Will mp3 play on any cd player? I burnt 50 copies for a woman and she said they were all blank. I burnt them in wav file because I was under the impression that would play on any player. Before I do the re burn for her I would like clarification.
Thank you in advance for any assistance!

I don't think it will work, what you can always do is convert your file into music cd format using MS Mediaplayer but you will get a lot more then 50 cd's.
Go to file--> copy--> copy to audio CD

Some HiFi DVD player can read mp3 on DVD but not all of them.