Euler's Tonnetz note layout and the EC.

[Duncan Luddite]

This was recommended to me by our son, saying that it looked like the layout of the keys on my EC. And yes it is, with a minor readjustment for the #'s and b's, but they are still in line with their natural key, just put directly sideways across so they share the spot with the next key in the triangular grid. Eg. G, G#/Ab, A.
 I'm guessing that Sir Charles Wheatstone, being a physicist etc, was familiar with Euler's work.
Anyway, an interesting 1m 20sec introduction to the Tonnetz layout. I'll go and check out more about it.

Cheers.

 

https://youtu.be/I5Bj9GyAfRc?si=xW_athZqv8gVTv8y

[David Barnert]

It also has a lot in common with the Hayden layout and the chromatic button accordion.