This layout is my solution to what a 17 equal division of the octave piano should be. In short I doubled every black key (though I made an error I need to correct – can you spot it?). It makes play in 17 equal pretty natural (a fifth is indeed a fifth, a seventh is indeed a seventh etc.) though I will need to learn how to use the accidentals better. I cannibalized a cheap used M-Audio 61es and used its black keys to modify a 88 es. So far I’m liking the result and it was really easy to do once I got the knock of popping off and on keys and the springs. download 17 edo piano debut