How to transfer music from iphone to itunes? - 2

I have some music that let's say was not purchased on itunes, But I want to add it from my iphone to my library because they are not in the library. How would I go about doing this, preferably without downloading a secondary application.

It's not possible if it isn't downloaded from iTunes. Apple does this on purpose to try to combat piracy. It's annoying, I know.