It's gone from the library and Finder. I first saw it with the album, (Pronounced 'Lĕh-'nérd 'Skin-'nérd) by Lynyrd Skynyrd. As you can see, it's chock full of special characters. When I was running some files through Audition to clean up leading and trailing silence, I double clicked "Tuesday's Gone" and it played for two seconds and stopped, then the track time changed to 0:02. So, I right clicked and chose "Show In Finder." The folder opened , the track was gone. With the Finder window open, I went through the rest of the album. One by one, as I double clicked the tracks, they disappeared from the folder. And the weird part is, they DIDN'T end up in the trash. They were just gone. The next album was "A" by Agnetha Faltskög (From ABBA). One by one as I double clicked, the tracks disappeared from the folder.
As I stated in the original post, I have a backup SSD, so it wasn't a big deal from one standpoint, but there's something going on with Music since I installed Ventura. I have around 64,000 songs and this never happened until the upgrade.
I don't even use music as a player. It's more like a search tool to find things to edit, before adding them to my MP3 player. But if it's going to wipe out what I'm searching for, it's of no use to me.
I've been an iTunes user since the first build for OS9, so feel free to suggest anything you think might help. I'm not so sure this is a Music thing, though. The app works fine except for the special character glitch, but that didn't start until Ventura, so I'm leaning toward something with the New OS causing it. I remember a photo disappearing the same way right after the install.
One other thing. When I first tried copying replacement files onto the Music drive, I got an "Error-50" message. It persisted until I erased the drive and just copied the entire contents from the backup.