Good stuff...
"The original Tonnetz grid was created by arguably the greatest mathematician who ever lived, Leonhard Euler. He turned his mathematical mind to graphing music and first noted that a Major chord is a Major 3rd with a minor 3rd stacked on top, while a minor chord is a minor 3rd with a Major 3rd stacked on top.
From there he branched out the relationships of those starting notes and built the grid mathematically." -Luke Dub (YouTube Viewer).
