Terpstra keyboard

Thanks to Bogdan Constantinescu for the following videos.

 A Brief History of the Terpstra Generalized Keyboard

  The Terpstra Keyboard Concept

My take: this keyboard is very cool indeed - it's intended to start out as a keyboard that can be played by someone used to the "Standard Keyboard" layout, by playing with the notes as a slight angle - who would have thunk it?
Then, as one gets used to the new positions of the keys and the extra options available, transition easily to the faster and more compact Janko.

Then, it you really get funky you can remap to Sonome or jammer or go microtonal.

See the latter half of the "concept" video above.