576edo: Difference between revisions

From Xenharmonic Wiki
Jump to navigation Jump to search
Cleanup; clarify the title row of the rank-2 temp table; -redundant categories; and mark a few more things to clarify
Eliora (talk | contribs)
Theory: cleanup
Line 3: Line 3:


== Theory ==
== Theory ==
576 is equal to 24 squared, which in itself is double the world-predominant [[12edo]]. It is known as a [[Highly composite equal division #Highly factorable numbers|highly factorable edo]], which enables it to be played through JI-agnostic approaches that make use of its divisors (see [[#Subsets and supersets]] section below). This approach may be preferrable since the [[patent val]] will create sequences that fall aside by 1\576 of each other{{clarify}}, which may not "live up to the spirit" of a composite number like 576.  
576edo is [[consistent]] in the 7-odd-limit, though the error on harmonic [[5/4|5]] is quite large. As a corollary, 576edo is an excellent 2.3.7 subgroup tuning. It tempers out the [[septimal ennealimma]], assining [[7/6]] to 2\9, as well as {{monzo| 99 -66 0 2 }}, {{monzo| 110 -57 0 -7 }} , and {{monzo| 88 -75 0 11 }}. In the 5-limit,  the patent val of 576edo [[support]]s the [[atomic]] temperament and the [[amity]] temperament. The 576c val supports [[maquila]]. The 576ccd val, {{val| 576 913 1336 1618 }}, is a tuning for the [[garibaldi]] temperament in the 7-limit. In addition, in this case 5/4 comes from [[72edo]], and 7/4 comes form 288edo.


Nonetheless, 576edo does offer simple interpretations. Despite having bad 5/4, 576edo is [[consistent]] in the 7-odd-limit. As a corollary, 576edo is an excellent 2.3.7 subgroup tuning. Using the patent val, it tempers out the [[septimal ennealimma]], 40353607/40310784, and assigns 7/6 to 2\9 of the octave, property that ultimately derives from [[9edo]]. However, other commas being tempered out are far more complex – {{monzo| 99 -66 2 }}, {{monzo| 110 -57 -7 }}, and {{monzo| 88 -75 11 }}. The associated rank-2 temperaments are 94 & 576, 41 & 535, and 229 & 347.
In higher limits, the 2.3.7 subgroup can be used with optional additions of [[19/16|19]] or [[29/16|29]], or fractional subgroups using [[13/10]].
 
In the 5-limit,  the patent val of 576edo [[support]]s the [[atomic]] temperament and the [[amity]] temperament. The 576c val supports [[maquila]]. The 576ccd val, {{val| 576 913 1336 1618 }}, is a tuning for the [[garibaldi]] temperament in the 7-limit. In addition, in this case 5/4 comes from [[72edo]], and 7/4 comes form 288edo.
 
576edo supports a messed-up variant of the [[rectified hebrew]] scale<sup>[which?]</sup>, but with step hardness of 5:3 instead of 3:2, and in which 5/4 is reached via 359 third-tone generators down instead of 6 generators up. The relationship that 7/4 is 15 generators and 13/8 is 13 steps is still preserved.


=== Prime harmonics ===
=== Prime harmonics ===
Line 15: Line 11:


=== Subsets and supersets ===
=== Subsets and supersets ===
576edo's nontrivial divisors are {{EDOs| 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 64, 72, 96, 144, 192, and 288 }}. Some of these have been put into practical use. 72edo has been used in {{w|Byzantine music|Byzantine chanting}}, has been theoreticized by {{w|Alois Hába|Alois Haba}} and [[Ivan Wyschnegradsky]], and has been used by jazz musician [[Joe Maneri]]. 96edo has been used by [[Julian Carrillo]]. Because of the compositeness, it may be preferrable to make references to smaller edos instead of using the best approximation.  
Since 576 factors as {{Factorization|576}}, 576edo has subset edos {{EDOs| 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 64, 72, 96, 144, 192, and 288 }}, of which {{EDOs|12, 24, 72, and 96}} are particularly notable. Overall, 576edo contains a number of notable divisions that are multiples of 12, and it is also a [[Highly composite equal division#Highly factorable numbers|highly factorable]] edo.


== Regular temperament properties ==
== Regular temperament properties ==

Revision as of 12:46, 11 February 2024

← 575edo 576edo 577edo →
Prime factorization 26 × 32
Step size 2.08333 ¢ 
Fifth 337\576 (702.083 ¢)
Semitones (A1:m2) 55:43 (114.6 ¢ : 89.58 ¢)
Consistency limit 7
Distinct consistency limit 7

Template:EDO intro

Theory

576edo is consistent in the 7-odd-limit, though the error on harmonic 5 is quite large. As a corollary, 576edo is an excellent 2.3.7 subgroup tuning. It tempers out the septimal ennealimma, assining 7/6 to 2\9, as well as [99 -66 0 2, [110 -57 0 -7 , and [88 -75 0 11. In the 5-limit, the patent val of 576edo supports the atomic temperament and the amity temperament. The 576c val supports maquila. The 576ccd val, 576 913 1336 1618], is a tuning for the garibaldi temperament in the 7-limit. In addition, in this case 5/4 comes from 72edo, and 7/4 comes form 288edo.

In higher limits, the 2.3.7 subgroup can be used with optional additions of 19 or 29, or fractional subgroups using 13/10.

Prime harmonics

Approximation of prime harmonics in 576edo
Harmonic 2 3 5 7 11 13 17 19 23 29 31
Error Absolute (¢) +0.000 +0.128 -0.897 -0.076 +0.765 -0.944 -0.789 +0.404 +0.892 -0.411 +0.798
Relative (%) +0.0 +6.2 -43.1 -3.6 +36.7 -45.3 -37.9 +19.4 +42.8 -19.7 +38.3
Steps
(reduced)
576
(0)
913
(337)
1337
(185)
1617
(465)
1993
(265)
2131
(403)
2354
(50)
2447
(143)
2606
(302)
2798
(494)
2854
(550)

Subsets and supersets

Since 576 factors as 26 × 32, 576edo has subset edos 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 64, 72, 96, 144, 192, and 288, of which 12, 24, 72, and 96 are particularly notable. Overall, 576edo contains a number of notable divisions that are multiples of 12, and it is also a highly factorable edo.

Regular temperament properties

Rank-2 temperaments

Table of rank-2 temperaments by generator
Periods
per 8ve
Generator* Cents* Associated
Ratio*
Temperaments
1 163\576 339.583 243/200 Amity (576)
12 239\576
(1\576)
497.916
(2.083)
4/3
(32805/32768)
Atomic (576)

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