5L 5s

From Xenharmonic Wiki
Jump to navigation Jump to search
↖ 4L 4s ↑5L 4s 6L 4s ↗
← 4L 5s5L 5s 6L 5s →
↙ 4L 6s ↓5L 6s 6L 6s ↘
┌╥┬╥┬╥┬╥┬╥┬┐
│║│║│║│║│║││
││││││││││││
└┴┴┴┴┴┴┴┴┴┴┘
Scale structure
Step pattern LsLsLsLsLs
sLsLsLsLsL
Equave 2/1 (1200.0¢)
Period 1\5 (240.0¢)
Generator size
Bright 1\10 to 1\5 (120.0¢ to 240.0¢)
Dark 0\5 to 1\10 (0.0¢ to 120.0¢)
TAMNAMS information
Name pentawood
Prefix pentawd-
Abbrev. pw
Related MOS scales
Parent none
Sister 5L 5s (self)
Daughters 10L 5s, 5L 10s
Neutralized 10edo
2-Flought 15L 5s, 5L 15s
Equal tunings
Equalized (L:s = 1:1) 1\10 (120.0¢)
Supersoft (L:s = 4:3) 4\35 (137.1¢)
Soft (L:s = 3:2) 3\25 (144.0¢)
Semisoft (L:s = 5:3) 5\40 (150.0¢)
Basic (L:s = 2:1) 2\15 (160.0¢)
Semihard (L:s = 5:2) 5\35 (171.4¢)
Hard (L:s = 3:1) 3\20 (180.0¢)
Superhard (L:s = 4:1) 4\25 (192.0¢)
Collapsed (L:s = 1:0) 1\5 (240.0¢)

5L 5s, named pentawood in TAMNAMS, is a 2/1-equivalent (octave-equivalent) moment of symmetry scale containing 5 large steps and 5 small steps, with a period of 1 large step and 1 small step that repeats every 240.0¢, or 5 times every octave. Generators that produce this scale range from 120¢ to 240¢, or from 0¢ to 120¢. Scales of the true MOS form, where every period is the same, are proper because there is only one small step per period. There is only one significant harmonic entropy minimum with this MOS pattern: blackwood, in which intervals of the prime numbers 3 and 7 are all represented using steps of 5edo, and the generator reaches intervals of 5 like 6/5, 5/4, or 7/5.

In addition to the true MOS form (LsLsLsLsLs and sLsLsLsLsL), there are 6 near-MOS forms – LLssLsLsLs, LLssLLssLs, LLsLssLsLs, LLsLssLLss, LLsLsLssLs, LLsLsLsLss – in which the period and its multiples (intervals of 2, 4, 6, and 8 mossteps) have more than two varieties. These forms are proper if the bright generator is less than 160¢.

Modes

Modes of 5L 5s
UDP Rotational order Step pattern
5|0(5) 1 LsLsLsLsLs
0|5(5) 2 sLsLsLsLsL

Scale tree

Generator Cents L s L/s Comments
Chroma-positive Chroma-negative
1\10 120.000 120.000 1 1 1.000
6\55 130.909 109.091 6 5 1.200 Qintosec↑
5\45 133.333 106.667 5 4 1.250
9\80 135.000 105.000 9 7 1.286
4\35 137.143 102.857 4 3 1.333
11\95 138.947 101.053 11 8 1.375
7\60 140.000 100.000 7 5 1.400 Warlock
10\85 141.176 98.824 10 7 1.428
3\25 144.000 96.000 3 2 1.500 L/s = 3/2
11\90 146.667 93.333 11 7 1.571
8\65 147.692 92.308 8 5 1.600
13\105 148.571 91.429 13 8 1.625 Unnamed golden tuning
5\40 150.000 90.000 5 3 1.667
12\95 151.579 88.421 12 7 1.714
7\55 152.727 87.273 7 4 1.750 Quinkee
9\70 154.286 85.714 9 5 1.800
2\15 160.000 80.000 2 1 2.000 Basic pentawood
Blacksmith is optimal around here
9\65 166.154 73.846 9 4 2.250 Trisedodge
7\50 168.000 72.000 7 3 2.333
12\85 169.412 70.588 12 5 2.400
5\35 171.429 68.571 5 2 2.500
13\90 173.333 66.667 13 5 2.600 Unnamed golden tuning
8\55 174.545 65.455 8 3 2.667
11\75 176.000 64.000 11 4 2.750
3\20 180.000 60.000 3 1 3.000 L/s = 3/1
10\65 184.615 55.385 10 3 3.333
7\45 186.667 53.333 7 2 3.500
11\70 188.571 51.429 11 3 3.667
4\25 192.000 48.000 4 1 4.000
9\55 196.364 43.636 9 2 4.500
5\30 200.000 40.000 5 1 5.000
6\35 205.714 34.286 6 1 6.000 Cloudtone↓
1\5 240.000 0.000 1 0 → inf