What computer program changes voice pitch?

I want to know how to change the pitch of my favorite songs and I want to know what program I need to do that.What computer program changes voice pitch?
This is an easy one. You need Audacity. You can make a song sound really high or low while also doing many other things to make it sound cool/funny.



To get it go to http://download.cnet.com/Audacity/3000-2 and download it.



Now once you have downloaded it, just do what this video says and your good to go! http://www.youtube.com/watch?v=p5Lf0Gteg



Hope I helped and Good Luck!What computer program changes voice pitch?
autotune!

available here:

http://www.antarestech.com/
you can change pitch, speed or pitch without changing speed in audacity, a great free audio editor.