Lumatone mapping for 54edo
There are many conceivable ways to map 54edo onto the onto the Lumatone keyboard. However, it has 2 mutually-exclusive rings of fifths, so the Standard Lumatone mapping for Pythagorean is not one of them.
Diatonic
You can use the b val, but it is very flat, to the point where major seconds become 10/9 instead of 9/8.
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Diaschismic
Despite having a smaller range, the diaschismic mapping makes it much easier to play harmonics together.
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