205edo: Difference between revisions

+more chords and move the factorization properties below
Cleanup and update
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{{Infobox ET}}
{{Infobox ET}}
The '''205 equal divisions of the octave''' ('''205edo'''), or the '''205(-tone) equal temperament''' ('''205tet''', '''205et''') when viewed from a [[regular temperament]] perspective, divides the [[octave]] into 205 parts of 5.854 [[cent]]s each.
{{EDO intro|205}}


== Theory ==
== Theory ==
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The 119\205 meantone fifth is extremely close to the 1/4-comma fifth, being only 0.007 cents sharp of it. Moreover the steps are half a cent flat of 1/4 of a syntonic comma. This makes the Tonal Plexus keyboard potentially of use in implementing [[Wikipedia: Nicola Vicentino|Nicola Vicentino]]'s [http://www.tonalsoft.com/monzo/vicentino/vicentino.aspx adaptive-JI scheme of 1555]. It also means that authentic 1/4-comma meantone tuning is, for practical purposes, available in 205 and allows for historically authentic performances of 1/4-comma music on the historically newfangled Tonal Plexus.
The 119\205 meantone fifth is extremely close to the 1/4-comma fifth, being only 0.007 cents sharp of it. Moreover the steps are half a cent flat of 1/4 of a syntonic comma. This makes the Tonal Plexus keyboard potentially of use in implementing [[Wikipedia: Nicola Vicentino|Nicola Vicentino]]'s [http://www.tonalsoft.com/monzo/vicentino/vicentino.aspx adaptive-JI scheme of 1555]. It also means that authentic 1/4-comma meantone tuning is, for practical purposes, available in 205 and allows for historically authentic performances of 1/4-comma music on the historically newfangled Tonal Plexus.


=== Miscellaneous properties ===
=== Divisors ===
205 factors into primes as 5 × 41, a fact some advocates of the division make use of; it is also [[2460edo|2460/12]], so that a single step is precisely 12 [[mina]]s.
205 factors into primes as 5 × 41, a fact some advocates of the division make use of; it is also [[2460edo|2460/12]], so that a single step is precisely 12 [[mina]]s.


== Regular temperament properties ==
== Regular temperament properties ==
{| class="wikitable center-4 center-5 center-6"
{| class="wikitable center-4 center-5 center-6"
! rowspan="2" | Subgroup
! rowspan="2" | [[Subgroup]]
! rowspan="2" | [[Comma list]]
! rowspan="2" | [[Comma list]]
! rowspan="2" | [[Mapping]]
! rowspan="2" | [[Mapping]]
! rowspan="2" | Optimal<br>8ve stretch (¢)
! rowspan="2" | Optimal<br>8ve Stretch (¢)
! colspan="2" | Tuning error
! colspan="2" | Tuning Error
|-
|-
! [[TE error|Absolute]] (¢)
! [[TE error|Absolute]] (¢)
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{| class="wikitable center-all left-5"
{| class="wikitable center-all left-5"
|+Table of rank-2 temperaments by generator
|+Table of rank-2 temperaments by generator
! Periods<br>per octave
! Periods<br>per 8ve
! Generator<br>(reduced)
! Generator<br>(Reduced)
! Cents<br>(reduced)
! Cents<br>(Reduced)
! Associated<br>ratio
! Associated<br>Ratio
! Temperaments
! Temperaments
|-
|-
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| 386.341<br>(5.85)
| 386.341<br>(5.85)
| 5/4<br>(32805/32768)
| 5/4<br>(32805/32768)
| [[Counterpyth]]
| [[Countercomp]]
|}
|}


== Scales ==
== Scales ==
=== Quanic (24\205) MOS ===
=== Quanic (24\205) mos ===
==== 17 note ====
; 17-note
11 13 11 13 11 13 11 13 11 13 11 13 11 13 11 13 13
: 11 13 11 13 11 13 11 13 11 13 11 13 11 13 11 13 13
; 26-note
: 11 11 2 11 11 2 11 11 2 11 11 2 11 11 2 11 11 2 11 11 2 11 11 2 11 2


==== 26 note ====
=== Amity (58\205) mos ===
11 11 2 11 11 2 11 11 2 11 11 2 11 11 2 11 11 2 11 11 2 11 11 2 11 2
; 11-note
: 27 27 4 27 27 4 27 27 4 27 4
; 18-note
: 23 4 23 4 4 23 4 23 4 4 23 4 23 4 4 23 4 4
; 25-note
: 19 4 4 19 4 4 4 19 4 4 19 4 4 4 19 4 4 19 4 4 4 19 4 4 4


=== Amity (58\205) MOS ===
=== Hemithirds (33\205) mos ===
; 13-note
: 26 7 26 7 26 7 26 7 26 7 26 7 7
; 19-note
: 19 7 7 19 7 7 19 7 7 19 7 7 19 7 7 19 7 7 7
; 25-note
: 12 7 7 7 12 7 7 7 12 7 7 7 12 7 7 7 12 7 7 7 12 7 7 7 7
; 31-notes
: 5 7 7 7 7 5 7 7 7 7 5 7 7 7 7 5 7 7 7 7 5 7 7 7 7 5 7 7 7 7 7


==== 11 note ====
=== Meantone (119\205) mos ===
27 27 4 27 27 4 27 27 4 27 4
; 12-note
: 13 20 13 20 13 20 20 13 20 13 20 20
; 19-note
: 13 13 7 13 13 7 13 13 7 13 7 13 13 7 13 13 7 13 7
; 31-note
: 6 7 6 7 7 6 7 6 7 7 6 7 6 7 7 6 7 7 6 7 6 7 7 6 7 6 7 7 6 7 7


==== 18 note ====
=== Myna (53\205) mos ===
23 4 23 4 4 23 4 23 4 4 23 4 23 4 4 23 4 4
; 11-note
: 7 7 39 7 7 39 7 7 39 7 39
; 15-note
: 7 7 7 32 7 7 7 32 7 7 7 32 7 7 32
; 19-note
: 7 7 7 7 25 7 7 7 7 25 7 7 7 7 25 7 7 7 25
; 23-note
: 7 7 7 7 7 18 7 7 7 7 7 18 7 7 7 7 7 18 7 7 7 7 18
; 27-note
: 7 7 7 7 7 7 11 7 7 7 7 7 7 11 7 7 7 7 7 7 11 7 7 7 7 7 11
; 31-note
: 7 7 7 7 7 7 7 4 7 7 7 7 7 7 7 4 7 7 7 7 7 7 7 4 7 7 7 7 7 7 4


==== 25 note ====
=== Porcupine (28\205) mos ===
19 4 4 19 4 4 4 19 4 4 19 4 4 4 19 4 4 19 4 4 4 19 4 4 4
; 15-note
 
: 19 9 19 9 19 9 19 9 19 9 19 9 19 9 9
=== Hemithirds (33\205) MOS ===
; 22-note
==== 13 note ====
: 10 9 9 10 9 9 10 9 9 10 9 9 10 9 9 10 9 9 10 9 9 9
26 7 26 7 26 7 26 7 26 7 26 7 7
; 29-note
 
: 1 9 9 9 1 9 9 9 1 9 9 9 1 9 9 9 1 9 9 9 1 9 9 9 1 9 9 9 9
==== 19 note ====
19 7 7 19 7 7 19 7 7 19 7 7 19 7 7 19 7 7 7
 
==== 25 note ====
12 7 7 7 12 7 7 7 12 7 7 7 12 7 7 7 12 7 7 7 12 7 7 7 7
 
==== 31 notes ====
5 7 7 7 7 5 7 7 7 7 5 7 7 7 7 5 7 7 7 7 5 7 7 7 7 5 7 7 7 7 7
 
=== Meantone (119\205) MOS ===
==== 12 note ====
13 20 13 20 13 20 20 13 20 13 20 20
 
==== 19 note ====
13 13 7 13 13 7 13 13 7 13 7 13 13 7 13 13 7 13 7
 
==== 31 notes ====
6 7 6 7 7 6 7 6 7 7 6 7 6 7 7 6 7 7 6 7 6 7 7 6 7 6 7 7 6 7 7
 
=== Myna (53\205) MOS ===
==== 11 note ====
7 7 39 7 7 39 7 7 39 7 39
 
==== 15 note ====
7 7 7 32 7 7 7 32 7 7 7 32 7 7 32
 
==== 19 note ====
7 7 7 7 25 7 7 7 7 25 7 7 7 7 25 7 7 7 25
 
==== 23 note ====
7 7 7 7 7 18 7 7 7 7 7 18 7 7 7 7 7 18 7 7 7 7 18
 
==== 27 note ====
7 7 7 7 7 7 11 7 7 7 7 7 7 11 7 7 7 7 7 7 11 7 7 7 7 7 11
 
==== 31 notes ====
7 7 7 7 7 7 7 4 7 7 7 7 7 7 7 4 7 7 7 7 7 7 7 4 7 7 7 7 7 7 4
 
=== Porcupine (28\205) MOS ===
==== 15 note ====
19 9 19 9 19 9 19 9 19 9 19 9 19 9 9
 
==== 22 note ====
10 9 9 10 9 9 10 9 9 10 9 9 10 9 9 10 9 9 10 9 9 9
 
==== 29 note ====
1 9 9 9 1 9 9 9 1 9 9 9 1 9 9 9 1 9 9 9 1 9 9 9 1 9 9 9 9


[[Category:Equal divisions of the octave|###]] <!-- 3-digit number -->
[[Category:Equal divisions of the octave|###]] <!-- 3-digit number -->