Equal tempered tuning dissonant on oscilloscope:

https://www.youtube.com/watch?v=6NlI4No3s0M

Exploring the lattice, JI and ET:

https://www.youtube.com/watch?v=I49bj-X7fH0

https://www.youtube.com/watch?v=M5OJgsHXSmY

> the Tonnetz (German: tone-network) is a conceptual lattice diagram representing tonal space first described by Leonhard Euler in 1739.

https://en.wikipedia.org/wiki/Tonnetz