Could be. Where did you get them? Were they Archive.org or paid?

I'm surprised, though. I didn't think FLAC had DRM capability.

Are you trying to go to WAV or to MP3?

You could try to download something (like, oh I don't know, Grace Potter?) from Archive.org and see if your current method gives you different results with different files.

Audacity? Foobar?

I am interested in what happens next.

bibere usque ad hilaritatem