[Adam13531]

I'm not totally sure I understand your question. My original design document (from apparently a year ago!) is here: https://goo.gl/U1HnMu ← that was part of what I produced in the "six hours" that I mention in the video. Perhaps that will help, but I don't expect you to read through 11 pages to find your answer, so with clarification, I'd be happy to answer you!

[kian]

Sorry i phrased that poorly - what was the mapping of piano chords to characters you settled on?

[kian]

I went through and read your design document - thanks for the link! That answered my question. For anyone else wondering, one piano key per character within a given modifier palette (like letter, number, etc). With 24 major and minor chords, 4 times that in minor and major sevenths, another 12 dominant chords, 12 augmented, and 12*11 interval pairs, there is a very large space to map interface structures to. The trick is making it harmonically pleasing - however, with a graph of harmonic transitions and cadences, it ought to be possible to find isomorphisms that preserve pleasing sound if you matched unikely letter combinations to unpleasing sounds. Perhaps in the same way that i9en used to infer what you had typed based on probability and scrolling, perhaps we could do something similar with arpeggios or chords played within a certain span.

[Adam13531]

Ah, good, I'm glad you found the answer!

As for making something like this harmonically pleasing, it's been touched on here in other threads, but I think the whole project would require a redesign. If you were still aiming for a one-to-one mapping of piano keys to letters, then I think you would end up sacrificing both learning speed and typing speed.