51edo: Difference between revisions

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m Added EDO info box, intervals table, and notation
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<b>51-EDO</b> divides the [[Octave|octave]] into 51 equal parts of 23.529 [[cent|cent]]s each, which is about the size of the [http://en.wikipedia.org/wiki/Pythagorean_comma Pythagorean comma] (even though this comma itself is mapped to a different interval). It tempers out [[250/243|250/243]] in the [[5-limit|5-limit]], [[225/224|225/224]] and [[2401/2400|2401/2400]] in the [[7-limit|7-limit]], and [[55/54|55/54]] and [[100/99|100/99]] in the [[11-limit|11-limit]]. It is the [[Optimal_patent_val|optimal patent val]] for [[Porcupine_rank_three_family|sonic]], the rank three temperament tempering out 250/243, 55/54 and 100/99, and also for the rank four temperament tempering out 55/54. It provides an alternative tuning to [[22edo|22edo]] for [[Porcupine_family|porcupine temperament]], with a nice fifth but a rather flat major third, and the optimal patent val for 7 and 11-limit [[Porcupine_family#Porky|porky temperament]], which is sonic plus 225/224.
{{Infobox ET
| Prime factorization = 3 × 17
| Step size = 23.52941¢
| Fifth = 30\51 ≈ 706¢
| Major 2nd = 9\51 ≈ 212¢
| Minor 2nd = 3\51 ≈ 71¢
| Augmented 1sn = 6\51 ≈ 141¢
}}
 
== Theory ==
 
{{primes in edo|51}}
'''51-EDO''' divides the [[Octave|octave]] into 51 equal parts of 23.529 [[cent|cent]]s each, which is about the size of the [http://en.wikipedia.org/wiki/Pythagorean_comma Pythagorean comma] (even though this comma itself is mapped to a different interval). It tempers out [[250/243|250/243]] in the [[5-limit|5-limit]], [[225/224|225/224]] and [[2401/2400|2401/2400]] in the [[7-limit|7-limit]], and [[55/54|55/54]] and [[100/99|100/99]] in the [[11-limit|11-limit]]. It is the [[Optimal_patent_val|optimal patent val]] for [[Porcupine_rank_three_family|sonic]], the rank three temperament tempering out 250/243, 55/54 and 100/99, and also for the rank four temperament tempering out 55/54. It provides an alternative tuning to [[22edo|22edo]] for [[Porcupine_family|porcupine temperament]], with a nice fifth but a rather flat major third, and the optimal patent val for 7 and 11-limit [[Porcupine_family#Porky|porky temperament]], which is sonic plus 225/224.
 
== Intervals ==
 
{| class="wikitable center-all right-2 left-3"
|-
! Degrees
! [[Cents|Cents]]
! colspan="3" | [[Ups and Downs Notation]]
|-
| 0
| 0.000
| Perfect 1sn
| P1
| D
|-
| 1
| 23.529
| Up 1sn
| ^1
| ^D
|-
| 2
| 47.059
| Downminor 2nd
| vm2
| vEb
|-
| 3
| 70.588
| Minor 2nd
| m2
| Eb
|-
| 4
| 94.118
| Upminor 2nd
| ^m2
| ^Eb
|-
| 5
| 117.647
| Downmid 2nd
| v~2
| ^^Eb
|-
| 6
| 141.176
| Mid 2nd
| ~2
| vvvE, ^^^Eb
|-
| 7
| 164.706
| Upmid 2nd
| ^~2
| vvE
|-
| 8
| 188.235
| Downmajor 2nd
| vM2
| vE
|-
| 9
| 211.765
| Major 2nd
| M2
| E
|-
| 10
| 235.294
| Upmajor 2nd
| ^M2
| ^E
|-
| 11
| 258.824
| Downminor 3rd
| vm3
| vF
|-
| 12
| 282.353
| Minor 3rd
| m3
| F
|-
| 13
| 305.882
| Upminor 3rd
| ^m3
| ^F
|-
| 14
| 329.412
| Downmid 3rd
| v~3
| ^^F
|-
| 15
| 352.941
| Mid 3rd
| ~3
| ^^^F, vvvF#
|-
| 16
| 376.471
| Upmid 3rd
| ^~3
| vvF#
|-
| 17
| 400.000
| Downmajor 3rd
| vM3
| vF#
|-
| 18
| 423.529
| Major 3rd
| M3
| F#
|-
| 19
| 447.509
| Upmajor 3rd
| ^M3
| ^F#
|-
| 20
| 470.588
| Down 4th
| v4
| vG
|-
| 21
| 494.118
| Perfect 4th
| P4
| G
|-
| 22
| 517.647
| Up 4th
| ^1
| ^G
|-
| 23
| 541.176
| Downdim 5th
| vd5
| vAb
|-
| 24
| 564.706
| Dim 5th
| d5
| Ab
|-
| 25
| 588.235
| Updim 5th
| ^d5
| ^Ab
|-
| 26
| 611.765
| Downaug 4th
| vA4
| vG#
|-
| 27
| 635.294
| Aug 4th
| A4
| G#
|-
| 28
| 658.824
| Upaug 4th
| ^A4
| ^G#
|-
| 29
| 682.353
| Down 5th
| v5
| vA
|-
| 30
| 705.882
| Perfect 5th
| P5
| A
|-
| 31
| 729.412
| Up 5th
| ^5
| ^A
|-
| 32
| 752.941
| Downminor 6th
| vm6
| vBb
|-
| 33
| 776.471
| Minor 6th
| m6
| Bb
|-
| 34
| 800.000
| Upminor 6th
| ^m6
| ^Bb
|-
| 35
| 823.529
| Downmid 6th
| v~6
| ^^Bb
|-
| 36
| 847.059
| Mid 6th
| ~6
| vvvB, ^^^Bb
|-
| 37
| 870.588
| Upmid 6th
| ^~6
| vvB
|-
| 38
| 894.118
| Downmajor 6th
| vM6
| vB
|-
| 39
| 917.647
| Major 6th
| M6
| B
|-
| 40
| 941.176
| Upmajor 6th
| ^M6
| ^B
|-
| 41
| 964.706
| Downminor 7th
| vm7
| vC
|-
| 42
| 988.235
| Minor 7th
| m7
| C
|-
| 43
| 1011.765
| Upminor 7th
| ^m7
| ^C
|-
| 44
| 1035.294
| Downmid 7th
| v~7
| ^^C
|-
| 45
| 1058.824
| Mid 7th
| ~7
| ^^^C, vvvC#
|-
| 46
| 1082.353
| Upmid 7th
| ^~7
| vvC#
|-
| 47
| 1105.882
| Downmajor 7th
| vM7
| vC#
|-
| 48
| 1129.412
| Major 7th
| M7
| C#
|-
| 49
| 1152.941
| Upmajor 7th
| ^M7
| ^C#
|-
| 50
| 1176.471
| Down 8ve
| v8
| vD
|-
| 51
| 1200.000
| Perfect 8ve
| P8
| D
|}
 
[[Category:51edo]]
[[Category:51edo]]
[[Category:Equal divisions of the octave]]
[[Category:Equal divisions of the octave]]
[[Category:theory]]
[[Category:theory]]