401edo: Difference between revisions

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== Regular temperament properties ==
== Regular temperament properties ==
{{comma basis begin}}
{| class="wikitable center-4 center-5 center-6"
|-
! rowspan="2" | [[Subgroup]]
! rowspan="2" | [[Comma list]]
! rowspan="2" | [[Mapping]]
! rowspan="2" | Optimal<br />8ve stretch (¢)
! colspan="2" | Tuning error
|-
! [[TE error|Absolute]] (¢)
! [[TE simple badness|Relative]] (%)
|-
|-
| 2.3
| 2.3
Line 50: Line 59:
| 0.3348
| 0.3348
| 11.19
| 11.19
{{comma basis end}}
|}


=== Rank-2 temperaments ===
=== Rank-2 temperaments ===
{{rank-2 begin}}
{| class="wikitable center-all left-5"
|+ style="font-size: 105%;" | Table of rank-2 temperaments by generator
|-
! Periods<br />per 8ve
! Generator*
! Cents*
! Associated<br />ratio*
! Temperaments
|-
|-
| 1
| 1
Line 60: Line 76:
| 75/56
| 75/56
| [[Diatessic]]
| [[Diatessic]]
{{rank-2 end}}
|}
{{orf}}
<nowiki />* [[Normal lists|Octave-reduced form]], reduced to the first half-octave, and [[Normal lists|minimal form]] in parentheses if it is distinct


== Scales ==
== Scales ==

Revision as of 12:53, 16 November 2024

← 400edo 401edo 402edo →
Prime factorization 401 (prime)
Step size 2.99252 ¢ 
Fifth 235\401 (703.242 ¢)
Semitones (A1:m2) 41:28 (122.7 ¢ : 83.79 ¢)
Dual sharp fifth 235\401 (703.242 ¢)
Dual flat fifth 234\401 (700.249 ¢)
Dual major 2nd 68\401 (203.491 ¢)
Consistency limit 3
Distinct consistency limit 3

Template:EDO intro

Theory

401edo is inconsistent to the 5-odd-limit and harmonic 3 is about halfway between its steps. Otherwise, it has a reasonable approximation to harmonics 5, 7, 9, 11, and 13, making it suitable for a 2.9.5.7.11.13 subgroup interpretation.

Using the patent val nonetheless, the equal temperament tempers out 283115520/282475249 and 703125/702464 in the 7-limit; 35156250/35153041, 2097152/2096325, 117649/117612, 226492416/226474325, 9765625/9732096, 42875/42768, 1375/1372, 5632/5625, 15488/15435, 202397184/201768035, 102487/102400 and 805255/802816 in the 11-limit. It provides the optimal patent val for diatessic, the 140 & 261 temperament.

Odd harmonics

Approximation of odd harmonics in 401edo
Harmonic 3 5 7 9 11 13 15 17 19 21 23
Error Absolute (¢) +1.29 -0.28 +0.75 -0.42 -0.69 +0.37 +1.01 -0.22 -1.25 -0.96 +0.15
Relative (%) +43.0 -9.3 +25.1 -14.0 -23.2 +12.4 +33.7 -7.3 -41.9 -31.9 +5.2
Steps
(reduced) 		636
(235) 		931
(129) 		1126
(324) 		1271
(68) 		1387
(184) 		1484
(281) 		1567
(364) 		1639
(35) 		1703
(99) 		1761
(157) 		1814
(210)

Subsets and supersets

401edo is the 79th prime edo

Regular temperament properties

Subgroup Comma list Mapping Optimal
8ve stretch (¢) 		Tuning error
Absolute (¢) Relative (%)
2.3 [636 -401⟩ [⟨401 636]] −0.4060 0.4058 13.56
2.3.5 15625/15552, [107 -66 -1⟩ [⟨401 636 931]] −0.2307 0.4139 13.83
2.3.5.7 10976/10935, 15625/15552, 67108864/66706983 [⟨401 636 931 1126]] −0.2400 0.3588 11.99
2.3.5.7.11 2200/2187, 1375/1372, 5632/5625, 102487/102400 [⟨401​ 636 ​931 ​1126 ​1387 ​]] −0.1518 0.3661 12.23
2.3.5.7.11.13 325/324, 352/351, 625/624, 1375/1372, 3276800/3270267 [⟨401 ​636 ​931 ​1126 ​1387 ​1484]] −0.1431 0.3348 11.19

Rank-2 temperaments

Table of rank-2 temperaments by generator
Periods
per 8ve 		Generator* Cents* Associated
ratio* 		Temperaments
1 169\401 505.74 75/56 Diatessic

* Octave-reduced form, reduced to the first half-octave, and minimal form in parentheses if it is distinct

Scales

Music

Francium
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