cda files on karaoke disk?

[Terri]

I loaded keyrite, everything was fine. It worked on a little .wav file I tried out. But, when I tried to alter a karaoke disk of mine, the songs on the disk show up as CD audio (.cda) rather than .cdg, even though the disk does say they are "CD+G" songs. I tried just typing the name in as xxxx.cda, but keyrite seemed to get bogged down and didn't do anything but flash the preview/stop button really fast.

Is there a way to access these files with keyrite so I can alter the pitch on them, or do I need something additional?