Thanks for refreshing my memory.
It's been awhile, so sorry I don't remember, but if you have the Panasonic Jukebox kit, could you download these audio files to an SD card and then check-in with Jukebox, then save back to another SD Card? Or is it, like I believe it is, exclusive to the original SD Card and Computer where the original conversion was made.
Panasonic, the maker of Jukebox knew how to lock down audio files so they could not be shared.
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Larry "Hawk"
♫ 🎹🎹 ♫ SX-900