i always wondered this myself :(
many games dont have audio tracks on there so you need to check the files somehow on the disk, is there a special tool?

To my understanding, you have to be able to reverse engineer the files on the disc to "rip" the .psf files from it. .a files are little easier, as you can usually copy these straight from disc [at least that's been my experience. then there's the obvious bit of ripping the CD tracks with your favorite mp3 [or other preferred format] ripper. It really depends on how the music was programmed in...