download the best mp3 audio enhancer :)

[NIcaBoy]

In no particular order:

iZotope OzoneMP (14 day trial)
http://izotope.com/products/audio/media/demo.html

FXsound DFX Audio Enhancer (limited function indefinite demo)
http://www.fxsound.com/

SRS Audio Sandbox (unknown demo time length)
http://www.srs-store.com/store-plugi...sas-plugin.asp

Amphiotik Enhancer (unknown demo time length)
http://www.holistiks.com/amphiotik/m...oducts_amen_st

ANWIDA Soft V-Hyper HYPER VITALIZER (limited function demo)
http://www.anwida.com/product.asp?pid=27&area=2

4Front Technologies OSS3D (30 day trial)
http://www.oss3d.com/usite/

Others...

[unidentified]

Audacity is good, and totally free

[Viceman]

DFX 8 Audio Enhancement is the best audio enhancement I ever used, I have the demo version and it makes the mp3 sound better, specially if you have low bitrate mp3

You can download the demo version from here
http://www.fxsound.com/dfx/index.php...plus=0&refer=0
The full version cost money