User:Overthink/41edo well temperament: Difference between revisions

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The chain of fifths: added a bit more info
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develop a bit; remove old table
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A highly notable tuning system is 41edo, which is [[distinctly consistent]] and [[consistent to distance]] 2 in the 9-odd-limit, consistent to the [[15-odd-limit]], and is overall great for its size in all prime limits up to 13. However, the accuracy of some intervals is debateable, so we will construct a well temperament in order to fix this issue.
A highly notable tuning system is [[41edo]], which is [[distinctly consistent]] and [[consistent to distance]] 2 in the 9-odd-limit, consistent to the [[15-odd-limit]], and is overall great for its size in all [[prime limit]]s up to [[13-limit|13]]. However, the accuracy of some intervals is debateable, so we will construct a well temperament in order to fix this issue.


== The chain of fifths ==
== The chain of fifths ==
Our well temperament will be mainly based on a chain of fifths, and we will target harmonics [[5/1|5]], [[7/1|7]], [[11/1|11]], and [[13/1|13]]. In 41edo, these prime harmonics are mapped as follows:
Our well temperament will be based on a chain of fifths, and we will target harmonics [[5/1|5]], [[7/1|7]], [[11/1|11]], and [[13/1|13]]. In 41edo, these prime harmonics are mapped as follows (corresponding to [[andromeda]] temperament if the fifths are all the same):


{| class="wikitable right-all center-1"
{| class="wikitable right-all center-1"
|-
|-
! Prime
! Prime
! Fifths<br>down
! Fifths down
! Fifths<br>up
|-
|-
| 5
| 5
| -8
| -8
| +33
|-
|-
| 7
| 7
| -14
| -14
| +27
|-
|-
| 11
| 11
| -18
| -18
| +23
|-
|-
| 13
| 13
| -21
| -21
| +20
|}
|}


Prime 5 is closest to the root on the circle of fifths; being only 8 fifth down due to 41edo tempering out the [[schisma]]. We build our well temperament down the chain of fifths to reach a more accurate prime 5, using slightly flat fifths of 701.738[[{{c}}]], or 1/9 schisma flat of just. We continue this chain of schismic fifths until we reach -10 fifths, or [[10/9]].
Prime 5 is closest to the root on the circle of fifths; being only 8 fifths down due to 41edo tempering out the [[schisma]]. We build our well temperament down the chain of fifths to reach a more accurate prime 5, using slightly flat fifths of 701.792[[{{c}}]], or 1/12 schisma flat of just. We continue this chain of schismic fifths down until we reach -12 fifths, or an exact [[81/80]]. We then stack down 12 [[parapyth]] fifths of 704.002{{c}} to obtain accurate approximations of harmonics 7, 11, and 13. Finally, the remaining fifths are all 1/12-schisma flat, giving a total of 29 schismic fifths and 12 parapyth fifths.
 
{| class="wikitable mw-collapsible center-1 right-all"
|+ style="font-size: 105% ;" | 41edo&nbsp;well&nbsp;temperament (Table incomplete)
|-
! Degree
! Fifths
! Cents
! Fifth below (¢)
! Fifth above (¢)
|-
| 0
| +0
| 0
| 701.738
| ?
|-
| 1
| +12
| ?
| ?
| ?
|-
| 2
| -17/+24
| ?
| ?
| ?
|-
| 3
| -5
| ?
| ?
| ?
|-
| 4
| +7
| ?
| ?
| ?
|-
| 5
| -22/+19
| ?
| ?
| ?
|-
| 6
| -10
| ?
| ?
| ?
|-
| 7
| +2
| ?
| ?
| ?
|-
| 8
| +14
| ?
| ?
| ?
|-
| 9
| -15
| ?
| ?
| ?
|-
| 10
| -3
| ?
| ?
| ?
|-
| 11
| +9
| ?
| ?
| ?
|-
| 12
| -20/+21
| ?
| ?
| ?
|-
| 13
| -8
| ?
| ?
| ?
|-
| 14
| +4
| ?
| ?
| ?
|-
| 15
| +16
| ?
| ?
| ?
|-
| 16
| -13
| ?
| ?
| ?
|-
| 17
| -1
| 498.262
| 701.738
| 701.738
|-
| 18
| ?
| ?
| ?
| ?
|-
| 19
| ?
| ?
| ?
| ?
|-
| 20
| ?
| ?
| ?
| ?
|-
| 21
| ?
| ?
| ?
| ?
|-
| 22
| ?
| ?
| ?
| ?
|-
| 23
| ?
| ?
| ?
| ?
|-
| 24
| +1
| ?
| ?
| ?
|-
| 25
| +13
| ?
| ?
| ?
|-
| 26
| ?
| ?
| ?
| ?
|-
| 27
| ?
| ?
| ?
| ?
|-
| 28
| ?
| ?
| ?
| ?
|-
| 29
| ?
| ?
| ?
| ?
|-
| 30
| ?
| ?
| ?
| ?
|-
| 31
| ?
| ?
| ?
| ?
|-
| 32
| ?
| ?
| ?
| ?
|-
| 33
| -14
| ?
| ?
| ?
|-
| 34
| -2
| ?
| ?
| ?
|-
| 35
| +10
| ?
| ?
| ?
|-
| 36
| ?
| ?
| ?
| ?
|-
| 37
| ?
| ?
| ?
| ?
|-
| 38
| ?
| ?
| ?
| ?
|-
| 39
| ?
| ?
| ?
| ?
|-
| 40
| ?
| ?
| ?
| ?
|-
| 41
| +0
| 1200
| ?
| ?
|}