how do you export songs in a playlist and convert them to WAV files?

To export songs just drag then from iTunes and drop into Windows Explorer. iTunes has no capability to convert to WAV files so you'd have to use a suitable third-party utility to do this. Not sure, though, why you'd want to do this - WAV is probably the least useful of all audio formats, and converting from MP3 or AAC to WAV won't magically increase audio quality.

Just to clarify, you can use iTunes to convert songs to WAV format. See this guide:

iTunes: How to convert a song to a different file format

My mistake 😊 ... so the answer to the original question is that you should:

• convert the files to WAV as described in the reference above
• drag and drop the converted files from iTunes to Windows Explorer
• delete the converted files from iTunes (assuming that you don't want to retain these in addition to the original format)