Lumatone mapping for 58edo: Difference between revisions

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There are many conceivable ways to map [[58edo]] onto the [[Lumatone]] keyboard. Unfortunately, as it has multiple rings of 5ths, the [[Standard Lumatone mapping for Pythagorean]] is not one of them, and due to it's size, would not cover the whole gamut even if it was. Instead, the [[2L 8s]] [[diaschismic]] mapping is probably the most intuitive way of providing access to all intervals while putting well-tuned ones close together if you're used to playing 12edo.
{{Lumatone mapping intro}} Due to its size, it would not cover the whole gamut even if it was.  
{{Lumatone EDO mapping|n=58|start=19|xstep=5|ystep=4}}
 
== Diaschismic (+ Charismic + Semitonismic) ==
The [[2L 6s]] (14:5 step ratio) and [[2L 8s]] (9:5 step ratio) [[Diaschismic]] mappings are probably the most intuitive ways of covering the whole gamut while putting well-tuned ones close together if you're used to playing 12edo. The rightward generator 5\58 functions as the classic diatonic semitone ~[[16/15]], the large septendecimal semitone ~[[17/16]], and the small septendecimal semitone ~[[18/17]], meaning that the charisma [[256/255]] and the semitonisma [[289/288]] are both tempered out. The rightward generator is also the [[normal forms|minimal form]] of the Diaschismic generator, and indeed the [[diaschisma]] 2048/2045 is also tempered out. This generator makes a slew of intervals of reasonable prime limit that are not far from just: two of them make a near-just whole tone ~[[9/8]]; three of them make a mildly flat classic minor third ~[[6/5]]; four of them make a mildly flat undecimal major third ~[[14/11]]; five of them make a near-just classic acute fourth ~[[27/20]]; six of them pass the [[semioctave]] to make a slightly flat greater septimal tritone ~[[10/7]]; seven of them make a slightly flat septimal superfifth ~[[32/21]]; eight of them make a slightly flat tridecimal supraminor sixth ~[[21/13]]; nine of them make a near-just septimal major sixth ~[[12/7]]; and ten of them make an extremely accurate undecimal supraminor seventh ~[[20/11]]. Other common intervals such as the moderately sharp (although high in relative error) classic major third ~[[5/4]], the near-just perfect fourth ~[[4/3]], and the near-just perfect fifth ~[[3/2]] are in very easy reach of the chain of rightward generators, and not very distant from the root note. This may be sufficient compensation for the reverse chroma and the range of only three full octaves (which slope only slightly upward), with large partial octaves being chopped off by the upper left and lower right corners, which may be compositionally limiting.


However, this results in a range barely over 3 octaves, which may be compositionally limiting.
=== 2L 6s (14:5 step ratio) ===
[[Bryan Deister]] has demonstrated the 2L 6s mapping in [https://www.youtube.com/shorts/7gkRyld5OU8 ''Waltz in 58edo''] (2025).
{{Lumatone EDO mapping|n=58|start=27|xstep=5|ystep=9}}


=== 2L 8s (9:5 step ratio) ===
This mapping has close to the same full octave range as the 2L 6s mapping, but spreads the range out over more of the Lumatone keyboard to get more repeated notes (and smaller partial octave regions chopped off by the upper left and lower right corners), and the cost of putting common intervals one rightward position further away from the root note.
{{Lumatone EDO mapping|n=58|start=19|xstep=5|ystep=4}}


The [[6L 2s]] [[Echidna]] mapping has fewer repeated notes while still providing the full gamut, giving you a range almost as large as the standard mapping. (This mapping, like many others, is [https://www.facebook.com/groups/lumatone.keyboard/permalink/5624482024327650 available from the Lumatone Facebook group].)
== Echidna ==
The [[6L 2s]] [[Echidna]] mapping has fewer repeated notes while still providing the full gamut, giving you a range almost as large as the standard mapping. (This mapping, like many others, is [https://www.facebook.com/groups/lumatone.keyboard/permalink/5624482024327650 available from the Lumatone Facebook group].) [[Bryan Deister]] demonstrates this mapping in [https://www.youtube.com/shorts/4J4MNno-4PA ''58edo improv''] (2025).
{{Lumatone EDO mapping|n=58|start=54|xstep=8|ystep=-3}}
{{Lumatone EDO mapping|n=58|start=54|xstep=8|ystep=-3}}


Other good options include [[7L 3s]] [[Hemififths]]
== Hemififths ==
Other good options include the [[7L 3s]] [[Hemififths]]
{{Lumatone EDO mapping|n=58|start=2|xstep=7|ystep=-4}}
{{Lumatone EDO mapping|n=58|start=2|xstep=7|ystep=-4}}


[[5L 3s]] [[Buzzard]], although this occasionally skips a step.
== Buzzard ==
The [[5L 3s]] [[Buzzard]] mapping is also another good option, although this occasionally skips a step.
{{Lumatone EDO mapping|n=58|start=9|xstep=11|ystep=-10}}
{{Lumatone EDO mapping|n=58|start=9|xstep=11|ystep=-10}}


Or if you don't mind the smaller range and want to more easily exploit narrow intervals, [[2L 12s]] [[Harry]] (as in [[Lumatone mapping for harry]])
== Harry ==
Or if you don't mind the smaller range and want to more easily exploit narrow intervals, there is the [[2L 12s]] [[Harry]] mapping (as in [[Lumatone mapping for harry]])
{{Lumatone EDO mapping|n=58|start=40|xstep=4|ystep=1}}
{{Lumatone EDO mapping|n=58|start=40|xstep=4|ystep=1}}


{{Navbox Lumatone}}
{{Navbox Lumatone}}

Latest revision as of 08:41, 21 August 2025

There are many conceivable ways to map 58edo 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. Due to its size, it would not cover the whole gamut even if it was.

Diaschismic (+ Charismic + Semitonismic)

The 2L 6s (14:5 step ratio) and 2L 8s (9:5 step ratio) Diaschismic mappings are probably the most intuitive ways of covering the whole gamut while putting well-tuned ones close together if you're used to playing 12edo. The rightward generator 5\58 functions as the classic diatonic semitone ~16/15, the large septendecimal semitone ~17/16, and the small septendecimal semitone ~18/17, meaning that the charisma 256/255 and the semitonisma 289/288 are both tempered out. The rightward generator is also the minimal form of the Diaschismic generator, and indeed the diaschisma 2048/2045 is also tempered out. This generator makes a slew of intervals of reasonable prime limit that are not far from just: two of them make a near-just whole tone ~9/8; three of them make a mildly flat classic minor third ~6/5; four of them make a mildly flat undecimal major third ~14/11; five of them make a near-just classic acute fourth ~27/20; six of them pass the semioctave to make a slightly flat greater septimal tritone ~10/7; seven of them make a slightly flat septimal superfifth ~32/21; eight of them make a slightly flat tridecimal supraminor sixth ~21/13; nine of them make a near-just septimal major sixth ~12/7; and ten of them make an extremely accurate undecimal supraminor seventh ~20/11. Other common intervals such as the moderately sharp (although high in relative error) classic major third ~5/4, the near-just perfect fourth ~4/3, and the near-just perfect fifth ~3/2 are in very easy reach of the chain of rightward generators, and not very distant from the root note. This may be sufficient compensation for the reverse chroma and the range of only three full octaves (which slope only slightly upward), with large partial octaves being chopped off by the upper left and lower right corners, which may be compositionally limiting.

2L 6s (14:5 step ratio)

Bryan Deister has demonstrated the 2L 6s mapping in Waltz in 58edo (2025).

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2L 8s (9:5 step ratio)

This mapping has close to the same full octave range as the 2L 6s mapping, but spreads the range out over more of the Lumatone keyboard to get more repeated notes (and smaller partial octave regions chopped off by the upper left and lower right corners), and the cost of putting common intervals one rightward position further away from the root note.

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Echidna

The 6L 2s Echidna mapping has fewer repeated notes while still providing the full gamut, giving you a range almost as large as the standard mapping. (This mapping, like many others, is available from the Lumatone Facebook group.) Bryan Deister demonstrates this mapping in 58edo improv (2025).

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Hemififths

Other good options include the 7L 3s Hemififths

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Buzzard

The 5L 3s Buzzard mapping is also another good option, although this occasionally skips a step.

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Harry

Or if you don't mind the smaller range and want to more easily exploit narrow intervals, there is the 2L 12s Harry mapping (as in Lumatone mapping for harry)

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