There are many conceivable ways to map 88edo onto the onto the Lumatone keyboard. Only one, however, agrees with the Standard Lumatone mapping for Pythagorean. The b val is only slightly worse tuned, but produces 4 unconnected rings of 22edo notes.
However, due to the size of the edo, this does not cover the whole gamut, although for a meantone mapping, this is not necessarily a show-stopper. Despite the missing notes, Bryan Deister uses this mapping in March in 88edo (2026).
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Expanded Diatonic
If you do want to cover all the notes with no skips and minimal repetition, you can expand it to the 7L 5s mapping, but this gives octaves a moderate downward slant. This is the highest edo in which this mapping gives access to all the notes, higher ones will need to use the even more expanded 12L 5s or 12L 7s MOSes. Brian Deister uses this mapping in microtonal improvisation in 88edo.
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Keeping the same generator but setting the period to the quarter octave gives you a near equal 4L 8s scale that keeps octaves closer to horizontal and makes chords easy to play
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Mothra
The Mothra mapping is also a good option, as 88edo is its higher limit optimal patent val. However, it has similar problems to the meantone mapping in that you have to choose between not having access to all the notes or heavily slanted octaves.
1L 4s
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Other Mappings
To maximise your range without skipping notes and keep octaves close to horizontal involves an inverted 9L 2s (step ratio 10:-1) scale which is not particularly intuitive to play.
