I have been getting the error message "The Music File Is Not Well Formed" on my Windows 10 PC running Lightroom version 6.1 when I try to add .mp3 music to a slideshow. I have closed & restarted PC & Lightroom multiple times, tried afresh with a new test catalogue, but still cannot figure out what is wrong. Thanks!
Can you play the mp3 file with a media player?
I have the same problem. The mp3 files play with a media player.
Can you share a faulty file using Drobox or GoogleDrive or alike?