if you view the contents of an audio CD from Windows, you'll see that it contains a number of .CDA files each corresponding to a song track. (CDA stands for Compact Disk Audio)
Here I'll show you where you can get a free audio converter, one of the easiest to use on the internet. Also, I'll show you the reason you should get an audio converter - a lot of you may not think you need one, but trust me, you do!