You can't convert mp3 to wav in WMP. You will need other software to do that. To solve your problem surely all you need to do is to create an audio CD from the the mp3 files in question. I think ...

How to Convert Text to WAV. Waveform Audio, or WAV, files are sound files that are commonly used to play music on personal computers. WAV files are often larger in size and more flexible than ...

Free file format convertor software, Microsoft Store app, Free online file converter tool to convert MP4 to MP3, AVI, GIF, MOV WAV, WMV are covered here.

Navigate through the folders that appear in Windows Explorer and find a WAV file. Click the file to highlight it and move to the small Windows Media player that appears in the Preview pane.