100edo: Difference between revisions
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*[[Greeley8]] | *[[Greeley8]] | ||
*[[Greeley15]] | *[[Greeley15]] | ||
Since 100edo has a step of 12 cents, it also allows one to use its MOS scales as circulating temperaments. | |||
=100bddd and the 22-note scales= | {| class="wikitable" | ||
|+Circulating temperaments in 100edo | |||
! Tones | |||
!Pattern | |||
! L:s | |||
|- | |||
|5 | |||
|[[5edo]] | |||
|equal | |||
|- | |||
| 6 | |||
|[[4L 2s]] | |||
|17:16 | |||
|- | |||
|7 | |||
|[[2L 5s]] | |||
|15:14 | |||
|- | |||
|8 | |||
|[[4L 4s]] | |||
|13:12 | |||
|- | |||
|9 | |||
|[[1L 8s]] | |||
|12:11 | |||
|- | |||
| 10 | |||
|[[10edo]] | |||
|equal | |||
|- | |||
|11 | |||
|[[1L 10s]] | |||
|10:9 | |||
|- | |||
|12 | |||
|[[4L 8s]] | |||
|9:8 | |||
|- | |||
|13 | |||
|[[9L 4s]] | |||
| rowspan="2" |8:7 | |||
|- | |||
|14 | |||
|[[2L 12s]] | |||
|- | |||
|15 | |||
|[[10L 5s]] | |||
| rowspan="2" |7:6 | |||
|- | |||
|16 | |||
| 4L 12s | |||
|- | |||
| 17 | |||
|[[15L 2s]] | |||
| rowspan="3" |6:5 | |||
|- | |||
|18 | |||
| 10L 8s | |||
|- | |||
|19 | |||
|[[5L 14s]] | |||
|- | |||
|20 | |||
|[[20edo]] | |||
|equal | |||
|- | |||
|21 | |||
|16L 5s | |||
| rowspan="4" |5:4 | |||
|- | |||
| 22 | |||
|12L 10s | |||
|- | |||
|23 | |||
|8L 15s | |||
|- | |||
|24 | |||
|4L 20s | |||
|- | |||
|25 | |||
|[[25edo]] | |||
|equal | |||
|- | |||
|26 | |||
|22L 4s | |||
| rowspan="8" |4:3 | |||
|- | |||
|27 | |||
|19L 8s | |||
|- | |||
| 28 | |||
|16L 12s | |||
|- | |||
|29 | |||
|13L 16s | |||
|- | |||
|30 | |||
|10L 20s | |||
|- | |||
|31 | |||
|7L 24s | |||
|- | |||
| 32 | |||
|4L 28s | |||
|- | |||
|33 | |||
|1L 32s | |||
|- | |||
|34 | |||
|32L 2s | |||
| rowspan="16" | 3:2 | |||
|- | |||
|35 | |||
|30L 5s | |||
|- | |||
|36 | |||
|28L 8s | |||
|- | |||
|37 | |||
|26L 11s | |||
|- | |||
|38 | |||
| 24L 14s | |||
|- | |||
|39 | |||
| 22L 17s | |||
|- | |||
|40 | |||
| 20L 20s | |||
|- | |||
|41 | |||
|18L 23s | |||
|- | |||
|42 | |||
|16L 26s | |||
|- | |||
| 43 | |||
| 14L 29s | |||
|- | |||
| 44 | |||
|12L 32s | |||
|- | |||
| 45 | |||
|10L 35s | |||
|- | |||
|46 | |||
|8L 38s | |||
|- | |||
|47 | |||
|6L 41s | |||
|- | |||
|48 | |||
|4L 44s | |||
|- | |||
|49 | |||
|2L 47s | |||
|- | |||
|50 | |||
|[[50edo]] | |||
| equal | |||
|- | |||
| 51 | |||
|49L 2s | |||
| rowspan="29" |2:1 | |||
|- | |||
|52 | |||
|48L 4s | |||
|- | |||
|53 | |||
|47L 6s | |||
|- | |||
|54 | |||
|46L 8s | |||
|- | |||
| 55 | |||
| 45L 10s | |||
|- | |||
|56 | |||
|44L 12s | |||
|- | |||
| 57 | |||
| 43L 14s | |||
|- | |||
|58 | |||
|42L 16s | |||
|- | |||
|59 | |||
|41L 18s | |||
|- | |||
|60 | |||
|40L 20s | |||
|- | |||
|61 | |||
|39L 22s | |||
|- | |||
| 62 | |||
|38L 24s | |||
|- | |||
|63 | |||
|37L 26s | |||
|- | |||
|64 | |||
|36L 28s | |||
|- | |||
| 65 | |||
|35L 30s | |||
|- | |||
| 66 | |||
|34L 32s | |||
|- | |||
|67 | |||
|33L 34s | |||
|- | |||
|68 | |||
|32L 36s | |||
|- | |||
|69 | |||
|31L 38s | |||
|- | |||
|70 | |||
|30L 40s | |||
|- | |||
|71 | |||
|29L 42s | |||
|- | |||
|72 | |||
|28L 44s | |||
|- | |||
|73 | |||
|27L 46s | |||
|- | |||
|74 | |||
|26L 48s | |||
|- | |||
|75 | |||
|25L 50s | |||
|- | |||
|76 | |||
| 24L 52s | |||
|- | |||
|77 | |||
| 23L 54s | |||
|- | |||
|78 | |||
|22L 56s | |||
|- | |||
|79 | |||
|21L 58s | |||
|} | |||
= 100bddd and the 22-note scales= | |||
The 100bddd val (which maps 3/2 onto 59\100, 5/4 onto its patent value of 32\100, and 7/4 onto 82\100) is of special interest as it provides a good alternative to [[22edo|22EDO]] for [[Diaschismic family|pajara]] temperament and for tuning Paul Erlich's decatonic scales, as well as diatonic scales (via superpyth temperament). This alternative tuning prioritizes the 3- and 5-limits over the 7-limit (although the latter is still within striking distance); its pure intervals are also all closer to their 12edo counterparts, and for both reasons it is much less xenharmonic overall. Melodically its properties are superior as well; decatonic scales are more expressive due to the larger difference between step sizes, and the superpyth diatonic scale has a minor second of 60¢ which just barely falls within the 60-80 cent range [http://www.anaphoria.com/Secor17puzzle.pdf favored by George Secor] for neomedieval compositions. | The 100bddd val (which maps 3/2 onto 59\100, 5/4 onto its patent value of 32\100, and 7/4 onto 82\100) is of special interest as it provides a good alternative to [[22edo|22EDO]] for [[Diaschismic family|pajara]] temperament and for tuning Paul Erlich's decatonic scales, as well as diatonic scales (via superpyth temperament). This alternative tuning prioritizes the 3- and 5-limits over the 7-limit (although the latter is still within striking distance); its pure intervals are also all closer to their 12edo counterparts, and for both reasons it is much less xenharmonic overall. Melodically its properties are superior as well; decatonic scales are more expressive due to the larger difference between step sizes, and the superpyth diatonic scale has a minor second of 60¢ which just barely falls within the 60-80 cent range [http://www.anaphoria.com/Secor17puzzle.pdf favored by George Secor] for neomedieval compositions. | ||
| Line 17: | Line 266: | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
| | Steps of 22-note MODMOS | | |Steps of 22-note MODMOS | ||
| | Interval name (decatonic) | | |Interval name (decatonic) | ||
| | Interval name (superpyth diatonic) | | |Interval name (superpyth diatonic) | ||
| | Pure interval size [multiplicity] | | |Pure interval size [multiplicity] | ||
| | Dog interval size [multiplicity] | | |Dog interval size [multiplicity] | ||
|- | |- | ||
| | 1 | | |1 | ||
| | Diminished 2nd<span style="vertical-align: sub;">10</span> | | |Diminished 2nd<span style="vertical-align: sub;">10</span> | ||
| | Minor second | | |Minor second | ||
| | 60¢ [12] | | |60¢ [12] | ||
| | 48¢ [10] | | |48¢ [10] | ||
|- | |- | ||
| | 2 | | | 2 | ||
| | Minor 2nd<span style="vertical-align: sub;">10</span> | | |Minor 2nd<span style="vertical-align: sub;">10</span> | ||
| | Augmented seventh | | |Augmented seventh | ||
| | 108¢ [20] | | |108¢ [20] | ||
| | 120¢ [2] | | |120¢ [2] | ||
|- | |- | ||
| | 3 | | |3 | ||
| | Major 2nd<span style="vertical-align: sub;">10</span> | | |Major 2nd<span style="vertical-align: sub;">10</span> | ||
| | Augmented unison | | |Augmented unison | ||
| | ''168¢ [14]'' | | |''168¢ [14]'' | ||
| | ''156<span style="line-height: 1.5;">¢ [8]</span>'' | | |''156<span style="line-height: 1.5;">¢ [8]</span>'' | ||
|- | |- | ||
| | 4 | | |4 | ||
| | Minor 3rd<span style="vertical-align: sub;">10</span> | | |Minor 3rd<span style="vertical-align: sub;">10</span> | ||
| | Major second | | |Major second | ||
| | 216¢ [18] | | | 216¢ [18] | ||
| | 228¢ [4] | | |228¢ [4] | ||
|- | |- | ||
| | 5 | | |5 | ||
| | Major 3rd<span style="vertical-align: sub;">10</span> | | |Major 3rd<span style="vertical-align: sub;">10</span> | ||
| | Minor third | | |Minor third | ||
| | 276¢ [16] | | |276¢ [16] | ||
| | 264¢ [6] | | |264¢ [6] | ||
|- | |- | ||
| | 6 | | |6 | ||
| | Minor 4th<span style="vertical-align: sub;">10</span> | | |Minor 4th<span style="vertical-align: sub;">10</span> | ||
| |Diminished fourth | | |Diminished fourth | ||
| | ''324¢ [16]'' | | |''324¢ [16]'' | ||
| | ''336¢ [6]'' | | |''336¢ [6]'' | ||
|- | |- | ||
| | 7 | | |7 | ||
| | Major 4th<span style="vertical-align: sub;">10</span> | | |Major 4th<span style="vertical-align: sub;">10</span> | ||
| | Augmented second | | |Augmented second | ||
| | 384¢ [18] | | |384¢ [18] | ||
| | 372¢ [4] | | |372¢ [4] | ||
|- | |- | ||
| | 8 | | |8 | ||
| | Augmented 4th<span style="vertical-align: sub;">10</span> | | |Augmented 4th<span style="vertical-align: sub;">10</span> | ||
<span style="vertical-align: sub;">Diminished </span>5th<span style="vertical-align: sub;">10</span> | <span style="vertical-align: sub;">Diminished </span>5th<span style="vertical-align: sub;">10</span> | ||
| | Major third | | |Major third | ||
| | 432¢ [14] | | |432¢ [14] | ||
| | 444¢ [8] | | |444¢ [8] | ||
|- | |- | ||
| | 9 | | |9 | ||
| | Perfect 5th<span style="vertical-align: sub;">10</span> | | |Perfect 5th<span style="vertical-align: sub;">10</span> | ||
| | Perfect fourth | | |Perfect fourth | ||
| | 492¢ [20] | | |492¢ [20] | ||
| | 480¢ [2] | | |480¢ [2] | ||
|- | |- | ||
| | 10 | | |10 | ||
| | Augmented 5th<span style="vertical-align: sub;">10</span> | | |Augmented 5th<span style="vertical-align: sub;">10</span> | ||
Diminished 6th<span style="vertical-align: sub;">10</span> | Diminished 6th<span style="vertical-align: sub;">10</span> | ||
| | Diminished fifth | | | Diminished fifth | ||
| | 540¢ [12] | | |540¢ [12] | ||
| | 552¢ [10] | | |552¢ [10] | ||
|- | |- | ||
| | 11 | | |11 | ||
| | Perfect 6th<span style="vertical-align: sub;">10</span> | | |Perfect 6th<span style="vertical-align: sub;">10</span> | ||
| | Augmented third | | |Augmented third | ||
Diminished sixth | Diminished sixth | ||
| | 600¢ [20] | | |600¢ [20] | ||
| | 588¢ [1] | | |588¢ [1] | ||
612¢ [1] | 612¢ [1] | ||
|- | |- | ||
| | 12 | | |12 | ||
| | Augmented 6th<span style="vertical-align: sub;">10</span> | | |Augmented 6th<span style="vertical-align: sub;">10</span> | ||
Diminished 7th<span style="vertical-align: sub;">10</span> | Diminished 7th<span style="vertical-align: sub;">10</span> | ||
| | Augmented fourth | | |Augmented fourth | ||
| | 660¢ [12] | | |660¢ [12] | ||
| | 648¢ [10] | | |648¢ [10] | ||
|- | |- | ||
| | 13 | | |13 | ||
| | Perfect 7th<span style="vertical-align: sub;">10</span> | | |Perfect 7th<span style="vertical-align: sub;">10</span> | ||
| | Perfect fifth | | |Perfect fifth | ||
| | 708¢ [20] | | |708¢ [20] | ||
| | 720¢ [2] | | |720¢ [2] | ||
|- | |- | ||
| | 14 | | |14 | ||
| | Augmented 7th<span style="vertical-align: sub;">10</span> | | |Augmented 7th<span style="vertical-align: sub;">10</span> | ||
Diminished 8th<span style="vertical-align: sub;">10</span> | Diminished 8th<span style="vertical-align: sub;">10</span> | ||
| | Minor sixth | | |Minor sixth | ||
| | 768¢ [14] | | |768¢ [14] | ||
| | 756¢ [8] | | |756¢ [8] | ||
|- | |- | ||
| | 15 | | |15 | ||
| | Minor 8th<span style="vertical-align: sub;">10</span> | | |Minor 8th<span style="vertical-align: sub;">10</span> | ||
| | Diminished seventh | | | Diminished seventh | ||
| | 816¢ [18] | | |816¢ [18] | ||
| | 828¢ [4] | | |828¢ [4] | ||
|- | |- | ||
| | 16 | | |16 | ||
| | Major 8th<span style="vertical-align: sub;">10</span> | | |Major 8th<span style="vertical-align: sub;">10</span> | ||
| | Augmented fifth | | |Augmented fifth | ||
| | ''876¢ [16]'' | | |''876¢ [16]'' | ||
| | ''864¢ [6]'' | | |''864¢ [6]'' | ||
|- | |- | ||
| | 17 | | | 17 | ||
| | Minor 9th<span style="vertical-align: sub;">10</span> | | |Minor 9th<span style="vertical-align: sub;">10</span> | ||
| | Major sixth | | |Major sixth | ||
| | 924¢ [16] | | |924¢ [16] | ||
| | 936¢ [6] | | |936¢ [6] | ||
|- | |- | ||
| | 18 | | |18 | ||
| | Major 9th<span style="vertical-align: sub;">10</span> | | |Major 9th<span style="vertical-align: sub;">10</span> | ||
| | Minor seventh | | |Minor seventh | ||
| | 984¢ [18] | | |984¢ [18] | ||
| | 972¢ [4] | | |972¢ [4] | ||
|- | |- | ||
| | 19 | | |19 | ||
| | Minor 10th<span style="vertical-align: sub;">10</span> | | | Minor 10th<span style="vertical-align: sub;">10</span> | ||
| | Diminished octave | | |Diminished octave | ||
| | ''1032¢ [14]'' | | |''1032¢ [14]'' | ||
| | ''1044¢ [8]'' | | |''1044¢ [8]'' | ||
|- | |- | ||
| | 20 | | |20 | ||
| | Major 10th<span style="vertical-align: sub;">10</span> | | | Major 10th<span style="vertical-align: sub;">10</span> | ||
| | Diminished second | | |Diminished second | ||
| | 1092¢ [20] | | |1092¢ [20] | ||
| | 1080¢ [2] | | |1080¢ [2] | ||
|- | |- | ||
| | 21 | | |21 | ||
| | Augmented 10th<span style="vertical-align: sub;">10</span> | | |Augmented 10th<span style="vertical-align: sub;">10</span> | ||
Diminished 11th<span style="vertical-align: sub;">10</span> | Diminished 11th<span style="vertical-align: sub;">10</span> | ||
| | Major seventh | | |Major seventh | ||
| | 1140¢ [12] | | |1140¢ [12] | ||
| | 1152¢ [10] | | |1152¢ [10] | ||
|- | |- | ||
| | 22 | | |22 | ||
| | 11th<span style="vertical-align: sub;">10</span> | | |11th<span style="vertical-align: sub;">10</span> | ||
| | Octave | | |Octave | ||
| | 1200¢ [22] | | |1200¢ [22] | ||
| | N/A | | |N/A | ||
|} | |} | ||
Alternatively, the unmodified, symmetrical 2MOS scale 5 4 5 4 5 4 5 4 5 4 5 5 4 5 4 5 4 5 4 5 4 5 could be used instead. This scale is very similar to the modified version except that it lacks dog tritones; every 6th<span style="vertical-align: sub;">10 </span>is exactly 600 cents. Because it repeats every half-octave, this scale could be used to construct straight-fretted guitars as long as they [ | Alternatively, the unmodified, symmetrical 2MOS scale 5 4 5 4 5 4 5 4 5 4 5 5 4 5 4 5 4 5 4 5 4 5 could be used instead. This scale is very similar to the modified version except that it lacks dog tritones; every 6th<span style="vertical-align: sub;">10 </span>is exactly 600 cents. Because it repeats every half-octave, this scale could be used to construct straight-fretted guitars as long as they [[wikipedia:Augmented-fourths_tuning|are tuned in tritones]]. This makes guitar construction much easier compared to other non-equally-tempered scales. The MODMOS would allow ''almost'' all the frets to be straight if the tritones tuning is used; only every eleventh fret would need to be curved. While the 2MOS is simpler, the MODMOS very closely approximates the [[Indian]] sruti system. | ||
Other, "gentle" alternatives to 22edo for pajara include [[78edo|78ddd]] and [[56edo|56d]]. The resulting 22-note scales have large and small steps in ratios of 4:3 or 3:2, respectively, and the rest of the spectrum of 22&[[34edo|34d]] temperaments is also usable. On the other hand, the “rough” alternatives to 22edo for pajara include [[58edo|58d]] and [[46edo|46d]]. The resulting 22-note scales have large and small steps in ratios of 4:1 or 3:1, respectively, and the rest of the spectrum of 12&[[34edo|34d]] temperaments up to 58d is also usable. | Other, "gentle" alternatives to 22edo for pajara include [[78edo|78ddd]] and [[56edo|56d]]. The resulting 22-note scales have large and small steps in ratios of 4:3 or 3:2, respectively, and the rest of the spectrum of 22&[[34edo|34d]] temperaments is also usable. On the other hand, the “rough” alternatives to 22edo for pajara include [[58edo|58d]] and [[46edo|46d]]. The resulting 22-note scales have large and small steps in ratios of 4:1 or 3:1, respectively, and the rest of the spectrum of 12&[[34edo|34d]] temperaments up to 58d is also usable. | ||