http://www.mp3-box.org/mp3-quality-loss/
Is there a way to compress mp3 audio files on your computer?
Is there like a free program to compress audio files that I can use? I don’t want the quality of the files to become bad, I just want them to become smaller with no loss in audio quality. Is this possible?
Convert it to WMA.
In wiki it stated:
“Microsoft claims that WMA Standard sounded better than MP3 at the same bit rate; Microsoft also claims that WMA Standard at lower bit rates sounded better than MP3 at higher bit rates.”
My second link converts MP3 to WMA. It will become smaller without losing audio quality.
Windows Tip: Compress MP3′s without loss of quality