http://itunes.apple.com/us/app/bjork-biophilia/id434122935
For a description of "harmonic coloring," see this page:
http://www.musanim.com/mam/pfifth.htm
The screenshot for Hollow is wrong in this video; click here for a fixed version:
http://www.youtube.com/watch?v=WeXJ4czixYk&t=0m44s