Hi Joe,
Thanks for the detailed analysis.
Let me give you a few more details.
The songs skip when I play them from the song list, or from a playlist. But for some songs, if I go to the album list and play them from there, they're fine.
The songs in question always skip to the next song, but some songs can be fast forwarded towards the end, and played, so there is a gap.
All the songs in question were downloaded from CDs which have long been donated to a public library in a land far, far away, so there is no possibility of redownloading them 😐. I recently discovered songs from my iTunes store "Purchased" list that have been "sound clouded" so I clicked the magic cloud. A few of them can be played, but most exist somewhere in the clouds 😕.
I think you are correct about there being gaps, or the files are damaged, but this is a recent development, me thinks.
Conclusion, I have thousands of songs that I never listen to, so I'll just live without the ones in question. Downsize and simplify is the way to go for me, "All of humanity's problems stem from man's inability to sit quietly in a room alone." Blaise Pascal
Thanks again...