My favorite variant: https://novayashkola.org/janko/ https://novayashkola.org/janko/ , https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard https://en.wikipedia.or

My favorite variant: https://novayashkola.org/janko/ https://novayashkola.org/janko/ , https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard https://en.wikipedia.org/wiki/Jank%C3%B3_keyboard , https://en.wikipedia.org/wiki/Isomorphic_keyboard https://en.wikipedia.org/wiki/Isomorphic_keyboard Since a year ago, I found that I can play songs by ear on the Janko keyboard far more easily than on standard piano keyboards. More resources: https://github.com/wcgbg/terpstrakeyboard/ https://github.com/wcgbg/terpstrakeyboard/ , https://www.youtube.com/results?search_query=janko%20keyboard https://www.youtube.com/results?search_query=janko%20keyboar...