Lumatone mapping for 42edo
There are many conceivable ways to map 42edo onto the onto the Lumatone keyboard. However, as both of its fifths are about as far away from just as possible, neither the sharp or the flat versions of the Standard Lumatone mapping for Pythagorean work particularly well. The flat fifth is the same as that of 7edo, which if used would result in six mutually-exclusive rings of fifths, so to cycle through all notes using the circle of fifths you need to use the sharp fifth instead, which gives ultrapyth.
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The Lemba mapping is also of particular interest despite using a non patent val.
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