question about cd text

[jd1008]

I have some mp3 files which seem to have built-in cd-text info about the 
track and the album.
When I transcode them to wav and I play the wav file using ffplay or 
mplayer, the cd-text
info is also displayed, just like playing the mp3 file.
So, if I create an iso of the directory containing the wav files,
I mount the iso file via the loop device, and play the files listed
in the mount point, the cd-text is no longer there.
How do I force the preservation of cd-text when creating the iso?