itunes mp4 to mp3 converter free

M4P-MP3 or WMA?
I downloaded something from iTunes, and was in m4p (not mp4). The problem was that I have an iPod, so you can not read M4P. I downloaded several free converters, but the only free no time limit only works for M4A files. Is there any way I can have iTunes download m4a format or mp3?
Burn the song on an audio CD using iTunes (to put it on a list and clicking Burn CD). Then re-import the song in iTunes and this will have no copy protection. Sounds strange, but believe me it works.
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