7L 5s

Revision as of 07:06, 19 February 2024 by Ganaram inukshuk (talk | contribs) (Scale tree: Replaced scale tree)

7L 5s is a 2/1-equivalent (octave-equivalent) moment of symmetry scale containing 7 large steps and 5 small steps, repeating every octave. 7L 5s is a child scale of 5L 2s, expanding it by 5 tones. Generators that produce this scale range from 500 ¢ to 514.3 ¢, or from 685.7 ¢ to 700 ¢. 7L 5s represents the chromatic scale of meantone, or meantone chromatic scale. Such scales are characterized by having a small step (diatonic semitone) that is larger than the chroma (chromatic semitone), the reverse of 5L 7s.

↖ 6L 4s ↑ 7L 4s 8L 4s ↗
← 6L 5s 7L 5s 8L 5s →
↙ 6L 6s ↓ 7L 6s 8L 6s ↘
Scale structure
Step pattern LLsLsLLsLsLs
sLsLsLLsLsLL
Equave 2/1 (1200.0 ¢)
Period 2/1 (1200.0 ¢)
Generator size
Bright 5\12 to 3\7 (500.0 ¢ to 514.3 ¢)
Dark 4\7 to 7\12 (685.7 ¢ to 700.0 ¢)
TAMNAMS information
Related to 5L 2s (diatonic)
With tunings 1:1 to 2:1 (soft-of-basic)
Related MOS scales
Parent 5L 2s
Sister 5L 7s
Daughters 12L 7s, 7L 12s
Neutralized 2L 10s
2-Flought 19L 5s, 7L 17s
Equal tunings
Equalized (L:s = 1:1) 5\12 (500.0 ¢)
Supersoft (L:s = 4:3) 18\43 (502.3 ¢)
Soft (L:s = 3:2) 13\31 (503.2 ¢)
Semisoft (L:s = 5:3) 21\50 (504.0 ¢)
Basic (L:s = 2:1) 8\19 (505.3 ¢)
Semihard (L:s = 5:2) 19\45 (506.7 ¢)
Hard (L:s = 3:1) 11\26 (507.7 ¢)
Superhard (L:s = 4:1) 14\33 (509.1 ¢)
Collapsed (L:s = 1:0) 3\7 (514.3 ¢)
ViewTalkEdit

Meantone is the only notable harmonic entropy minimum.

Modes

Both Eliora and Ganaram have independently proposed mode names based on names of the months. The latter scheme uses mode names from the Gregorian calendar, starting with January assigned to the step pattern LsLsLsLLsLsL, with successive rotations assigned to successive months. The latter scheme is based on month names from the Roman calendar, starting with Mensis Martius as the brightest mode, with successive month names for each mode by descending brightness.

Modes of 7L 5s
UDP Cyclic
order
Step
pattern
11|0 1 LLsLsLLsLsLs
10|1 6 LLsLsLsLLsLs
9|2 11 LsLLsLsLLsLs
8|3 4 LsLLsLsLsLLs
7|4 9 LsLsLLsLsLLs
6|5 2 LsLsLLsLsLsL
5|6 7 LsLsLsLLsLsL
4|7 12 sLLsLsLLsLsL
3|8 5 sLLsLsLsLLsL
2|9 10 sLsLLsLsLLsL
1|10 3 sLsLLsLsLsLL
0|11 8 sLsLsLLsLsLL
Modes of 7L 5s
UDP Cyclic
order
Step
pattern
11|0 1 LLsLsLLsLsLs
10|1 6 LLsLsLsLLsLs
9|2 11 LsLLsLsLLsLs
8|3 4 LsLLsLsLsLLs
7|4 9 LsLsLLsLsLLs
6|5 2 LsLsLLsLsLsL
5|6 7 LsLsLsLLsLsL
4|7 12 sLLsLsLLsLsL
3|8 5 sLLsLsLsLLsL
2|9 10 sLsLLsLsLLsL
1|10 3 sLsLLsLsLsLL
0|11 8 sLsLsLLsLsLL

Scales

  • Meaneb471a – an equal beating tuning of meantone
  • Meantone12 – 31edo tuning
  • Ratwolf – 20/13 wolf fifth tuning of meantone
  • Meaneb471 – the other equal beating tuning of meantone
  • Flattone12 – 13-limit POTE tuning of flattone

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 7L 5s
Generator(edo) Cents Step ratio Comments
Bright Dark L:s Hardness
5\12 500.000 700.000 1:1 1.000 Equalized 7L 5s
28\67 501.493 698.507 6:5 1.200
23\55 501.818 698.182 5:4 1.250
41\98 502.041 697.959 9:7 1.286
18\43 502.326 697.674 4:3 1.333 Supersoft 7L 5s
49\117 502.564 697.436 11:8 1.375
31\74 502.703 697.297 7:5 1.400
44\105 502.857 697.143 10:7 1.429
13\31 503.226 696.774 3:2 1.500 Soft 7L 5s
47\112 503.571 696.429 11:7 1.571
34\81 503.704 696.296 8:5 1.600
55\131 503.817 696.183 13:8 1.625
21\50 504.000 696.000 5:3 1.667 Semisoft 7L 5s
50\119 504.202 695.798 12:7 1.714
29\69 504.348 695.652 7:4 1.750
37\88 504.545 695.455 9:5 1.800
8\19 505.263 694.737 2:1 2.000 Basic 7L 5s
Scales with tunings softer than this are proper
35\83 506.024 693.976 9:4 2.250
27\64 506.250 693.750 7:3 2.333
46\109 506.422 693.578 12:5 2.400
19\45 506.667 693.333 5:2 2.500 Semihard 7L 5s
49\116 506.897 693.103 13:5 2.600
30\71 507.042 692.958 8:3 2.667
41\97 507.216 692.784 11:4 2.750
11\26 507.692 692.308 3:1 3.000 Hard 7L 5s
36\85 508.235 691.765 10:3 3.333
25\59 508.475 691.525 7:2 3.500
39\92 508.696 691.304 11:3 3.667
14\33 509.091 690.909 4:1 4.000 Superhard 7L 5s
31\73 509.589 690.411 9:2 4.500
17\40 510.000 690.000 5:1 5.000
20\47 510.638 689.362 6:1 6.000
3\7 514.286 685.714 1:0 → ∞ Collapsed 7L 5s