You spend months and months listening to the music, absorbing, practicing, working with real musicians who worked with them and getting as much of that as you can. And then the day you start shooting, you have to throw it all away. Because, they had no self-consciousness. They were natural performers and at that time, it wasn't about how you could synthesize a voice and make it appealing, it was about the natural little hiccups and the way you related a story or wrote the soul in the words you wrote. And 90% of your popularity was your performance and your interpretation of your own song. So, once we learned it all you just have to just kind of hope it all sunk in somewhere and just let it all go, cause they just had incredible confidence.

On making Walk the Line