8L 5s

Revision as of 20:30, 19 February 2024 by Ganaram inukshuk (talk | contribs) (Reworded intro)

8L 5s is a 2/1-equivalent (octave-equivalent) moment of symmetry scale containing 8 large steps and 5 small steps, repeating every octave. 8L 5s is a child scale of 5L 3s, expanding it by 5 tones. Generators that produce this scale range from 738.5 ¢ to 750 ¢, or from 450 ¢ to 461.5 ¢. 8L 5s represents the chromatic scale of Semidim, Tridec, Ammonite and Petrtri temperaments. It represents tempered chains of the 13:10 or 17:13 semisixth, thus rendering 10:13:17 as an equidistant triad and tempering out 170:169. Also, the ratio between the generator of this MOS and its inverse is close to logarithmic phi, or even logarithmic phi itself.

↖ 7L 4s ↑ 8L 4s 9L 4s ↗
← 7L 5s 8L 5s 9L 5s →
↙ 7L 6s ↓ 8L 6s 9L 6s ↘
Scale structure
Step pattern LLsLLsLsLLsLs
sLsLLsLsLLsLL
Equave 2/1 (1200.0 ¢)
Period 2/1 (1200.0 ¢)
Generator size
Bright 8\13 to 5\8 (738.5 ¢ to 750.0 ¢)
Dark 3\8 to 5\13 (450.0 ¢ to 461.5 ¢)
TAMNAMS information
Related to 5L 3s (oneirotonic)
With tunings 1:1 to 2:1 (soft-of-basic)
Related MOS scales
Parent 5L 3s
Sister 5L 8s
Daughters 13L 8s, 8L 13s
Neutralized 3L 10s
2-Flought 21L 5s, 8L 18s
Equal tunings
Equalized (L:s = 1:1) 8\13 (738.5 ¢)
Supersoft (L:s = 4:3) 29\47 (740.4 ¢)
Soft (L:s = 3:2) 21\34 (741.2 ¢)
Semisoft (L:s = 5:3) 34\55 (741.8 ¢)
Basic (L:s = 2:1) 13\21 (742.9 ¢)
Semihard (L:s = 5:2) 31\50 (744.0 ¢)
Hard (L:s = 3:1) 18\29 (744.8 ¢)
Superhard (L:s = 4:1) 23\37 (745.9 ¢)
Collapsed (L:s = 1:0) 5\8 (750.0 ¢)
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Modes

Modes of 8L 5s
UDP Cyclic
order
Step
pattern
12|0 1 LLsLLsLsLLsLs
11|1 9 LLsLsLLsLLsLs
10|2 4 LLsLsLLsLsLLs
9|3 12 LsLLsLLsLsLLs
8|4 7 LsLLsLsLLsLLs
7|5 2 LsLLsLsLLsLsL
6|6 10 LsLsLLsLLsLsL
5|7 5 LsLsLLsLsLLsL
4|8 13 sLLsLLsLsLLsL
3|9 8 sLLsLsLLsLLsL
2|10 3 sLLsLsLLsLsLL
1|11 11 sLsLLsLLsLsLL
0|12 6 sLsLLsLsLLsLL

Scale tree

  Template: Scale tree is deprecated. Please use Template: MOS tuning spectrum instead. Details:
Use of a single Comments parameter has become unmaintainable. Existing scale trees should be migrated to the new template, where comments are entered using a step ratio p/q as a parameter:
{{MOS tuning spectrum
| 3/2 = Example comment
| 4/3 = Another example comment
}}


The parameters tuning and depth have been replaced with Scale Signature and Depth, respectively.


Scale tree and tuning spectrum of 8L 5s
Generator(edo) Cents Step ratio Comments
Bright Dark L:s Hardness
8\13 738.462 461.538 1:1 1.000 Equalized 8L 5s
45\73 739.726 460.274 6:5 1.200
37\60 740.000 460.000 5:4 1.250
66\107 740.187 459.813 9:7 1.286
29\47 740.426 459.574 4:3 1.333 Supersoft 8L 5s
79\128 740.625 459.375 11:8 1.375
50\81 740.741 459.259 7:5 1.400
71\115 740.870 459.130 10:7 1.429
21\34 741.176 458.824 3:2 1.500 Soft 8L 5s
76\123 741.463 458.537 11:7 1.571
55\89 741.573 458.427 8:5 1.600
89\144 741.667 458.333 13:8 1.625
34\55 741.818 458.182 5:3 1.667 Semisoft 8L 5s
81\131 741.985 458.015 12:7 1.714
47\76 742.105 457.895 7:4 1.750
60\97 742.268 457.732 9:5 1.800
13\21 742.857 457.143 2:1 2.000 Basic 8L 5s
Scales with tunings softer than this are proper
57\92 743.478 456.522 9:4 2.250
44\71 743.662 456.338 7:3 2.333
75\121 743.802 456.198 12:5 2.400
31\50 744.000 456.000 5:2 2.500 Semihard 8L 5s
80\129 744.186 455.814 13:5 2.600
49\79 744.304 455.696 8:3 2.667
67\108 744.444 455.556 11:4 2.750
18\29 744.828 455.172 3:1 3.000 Hard 8L 5s
59\95 745.263 454.737 10:3 3.333
41\66 745.455 454.545 7:2 3.500
64\103 745.631 454.369 11:3 3.667
23\37 745.946 454.054 4:1 4.000 Superhard 8L 5s
51\82 746.341 453.659 9:2 4.500
28\45 746.667 453.333 5:1 5.000
33\53 747.170 452.830 6:1 6.000
5\8 750.000 450.000 1:0 → ∞ Collapsed 8L 5s