Eudora questions

I am so new at this...do you need to format the CDR media before you try to burn anything onto it?  And do you always have to convert the MP3 files to .wav to be able to listen to your new CD on a CD player?  I feel like an idiot here...but if I don't ask I will never know.

I'm starting a new post in the Software section for your CD-R questions and mp3 conversions...please see that one instead.