okay you could try using total video convertor.
http://www.veffect.com/total-video-converter/tvc.exe
it is only a trial but it will work! i know they are not videos but you can choose those and open in the convertor and if it says on the right cannot oen you are screwed, but if it gives the song info, when it asks to convert to what format press mp3 then it will say mp3 or mp2 do mp3 and it will make it as good as new.