When animators were trying to illustrate the sounds of the new Pixar film Soul, they needed some non-traditional ideas, like … watch a jazz pianist play. “Along with video, they were able to digitally save the notes that were being played. That digital stream could be reverse-programmed into the animation in a way that worked almost like a player piano signaling to the animators which key was being played with each note. So when you see Joe at the piano, he’s playing exactly the notes you’re hearing.” – The New York Times