There are many conceivable ways to map 70edo onto the onto the Lumatone keyboard. Only one, however, agrees with the Standard Lumatone mapping for Pythagorean.
Diatonic
However, due to its size, this mapping does not cover all the notes. In addition, the best approximation to 5/4 is a quadruply augmented or pentuply diminished 7th, which is impossible to play with the root note of the chord. In most cases it will make more sense to use the c val, where it is a diminished 4th. Despite the missing notes, Bryan Deister has demonstrated this mapping in Drift Away - Steven Universe (microtonal cover in 70edo) (2025).
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Pseudo-Isomorphic
Pseudo-Diatonic
Bryan Deister has demonstrated a pseudo-isomorphic mapping for 70edo in Improv in 70edo (2025) that uses one duplicated note in each octave to achieve a pseudo-diatonic layout for ease of access to common consonant intervals, although it does not include all the notes of the tuning system. Each note 70 is actually another note 0, so as to reset octave pitch down by ~81/80 (moderately deflated).
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70
Pseudo-Antidiatonic
Bryan Deister has demonstrated a pseudo-isomorphic mapping for 70edo in 70edo prelude (2025) that uses three duplicated notes in each octave to achieve a pseudo-antidiatonic layout. Notes 70, 71, and 72 are duplicates of 0, 1, and 2, respectively; of these, the ones appearing on the layout are 0 and 70, 1, and 72. Playing as on a true antidiatonic layout results in a 1L1 1L2 5s MODMOS having a step ratio of 21:14:9.
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Diaschismic
The 2L 8s mapping covers the whole gamut and makes harmonics easier to play together, although some of the higher ones are less efficiently mapped than in 58edo.
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The 6L 4s mapping is meant to get as many notes as possible onto the space available on existing Lumatones, rather than attempting to fit any particular temperament, although it is a type of mapping supported by Diaschismic. This mapping gets three full octaves and the better part of another octave, with no missed notes and a moderate slope (comparable to the mapping above, but in the opposite direction). Bryan Deister has demonstrated this mapping in microtonal improvisation in 70edo (2025).
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Antidiatonic
The 7L 2s mapping generated by 31/70 covers all the notes with even fewer repeats, but does not put the harmonics as close to each other.
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