How do you convert windows media player file into MP3?

Just recently I downloaded the latest windows media player. number 10 I believe. now this is not the easiest way but it certainly has worked for me. just make an audio CD with the windows media audio files. not a data CD. they will change from .WMA to .CDA so they can play in a normal audio CD player. with Windows Media Player 10 ripping tracks off a CD you have the option to save them as MP3 rather than WMA.