Mp3 Stream convertion

Have a look at this codeproject article

http://www.codeproject.com/cs/media/Aumplib.asp[^]

Here's a youtube video[^] for the same

However, be aware that MP3 is a compressed file format, when audio has been converted to MP3 it's been 'squeezed' as part of the lossy compression

"When performing lossy audio encoding, such as creating an MP3 file, there is a trade-off between the amount of space used and the sound quality of the result. Typically, the creator is allowed to set a bit rate, which specifies how many kilobits the file may use per second of audio. The higher the bit rate, the larger the compressed file will be, and, generally, the closer it will sound to the original file"

Converting an MP3 into a WAV won't get you the audio back that was lost as part of the compression