This is just the intro to the song I'm trying to learn, but the process is cool so I'm writing it down.

I play the song from my iPhone, and try to play it on the piano.

Once I got the notes correct, I hook up my Mac book to the piano.

As I start playing, notes starts to show up in Garage band:

It records in MIDI with paddle timing and even how hard I hit the keys (emotion). The following is being play back from GarageBand, but it's almost like me playing. Very cool.