10edf: Difference between revisions

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{{Infobox ET}}
{{Infobox ET}}
'''[[EDF|Division of the just perfect fifth]] into 10 equal parts''' (10EDF) is related to [[17edo|17 edo]], but with the 3/2 rather than the 2/1 being just. The octave is about 6.6765 cents compressed and the step size is about 70.1955 cents. It is consistent to the [[7-odd-limit|7-integer-limit]], but not to the 8-integer-limit. In comparison, 17edo is only consistent up to the [[3-odd-limit|4-integer-limit]].
{{ED intro}}


Lookalikes: [[17edo]], [[27edt]]
== Theory ==
{{todo|improve synopsis|text=Make it longer, describe more about the tuning.}}
10edf is related to [[17edo]], but with the [[3/2|perfect fifth]] rather than the [[2/1|octave]] being just. The octave is compressed by about 6.68{{c}}, a small but significant deviation. 10edf is [[consistent]] to the [[integer limit|7-integer-limit]], but not to the 8-integer-limit. In comparison, 17edo is only consistent up to the 4-integer-limit. This makes 10edf a suitable tuning perhaps in the [[5-limit]], but overcompressed in any other limits, as well as the no-5 13-limit, where 17edo is best at.  


==Intervals==
=== Harmonics ===
{| class="wikitable"
{{Harmonics in equal|10|3|2|intervals=integer|columns=11}}
!degree
{{Harmonics in equal|10|3|2|intervals=integer|columns=12|start=12|collapsed=true|Approximation of harmonics in 10edf (continued)}}
!
 
![[1L 3s (fifth-equivalent)|Neptunian]] notation using 8\10edf
=== Subsets and supersets ===
![[Ed9/4|Neapolitan]] notation using 3/10edf
Since 10 factors into primes as {{nowrap| 2 × 5 }}, 10edf contains [[2edf]] and [[5edf]] as subset edfs.
 
== Intervals ==
{| class="wikitable center-all right-2"
|-
! #
! Cents
! [[1L 3s (fifth-equivalent)|Neptunian]] notation<br>using 8\10edf
! [[Ed9/4|Neapolitan]] notation<br>using 3/10edf
|-
|-
! colspan="2" |0
| 0
|C
| 0.0
|F
| C
| F
|-
|-
| 1
| 1
|70.1955
| 70.2
|^C, vDb
| ^C, vDb
|F^, Gb
| F^, Gb
|-
|-
|2
| 2
|140.391
| 140.4
|C#, Db
| C#, Db
|F#, Gd
| F#, Gd
|-
|-
|3
| 3
|210.5865
| 210.6
|vD
| vD
|G
| G
|-
|-
|4
| 4
|280.782
| 280.8
|D
| D
|G^, Ab
| G^, Ab
|-
|-
|5
| 5
|350.9775
| 351.0
|^D, vE
| ^D, vE
|G#, Ad
| G#, Ad
|-
|-
|6
| 6
|421.173
| 421.2
|E
| E
|A
| A
|-
|-
|7
| 7
|491.3685
| 491.4
|^E, vF
| ^E, vF
|A^, Hb
| A^, Hb
|-
|-
| 8
| 8
|561.564
| 561.6
|F
| F
|A#, Hd
| A#, Hd
|-
|-
|9
| 9
|631.7595
| 631.8
|^F, vC
| ^F, vC
|H
| H
|-
|-
|10
| 10
|701.955
| 702.0
|C
| C
|B
| B
|-
|-
|11
| 11
|772.1505
| 772.2
|^C, vDb
| ^C, vDb
|B^, Cb
| B^, Cb
|-
|-
|12
| 12
|842.346
| 842.3
|C#, Db
| C#, Db
|B#, Cd
| B#, Cd
|-
|-
|13
| 13
|912.5415
| 912.5
|vD
| vD
|C
| C
|-
|-
|14
| 14
|982.737
| 982.7
|D
| D
|C^, Db
| C^, Db
|-
|-
|15
| 15
|1052.9325
| 1052.9
|^D, vE
| ^D, vE
|C#, Dd
| C#, Dd
|-
|-
|16
| 16
|1123.128
| 1123.1
|E
| E
|D
| D
|-
|-
|17
| 17
|1193.3235
| 1193.3
|^E, vF
| ^E, vF
|D^, Eb
| D^, Eb
|-
|-
|18
| 18
|1263.519
| 1263.5
|F
| F
|D#, Eb
| D#, Eb
|-
|-
|19
| 19
|1333.7145
| 1333.7
|^F, vC
| ^F, vC
|E
| E
|-
|-
|20
| 20
|1403.91
| 1403.9
|C
| C
|F
| F
|}
|}


== Harmonics ==
== Music ==
{{Harmonics in equal
; [[Peter Kosmorsky]]
| steps = 10
* [https://www.archive.org/details/10Edf ''10 edf''] (archived 2011)
| num = 3
| denom = 2
}}
{{Harmonics in equal
| steps = 10
| num = 3
| denom = 2
| start = 12
| collapsed = 1
}}


==Music==
== See also ==
*http://www.archive.org/details/10Edf by [[Peter Kosmorsky]]
* [[17edo]] – relative edo
* [[27edt]] – relative edt
* [[44ed6]] – relative ed6


[[Category:Edf]]
[[Category:Listen]]
[[Category:Listen]]
[[Category:todo:expand]]
[[Category:todo:improve synopsis]]

Latest revision as of 15:29, 19 June 2025

← 9edf 10edf 11edf →
Prime factorization 2 × 5
Step size 70.1955 ¢ 
Octave 17\10edf (1193.32 ¢)
(semiconvergent)
Twelfth 27\10edf (1895.28 ¢)
(semiconvergent)
Consistency limit 7
Distinct consistency limit 6

10 equal divisions of the perfect fifth (abbreviated 10edf or 10ed3/2) is a nonoctave tuning system that divides the interval of 3/2 into 10 equal parts of about 70.2 ¢ each. Each step represents a frequency ratio of (3/2)1/10, or the 10th root of 3/2.

Theory

10edf is related to 17edo, but with the perfect fifth rather than the octave being just. The octave is compressed by about 6.68 ¢, a small but significant deviation. 10edf is consistent to the 7-integer-limit, but not to the 8-integer-limit. In comparison, 17edo is only consistent up to the 4-integer-limit. This makes 10edf a suitable tuning perhaps in the 5-limit, but overcompressed in any other limits, as well as the no-5 13-limit, where 17edo is best at.

Harmonics

Approximation of harmonics in 10edf
Harmonic 2 3 4 5 6 7 8 9 10 11 12
Error Absolute (¢) -6.7 -6.7 -13.4 +21.5 -13.4 +0.6 -20.0 -13.4 +14.8 -9.8 -20.0
Relative (%) -9.5 -9.5 -19.0 +30.6 -19.0 +0.8 -28.5 -19.0 +21.1 -13.9 -28.5
Steps
(reduced) 		17
(7) 		27
(7) 		34
(4) 		40
(0) 		44
(4) 		48
(8) 		51
(1) 		54
(4) 		57
(7) 		59
(9) 		61
(1)
Approximation of harmonics in 10edf
Harmonic 13 14 15 16 17 18 19 20 21 22 23 24
Error Absolute (¢) -18.2 -6.1 +14.8 -26.7 +8.7 -20.0 +26.8 +8.2 -6.1 -16.5 -23.2 -26.7
Relative (%) -25.9 -8.7 +21.1 -38.0 +12.4 -28.5 +38.1 +11.6 -8.7 -23.4 -33.1 -38.0
Steps
(reduced) 		63
(3) 		65
(5) 		67
(7) 		68
(8) 		70
(0) 		71
(1) 		73
(3) 		74
(4) 		75
(5) 		76
(6) 		77
(7) 		78
(8)

Subsets and supersets

Since 10 factors into primes as 2 × 5, 10edf contains 2edf and 5edf as subset edfs.

Intervals

# Cents Neptunian notation
using 8\10edf 		Neapolitan notation
using 3/10edf
0 0.0 C F
1 70.2 ^C, vDb F^, Gb
2 140.4 C#, Db F#, Gd
3 210.6 vD G
4 280.8 D G^, Ab
5 351.0 ^D, vE G#, Ad
6 421.2 E A
7 491.4 ^E, vF A^, Hb
8 561.6 F A#, Hd
9 631.8 ^F, vC H
10 702.0 C B
11 772.2 ^C, vDb B^, Cb
12 842.3 C#, Db B#, Cd
13 912.5 vD C
14 982.7 D C^, Db
15 1052.9 ^D, vE C#, Dd
16 1123.1 E D
17 1193.3 ^E, vF D^, Eb
18 1263.5 F D#, Eb
19 1333.7 ^F, vC E
20 1403.9 C F

Music

Peter Kosmorsky

See also

Retrieved from "https://en.xen.wiki/index.php?title=10edf&oldid=200023"