Audacity : Free audio editor and recorder

Audacity is very usefull software to edit and record sound(music)
There are so much thing that we can do with this software

example we can use to make instrumental from some music
(not always have very clean sound good or bad the instrumental depend from the original music)

we can use fade in (opening sound from little sound to original volume)and fade out(ending sound from original volume to little volume)

Change tempo of the sound

etcetera

Windows:
Click here to download

Mac OS X
Click here to download Intel

Click here to dowload PPC

Click here to download Mac OS 9



Enjoy