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Hemififths: Difference between revisions

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<nowiki/>** Enharmonic equivalences: vvA1 and v\m2. Cents: {{nowrap| ^1 {{=}} 50¢ + 3.5c }} and {{nowrap| /1 {{=}} 50¢ − 8.5c }}
<nowiki/>** Enharmonic equivalences: vvA1 and v\m2. Cents: {{nowrap| ^1 {{=}} 50¢ + 3.5c }} and {{nowrap| /1 {{=}} 50¢ − 8.5c }}
=== As a detemperament of 17et ===
Hemififths is very naturally considered as a [[detemperament]] of the [[17edo|17 equal temperament]]. The table below shows a 58-tone detempered scale, with a generator range of -28 to +29. Each interval category of the 17 equal temperament is further divided into "sub", "plain" and "super" qualities, separated by -17 generator steps, which represents the syntonic~septimal comma; the "plain" type here consists of a [[7L 10s]] scale in 8|8 mode. Combining this division with the minor, neutral, and major qualities of the 17 equal temperament, hemififths gives us at least ''nine'' qualities for each diatonic category: subminor, minor, supraminor, subneutral, neutral, supraneutral, submajor, major, and supermajor.
Notice also the little comma between supraminor and subneutral, and between supraneutral and submajor. This interval spans 41 generator steps. 41edo tempers it out so that it conflates supraminor with subneutral and supraneutral with submajor whereas 58edo exaggerates it to the size of the syntonic~septimal comma. 99edo tunes it to one half the size of the syntonic~septimal comma, which can be seen as a good compromise.
{| class="wikitable center-all mw-collapsible mw-collapsed"
|-
! rowspan="2" | #
! rowspan="2" | Interval<br>category
! colspan="3" style="border-left: double;" | "Double-Sub"
! colspan="3" style="border-left: double;" | "Sub"
! colspan="3" style="border-left: double;" | "Plain"
! colspan="3" style="border-left: double;" | "Super"
! colspan="3" style="border-left: double;" | "Double-super"
|-
! style="border-left: double;" | Gen. || Cents* || Ratios
! style="border-left: double;" | Gen. || Cents* || Ratios
! style="border-left: double;" | Gen. || Cents* || Ratios
! style="border-left: double;" | Gen. || Cents* || Ratios
! style="border-left: double;" | Gen. || Cents* || Ratios
|-
| 0
| P1
| style="border-left: double;" |  ||  ||
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 0 || 0.0 || 1/1
| style="border-left: double;" | -17 || 25.9 || 64/63~81/80
| style="border-left: double;" |  ||  ||
|-
| 1
| m2
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 24 || 35.2 || 49/48~50/49
| style="border-left: double;" | 7 || 60.3 || 28/27
| style="border-left: double;" | -10 || 85.3 || 21/20
| style="border-left: double;" | -27 || 110.4 || 16/15
|-
| 2
| n2
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 14 || 120.5 || 14/13~15/14
| style="border-left: double;" | -3 || 145.6 || 12/11~13/12
| style="border-left: double;" | -20 || 170.7 || 11/10
| style="border-left: double;" |  ||  ||
|-
| 3
| M2
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 21 || 180.8 || 10/9
| style="border-left: double;" | 4 || 205.9 || 9/8
| style="border-left: double;" | -13 || 230.9 || 8/7
| style="border-left: double;" |  ||  ||
|-
| 4
| m3
| style="border-left: double;" | 28 || 241.1 || 15/13
| style="border-left: double;" | 11 || 266.1 || 7/6
| style="border-left: double;" | -6 || 291.2 || 13/11
| style="border-left: double;" | -23 || 316.3 || 6/5
| style="border-left: double;" |  ||  ||
|-
| 5
| n3
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 18 || 326.4 || 40/33
| style="border-left: double;" | 1 || 351.5 || 11/9~16/13
| style="border-left: double;" | -16 || 376.5 || 26/21
| style="border-left: double;" |  ||  ||
|-
| 6
| M3
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 25 || 386.7 || 5/4
| style="border-left: double;" | 8 || 411.7 || 14/11
| style="border-left: double;" | -9 || 436.8 || 9/7
| style="border-left: double;" | -26 || 461.9 || 13/10
|-
| 7
| P4
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 15 || 472.0 || 21/16
| style="border-left: double;" | -2 || 497.1 || 4/3
| style="border-left: double;" | -19 || 522.1 || 27/20
| style="border-left: double;" |  ||  ||
|-
| 8
| sA4, d5
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 22 || 532.3 || 15/11
| style="border-left: double;" | 5 || 557.3 || 11/8~18/13
| style="border-left: double;" | -12 || 582.4 || 7/5
| style="border-left: double;" |  ||  ||
|-
| 9
| sd5, A4
| style="border-left: double;" | 29 || 592.5 || 45/32
| style="border-left: double;" | 12 || 617.6 || 10/7
| style="border-left: double;" | -5 || 642.7 || 13/9~16/11
| style="border-left: double;" | -22 || 667.7 || 22/15
| style="border-left: double;" |  ||  ||
|-
| 10
| P5
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 19 || 677.9 || 40/27
| style="border-left: double;" | 2 || 702.9 || 3/2
| style="border-left: double;" | -15 || 728.0 || 32/21
| style="border-left: double;" |  ||  ||
|-
| 11
| m6
| style="border-left: double;" | 26 || 738.1 || 20/13
| style="border-left: double;" | 9 || 763.2 || 14/9
| style="border-left: double;" | -8 || 788.3 || 11/7
| style="border-left: double;" | -25 || 813.3 || 8/5
| style="border-left: double;" |  ||  ||
|-
| 12
| n6
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 16 || 823.5 || 21/13
| style="border-left: double;" | -1 || 848.5 || 13/8~18/11
| style="border-left: double;" | -18 || 873.6 || 33/20
| style="border-left: double;" |  ||  ||
|-
| 13
| M6
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 23 || 883.7 || 5/3
| style="border-left: double;" | 6 || 908.8 || 22/13
| style="border-left: double;" | -11 || 933.9 || 12/7
| style="border-left: double;" | -28 || 958.9 || 26/15
|-
| 14
| m7
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 13 || 969.1 || 7/4
| style="border-left: double;" | -4 || 994.1 || 16/9
| style="border-left: double;" | -21 || 1019.2 || 9/5
| style="border-left: double;" |  ||  ||
|-
| 15
| n7
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 20 || 1029.3 || 20/11
| style="border-left: double;" | 3 || 1054.4 || 11/6~24/13
| style="border-left: double;" | -14 || 1079.5 || 13/7~28/15
| style="border-left: double;" |  ||  ||
|-
| 16
| M7
| style="border-left: double;" | 27 || 1089.6 || 15/8
| style="border-left: double;" | 10 || 1114.7 || 21/11
| style="border-left: double;" | -7 || 1139.7 || 27/14
| style="border-left: double;" | -24 || 1164.8 || 39/20~49/25
| style="border-left: double;" |  ||  ||
|-
| 17
| P8
| style="border-left: double;" |  ||  ||
| style="border-left: double;" | 17 || 1174.9 || 55/28~63/32
| style="border-left: double;" | 0 || 1200.0 || 2/1
| style="border-left: double;" |  ||  ||
| style="border-left: double;" |  ||  ||
|}


== Notation ==
== Notation ==
Retrieved from "https://en.xen.wiki/w/Hemififths"