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.

If you are searching for best WAV to MP3 converters for PC, read this article. We have covered select online audio converters and desktop clients.

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.

If you've ever looked for software that can convert audio and video files on Windows, you might know how hard it can be to find dedicated solutions ...