Duplicate songs on iPhone 12 Pro Max after syncing

So first dumb question. Did you go into iTunes, uncheck all the music, sync your phone and made sure the duplicates were gone but still had your library on the phone? If you did, the next thing I'd try is uncheck the music and create a backup. After you uncheck it and have a backup ready, eject the phone from iTunes and try deleting the music again from the music settings thing like the original solution. It might have the info of the music, but not the music itself so your phone won't have a fit and refuse to delete anything. It might just delete the info on the phone. After that, you can plug your phone back in and try resyncing your music to your phone and if that doesn't work, restore it from the backup.

In a forum, no. I searched for almost an hour to see if anybody was having the same problem and if there was a solution. I saw a lot of questions, but no actual solutions from anybody, let alone Apple. ****, most helpful answers I've ever seen on the forums is from some random person and the Apple person responding does absolutely diddly squat as far as offering an actual solution other than "factory reset your phone". Gee thanks, you useless so-and-so.

I'd give it a try again and see what happens after you uncheck all the music. When I did it, it got rid of the duplicates and all that was left was the little cloud icon next to each song. That's when I went in and deleted all the music from my phone so it was a completely clean slate. Then I synced my music again. It took 2 or 3 times before it all got put on there, so it might be a pain for you.

I didn't do it like that, sadly. I backed up my old phone and just restored from a backup and ended up with duplicates for some reason, even thought it was a brand new out of the box phone with nothing on it. Are your duplicates the 70% or is it all of them? I guess it doesn't really matter too much. 30% of 400GB is still a lot of music to go through and delete, especially if it happens every time you sync your phone. If you can, start completely fresh. Uncheck sync music, sync it 2 or 3 times just to be sure, then check the music app. If it has the little download cloud next to it, try deleting everything through the delete all music thing, then plug it back in and sync up your music again. Short of that, I'm running out of ideas. The nuclear option might be the way to go at some point if none of this works. I hope it doesn't come to that though.

Oddly enough, I ran into the same problem, but it wasn't until much later. Everything was dandy until I added a couple of new albums I had ripped into iTunes. After syncing, every album had the wrong artwork. Never did figure out why. I hadn't even noticed until a couple of days later. By then I needed to resync again for another album. After I synced it again, everything was back to normal. Nothing was messed up on iTunes, but my phone was like, "Nope." Hopefully after syncing again it'll go back to normal. If not, maybe just try adding some random CD into iTunes and syncing it onto your phone. Syncing is a pain in the butt, but if all else fails, you could try turingtest2's solution and hope for the best. I love my iPhone, but iTunes makes me want to throw my computer out the window sometimes.

Odd. Try resyncing again and see if that does it. And do it twice. For some reason, if I sync it, it won't sync music, but the second time I sync it without unplugging the phone or anything, just hit "Sync" right after its done, it adds the music. Its weird. If it doesn't, clear your music again and sync a couple of times. I had that happen to me too, where the album covers were all screwed up. I resynced it and they went back to where they were supposed to be. The only one song thing, that's a new one for me. Maybe double check in iTunes to see if there's something that got checked. I've run into a problem where albums got split into multiple "albums" because some were marked as a compilation, others weren't. And if there's a space in the song info of one song and not the others, it'll split it when that happens too. I'm kind of taking a shot in the dark, so hopefully something works. If not, let me know and drop some more info. Is it just the one album with one song or multiples of the same album with single songs? Are you in the artist view, album view or does it happen in both? Maybe iTunes just confused itself when it shuffled the album covers and it'll fix itself once it gets its head out of its butt.