You can use Audio Grabber or cdex software for converting audio cd or wav file to mp3 . For more details you can also contact me at funny_guy123@rediffmail.com
CDex is the best and simple software for converting to mp3.
You can also download the shareware version of Audiograbber software from their website.
And also for converting your mp3 files into wav or cda format there is no need of extra software as u can do this one directly from your cd burning software....
I am using the CDEx software from last two years and I myself justified that this is the best software for this purpose.
This software has also got the flexibility to reccord audios from audio casstette by inputting through the Line in pin.
With regards,
Haneef