User:Inthar/4L 3s: Difference between revisions

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===Modal harmony===
===Modal harmony===
MODMOSes and chroma modification become more important...
MODMOSes and chroma modification become more important...
Treat it as neutralized mavila?

Revision as of 04:43, 29 April 2021

11edo smitonic

The intervals of the symmetric LsLsLsL mode (harmonics in bold):

Degree (1 = tonic) Cents Note name on C (22edo notation) Approximate ratios #Gens up
1 0 C 1/1 0
2 218.18 D 8/7, 9/8, 17/15 -3
3 327.27 Eb^ 6/5, 11/9, 17/14 +1
4 545.45 F^ 11/8, 15/11 -2
5 654.54 Gv 16/11, 22/15 +2
6 872.72 Av 5/3, 18/11, 28/17 -1
7 981.81 Bb 7/4, 16/9, 30/17 +3

Assuming the symmetric 2121212 mode, the 1-4-7 chord is:

  • 8:11:14 on degrees 1 and 6
  • 8:11:15 on degrees 3, 5, and 7
  • 44:56:77 (approx. 25:32:44) on degrees 2 and 4

Modal harmony

The seven modes are, from brightest to darkest:

Nerevarine mode 2212121
Vivecan mode 2122121
Lorkhanic mode 2121221
Sothic mode 2121212
Kagrenacan mode 1221212
Almalexian mode 1212212
Dagothic mode 1212122

Modally, the highest to lowest entropy scale degrees (unison = 1) are:

  • 2 and 7 (equally): .99 bits
  • 4 and 5 (equally): .86 bits
  • 3 and 6 (equally): .59 bits

If a scale degree is high entropy it tends to be the most informative on average; the modes that have this interval as major and minor respectively are roughly a 50-50 split. This tells us that unlike in the diatonic scale, thirds and sixths are the least informative in distinguishing smitonic modes. On the other hand, seconds, fourths and sevenths are highly informative.

In orgone, these scale degrees appear in the most consonant triads and tetrads of 11edo orgone, namely 8:9:11:15, 8:9:11:14 and 16:17:22:28. Those chords are therefore crucial for Orgone[7] modal harmony.

18edo smitonic

Degree 18edo (soft) 25edo (supersoft) 43edo Note name on J Approximate ratios #Gens up
unison 0\18, 0.0 0\25, 0.0 0\43, 0.0 J 1/1 0
chroma 1\18, 66.7 1\25, 48.0 2\43, 55.8 J& -7
dim. mos2nd 1\18, 66.7 2\25, 96.0 3\43, 83.7 K@@ +11
minor mos2nd 2\18, 133.3 3\25, 144.0 5\43, 139.5 K@ 13/12 +4
major mos2nd 3\18, 200.0 4\25, 192.0 7\43, 195.3 K 9/8, 10/9 -3
aug. mos2nd 4\18, 266.7 5\25, 240.0 9\43, 251.2 K& -10
dim. mos3rd 4\18, 266.7 6\25, 288.0 10\43, 279.1 L@ +8
perf. mos3rd 5\18, 333.3 7\25, 336.0 12\43, 334.9 L 17/14, 40/33 +1
aug. mos3rd 6\18, 400.0 8\25, 384.4 14\43, 390.7 L& 5/4 -6
doubly aug. mos3rd 7\18, 466.7 9\25, 432.0 16\43, 446.5 L&& -13
dim. mos4th 6\18, 400.0 9\25, 432.0 15\43, 418.6 M@@ +12
minor mos4th 7\18, 466.7 10\25, 480.0 17\43, 474.4 M@ 21/16 +5
major mos4th 8\18, 533.3 11\25, 528.0 19\43, 530.2 M 19/14, 34/25 -2
aug. mos4th 9\18, 600.0 12\25, 576.0 21\43, 586.0 M& 7/5 -9
dim. mos5th 9\18, 600.0 13\25, 624.0 22\43, 614.0 N@ 10/7 +9
minor mos5th 10\18, 666.7 14\25, 672.0 24\43, 669.8 N 28/19, 25/17 +2
major mos5th 11\18, 733.3 15\25, 720.0 26\43, 725.6 N& 32/21 -5
aug. mos5th 12\18, 800.0 16\25, 768.0 28\43, 781.4 N&& -12
doubly dim. mos6th 11\18, 733.3 16\25, 768.0 27\43, 753.5 O@@ +13
dim. mos6th 12\18, 800.0 17\25, 816.0 29\43, 809.3 O@ 8/5 +6
perf. mos6th 13\18, 866.7 18\25, 864.0 31\43, 865.1 O 28/17, 33/20 -1
aug. mos6th 14\18, 933.3 19\25, 912.0 33\43, 920.9 O& -8
dim. mos7th 14\18, 933.3 20\25, 960.0 34\34, 948.8 P@ +10
minor mos7th 15\18, 1000.0 21\25, 1008.0 36\43, 1004.7 P 16/9, 9/5 +3
major mos7th 16\18, 1066.7 22\25, 1056.0 38\43, 1060.5 P& 24/13 -4
aug. mos7th 17\18, 1133.3 23\25, 1104.0 40\43, 1116.3 P& -11
dim. mosoctave 17\18, 1133.3 24\25, 1152.0 41\43, 1144.2 J@ +7

Modal harmony

MODMOSes and chroma modification become more important...

Treat it as neutralized mavila?