TalkingSoft.com Forums: about mp3 fixing - TalkingSoft.com Forums

Hi,
Anyone one know which software can fix mp3 by converting .mp3 to .mp3?
you know some people just change the file type by changing the file name, like delete .wav and type .mp3 at the end which will stuff the music file and can't open with common mp3 players.
so who know or herd any software can convert .mp3 to .mp3?
please tell me,
thanks in advance