Ron, I ran across one of this type of cd recently. I don't remember the brand (Oldtimers disease
) and I can't find the post I put in the Beta area. You are correct that those are not the song files because they are too small. I don't think I was able to import them either. However, cdg files do list with a cda extension, so that isn't an indication of the problem, but the size is.
I'll look some more for that post and see if I can find out what brand it was.