When I browse an audio cd, there are many subdirectories, besides the real audio files, they are as follows (this view is only from konqueror, konsole or terminal don't show any thing):
media:/hdc
CDA/
FLAC/
Full CD/
Information/
MP3/
Ogg Vorbis/
...Audio files.wav

In every folder there are the audio files already, in FLAC there are the flac versions of the wav files in the the disk, and in the other directories as well, you can copy them or even listening directly, so my question is where those files came from? are they burned already in my audio disk?, the drive is a dvd-ram lg dvd-burner.

They are virtual files (eg they do not exist) that the audiocd i/o slave shows you and converts to on the fly when listening/copying to disk.

Thanks Man!!!!