean-up work with playlists to do due to the OTHER stuff I tried, but that's no problem compared to the frustration from before. Thanks for the simple answer that worked! (BTW, the settings I used after putting the music back in iTunes was -uncheck "only sync checked music" and -check "sync entire library" and then I pared down from there with subsequent syncs.

Thanks Mesinclair -this worked for me.

THANK YOU!!!! This worked perfectly--red dots are gone and all my music works. Wahoo!!!

Toadhall4---genius!! Thank you so so much!!!

This worked for me as well - a much simpler solution!

You're a genius Mesinclair! Thank you so much! 🙂

yep. this is is the solution. worked for both my ipad and my iphone

All attempts did not work for me, HOWEVER what did was, I clicked on "administrator", then clicked music, then sync all music, and it did. Simple as that.

This was by far the easiest fix. Thanks.🙂

Tried most all the suggestions posted..none worked... HOWEVER, I finally was able to get all my music back.

--->>>File, Home sharing .. turned it off, then back on ... sync'd device <---- and all my music was back...🙂

Thanks! a solution with no drama , minimally invasive- quick

THANK YOU, toadhall! Extremely simple solution that fixed my problem in seconds. No need for any copying, deleting, re-adding or syncing. Tracks were indiscriminately greyed out with red circles etc - sometimes just 1 or 2 tracks from a CD where everything else was OK. Very bizarre. iCloud strikes again?