WAVs and MP3s are two of the most popular audio formats amongst PC and Mac users. While WAVs are of higher quality and larger file size than MP3s, you may want to convert your WAVs to MP3s for uploading to a cell phone or portable media device. Unfortunately, Windows Media Player does not allow you to convert to different formats within the software itself, so you will need to burn a CD with your WAV files and then import them back into WMP as MP3s. Please note that converting to MP3 will result in some loss of audio quality.
Launch WMP and navigate to the main "Library" screen. Choose "Burn List" from the "List" panel to begin editing your burn list.
Drag and drop your WAV files from your library directly into the "Burn List" panel.
Insert a blank CD into your computer and click "Start Burn." Wait for WMP to finish burning the CD.
Select "Options" from the "Tools" menu and click on the "Rip" tab. Select "MP3" from the drop-down menu of rip setting formats and click "OK."
Click the "Rip" tab and import your newly created CD back into WMP. The files will automatically convert to MP3 when they are copied into the WMP library.