Any way to record sounds from the computer into a music file?

[jayeskreezy]

I used to use wire tap pro for this, but it seems now it only connects to my built-in mic for recording but I want to record a song from youtube (just the sound) and save it as a file. Anyway, if anyone lets me know pls tell me.

Thanks!

 

[MowingDevil]

I use this:

http://www.versiontracker.com/dyn/moreinfo/macosx/18611