User:Lucius Chiaraviglio/Keyboard Layout Lab/Various other Lumatone mappings: Difference between revisions

== Harry + Marvolo Lumatone mappings ==

=== 72edo (demonstrated to work but awaiting approval) ===

[[Bryan Deister]] has demonstrated a mapping of [[72edo]] as nine rings of [[8edo]] going right, offset so as to also produce the scale [[11L 9s (4/1-equivalent)]], in [https://www.youtube.com/shorts/VwVp3RVao_k ''microtonal improvisation in 72edo''] (2025). Although this mapping was intended to get as many notes as possible of 72edo into 280 keys (yielding a range of over 3⅔ octaves, although with an upward slope) rather than to support a specific temperament, the down-right generator (5\72) matches [[Harry]] and [[Marvel_temperaments#Marvolo|Marvolo]].

{{Lumatone EDO mapping|n=72|start=68|xstep=9|ystep=-4}}

Last modified:  [[User:Lucius Chiaraviglio|Lucius Chiaraviglio]] ([[User talk:Lucius Chiaraviglio|talk]]) 21:39, 28 May 2025 (UTC)

=== 94edo (demonstrated to work but awaiting approval) ===

[[Bryan Deister]] has demonstrated the [[11L 2s]] mapping of [[94edo]] in [https://www.youtube.com/shorts/Zx4xbJhXmgc ''microtonal improvisation in 94edo''] (2025). In the application of this temperament to this mapping, the rightward step corresponds to a stack of two quite accurate ~[[16/11]] generators (51\94, and the [[octave complement]] is ~[[11/8]], at 43\94) after octave-reduction, making this a mapping closely related to the Diatonicized Chromaticism used extensively by [[Ivan Wyschnegradsky]] in his [[24edo]] compositions. The rightward step can also be made by going down by the octave-complemented generator (39\94, ~11/8) and [[semioctave]]-reducing. This makes it a mapping for 11-limit (or higher) [[Schismatic_family#Kleischismic|Kleischismic]] (substituting the normal generator ~[[35/24]] with the simpler ~11/8, which 94edo represents more accurately), although this yields an extremely soft [[10L 2s]] scale (step ratio 8:7, currently off the right edge of the scale tree) instead of 11L 2s. Similarly, if one uses the highly accurate ~[[4/3]] (39\94, octave complement ~[[3/2]] as 55\94) and stacks two of these, the result is a rightward double step, making this mapping also work for [[Garibaldi]] and its 11-limit (or higher) extension [[Schismatic_family#Cassandra|Cassandra]] (although with some vertical wraparound challenges as noted following). The range is a bit under three octaves, and the octaves slope up, so note 0 is set to a point on the left edge 3/4 of the way down (to get note 0 two octaves higher to be 3/4 of the way up); this results in a skipped note 1 in the lowest note 0 to note 0 octave, but if one is willing to assign one key to a non-isomorphic position, the note 92 in the lower left corner (from the octave below the lowest note 0) could be reassigned to the missing note 1. A diatonic scale, or better yet a Ptolemy's intense diatonic (Zarlino) scale appears possible to do using both hands, although the octave slope causes the wraparound point to change with octave.

{{Lumatone EDO mapping|n=94|start=6|xstep=8|ystep=-5}}

Last modified:  [[User:Lucius Chiaraviglio|Lucius Chiaraviglio]] ([[User talk:Lucius Chiaraviglio|talk]]) 23:01, 28 May 2025 (UTC)