Record application audio ouput on iOS

Question

I've read some information about recording audio you play on the application (with buttons), but haven't really understood the basics.

What do I need? Can I record audio being played in the application with Remote I/O Unit?

Are there any samples I could study?

Thanks

Answer 1

I want to give you a link to Apple's sample app as a comment. But SO does not allow me because I do not have 50 reputation. So here it is. Good luck.