Is there some software out there that allows real time control of loops? Maybe a plug-in or a standalone program? Basically giving the same functionality of a loop pedal like the Digitech Jamman or the Boss RC stuff. I want to try writing some stuff with a looper because it has so much possibilities but I'll love to try it out in software before splashing out on one of the pedals, and it might even be better on a program. I'm fairly sure I saw a video before where a guy was using a Mac and he was recording some parts and then playing them all on a piano. He plucked the strings in the body to get some weird sounds and he layered it all up in one performance.