72edo: Difference between revisions
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{{interwiki | |||
| de = 72-EDO | |||
| en = 72edo | |||
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{{Infobox ET}} | |||
{{Wikipedia|72 equal temperament}} | |||
{{ED intro}} | |||
Each step of 72edo is called a ''[[morion]]'' (plural ''moria)''. This produces a twelfth-tone tuning, with the whole tone measuring 200{{c}}, the same as in [[12edo]]. 72edo is also a superset of [[24edo]], a common and standard tuning of [[Arabic, Turkish, Persian music|Arabic music]], and has itself been used to tune Turkish music. | |||
Composers that used | Composers that used 72edo include [[Ivan Wyschnegradsky]], [[Julián Carrillo]] (who is better associated with [[96edo]]), [[Georg Friedrich Haas]], [[Ezra Sims]], [[Rick Tagawa]], [[James Tenney]], and the jazz musician [[Joe Maneri]]. | ||
== Theory == | |||
72edo approximates [[11-limit]] [[just intonation]] exceptionally well. It is the second edo (after [[58edo|58]]) to be [[consistent]] in the [[17-odd-limit]], and the second edo (also after 58) to be [[consistency|distinctly consistent]] in the [[11-odd-limit]], but it is the first edo to be [[consistency|consistent to distance 2]] in the 11-odd-limit, meaning every interval in the 11-odd-limit is approximated with less than 25% [[relative interval error|relative error]] (about 4 cents). It also has pretty good accuracy for the [[19-limit]], being almost consistent to the entire [[21-odd-limit]] with the only inconsistency occurring at [[19/13]] and its [[octave complement]]. It is the ninth [[zeta integral edo]]. | |||
72 | The octave, fifth and fourth are the same size as they would be in 12edo, 72, 42 and 30 steps respectively, but the classic major third ([[5/4]]) measures 23 steps, not 24, and other [[5-limit]] major intervals are one step flat of 12edo while minor ones are one step sharp. The septimal minor seventh ([[7/4]]) is 58 steps, while the undecimal semiaugmented fourth ([[11/8]]) is 33. | ||
The [[octave reduction|octave reduced]] [[13/1|13th harmonic]] is mapped on 50\72, an interval inherited from [[36edo]] (25\36) that is a very close approximation to [[acoustic phi]], and the [[17/1|17th]] and [[19/1|19th harmonics]] come from 12edo. | |||
72edo is the smallest multiple of 12edo that (just barely) has another diatonic fifth, 43\72, an extremely hard diatonic fifth suitable for a 5edo [[circulating temperament]]. | |||
{| class="wikitable" | === Prime harmonics === | ||
{{Harmonics in equal|72|columns=11}} | |||
{{Harmonics in equal|72|columns=11|start=12|collapsed=true|title=Approximation of prime harmonics in 72edo (continued)}} | |||
=== As a tuning of other temperaments === | |||
72et is the only 11-limit regular temperament which treats harmonics 24 to 28 as being equidistant in pitch, splits [[25/24]] into two equal [[49/48]][[~]][[50/49]]'s, and splits [[28/27]] into two equal [[55/54]]~[[56/55]]'s (144edo is enfactored in the 11-limit with 72edo, so it is already covered here). It is also an excellent tuning for [[miracle]] temperament, especially the 11-limit version, and the related rank-3 temperament [[prodigy]], and is a good tuning for other temperaments and scales, including [[wizard]], [[harry]], [[catakleismic]], [[compton]], [[unidec]] and [[tritikleismic]]. | |||
=== Subsets and supersets === | |||
Since 72 factors into primes as {{nowrap| 2<sup>3</sup> × 3<sup>2</sup> }}, 72edo has subset edos {{EDOs| 2, 3, 4, 6, 8, 9, 12, 18, 24, and 36 }}. [[144edo]], which doubles it, provides a possible correction to its approximate harmonic 13, though unlike 72 it is not consistent to the [[13-odd-limit]]. | |||
== Intervals == | |||
{| class="wikitable center-1 right-2" | |||
|- | |||
! # | |||
! Cents | |||
! Approximate ratios<ref group="note">As a 19-limit temperament, inconsistent intervals in ''italic''. For a table of intervals by prime limit, see [[Table of 72edo intervals]].</ref> | |||
! [[Kite's ups and downs notation|Ups and downs notation]] | |||
|- | |||
| 0 | |||
| 0.0 | |||
| [[1/1]] | |||
| {{UDnote|step=0}} | |||
|- | |||
| 1 | |||
| 16.7 | |||
| [[81/80]], [[91/90]], [[99/98]], [[100/99]], [[105/104]] | |||
| {{UDnote|step=1}} | |||
|- | |||
| 2 | |||
| 33.3 | |||
| [[45/44]], [[49/48]], [[50/49]], [[55/54]], [[64/63]] | |||
| {{UDnote|step=2}} | |||
|- | |||
| 3 | |||
| 50.0 | |||
| [[33/32]], [[36/35]], [[40/39]] | |||
| {{UDnote|step=3}} | |||
|- | |||
| 4 | |||
| 66.7 | |||
| [[25/24]], [[26/25]], [[27/26]], [[28/27]] | |||
| {{UDnote|step=4}} | |||
|- | |||
| 5 | |||
| 83.3 | |||
| [[20/19]], [[21/20]], [[22/21]] | |||
| {{UDnote|step=5}} | |||
|- | |||
| 6 | |||
| 100.0 | |||
| [[17/16]], [[18/17]], [[19/18]] | |||
| {{UDnote|step=6}} | |||
|- | |||
| 7 | |||
| 116.7 | |||
| [[15/14]], [[16/15]] | |||
| {{UDnote|step=7}} | |||
|- | |||
| 8 | |||
| 133.3 | |||
| [[13/12]], [[14/13]], [[27/25]] | |||
| {{UDnote|step=8}} | |||
|- | |||
| 9 | |||
| 150.0 | |||
| [[12/11]] | |||
| {{UDnote|step=9}} | |||
|- | |||
| 10 | |||
| 166.7 | |||
| [[11/10]], [[21/19]] | |||
| {{UDnote|step=10}} | |||
|- | |||
| 11 | |||
| 183.3 | |||
| [[10/9]] | |||
| {{UDnote|step=11}} | |||
|- | |||
| 12 | |||
| 200.0 | |||
| [[9/8]], [[19/17]] | |||
| {{UDnote|step=12}} | |||
|- | |||
| 13 | |||
| 216.7 | |||
| [[17/15]], [[25/22]] | |||
| {{UDnote|step=13}} | |||
|- | |||
| 14 | |||
| 233.3 | |||
| [[8/7]] | |||
| {{UDnote|step=14}} | |||
|- | |||
| 15 | |||
| 250.0 | |||
| [[15/13]], [[22/19]] | |||
| {{UDnote|step=15}} | |||
|- | |||
| 16 | |||
| 266.7 | |||
| [[7/6]] | |||
| {{UDnote|step=16}} | |||
|- | |||
| 17 | |||
| 283.3 | |||
| [[13/11]], [[20/17]] | |||
| {{UDnote|step=17}} | |||
|- | |||
| 18 | |||
| 300.0 | |||
| [[19/16]], [[25/21]], [[32/27]] | |||
| {{UDnote|step=18}} | |||
|- | |||
| 19 | |||
| 316.7 | |||
| [[6/5]] | |||
| {{UDnote|step=19}} | |||
|- | |||
| 20 | |||
| 333.3 | |||
| [[17/14]], ''[[39/32]]'', [[40/33]] | |||
| {{UDnote|step=20}} | |||
|- | |||
| 21 | |||
| 350.0 | |||
| [[11/9]], [[27/22]] | |||
| {{UDnote|step=21}} | |||
|- | |||
| 22 | |||
| 366.7 | |||
| [[16/13]], [[21/17]], [[26/21]] | |||
| {{UDnote|step=22}} | |||
|- | |||
| 23 | |||
| 383.3 | |||
| [[5/4]] | |||
| {{UDnote|step=23}} | |||
|- | |||
| 24 | |||
| 400.0 | |||
| [[24/19]] | |||
| {{UDnote|step=24}} | |||
|- | |||
| 25 | |||
| 416.7 | |||
| [[14/11]], [[19/15]] | |||
| {{UDnote|step=25}} | |||
|- | |||
| 26 | |||
| 433.3 | |||
| [[9/7]] | |||
| {{UDnote|step=26}} | |||
|- | |||
| 27 | |||
| 450.0 | |||
| [[13/10]], [[22/17]] | |||
| {{UDnote|step=27}} | |||
|- | |||
| 28 | |||
| 466.7 | |||
| [[17/13]], [[21/16]] | |||
| {{UDnote|step=28}} | |||
|- | |||
| 29 | |||
| 483.3 | |||
| [[33/25]] | |||
| {{UDnote|step=29}} | |||
|- | |||
| 30 | |||
| 500.0 | |||
| [[4/3]] | |||
| {{UDnote|step=30}} | |||
|- | |||
| 31 | |||
| 516.7 | |||
| [[27/20]] | |||
| {{UDnote|step=31}} | |||
|- | |||
| 32 | |||
| 533.3 | |||
| [[15/11]], [[19/14]], ''[[26/19]]'' | |||
| {{UDnote|step=32}} | |||
|- | |||
| 33 | |||
| 550.0 | |||
| [[11/8]] | |||
| {{UDnote|step=33}} | |||
|- | |||
| 34 | |||
| 566.7 | |||
| [[18/13]], [[25/18]] | |||
| {{UDnote|step=34}} | |||
|- | |||
| 35 | |||
| 583.3 | |||
| [[7/5]] | |||
| {{UDnote|step=35}} | |||
|- | |||
| 36 | |||
| 600.0 | |||
| [[17/12]], [[24/17]] | |||
| {{UDnote|step=36}} | |||
|- | |||
| 37 | |||
| 616.7 | |||
| [[10/7]] | |||
| {{UDnote|step=37}} | |||
|- | |||
| 38 | |||
| 633.3 | |||
| [[13/9]], [[36/25]] | |||
| {{UDnote|step=38}} | |||
|- | |||
| 39 | |||
| 650.0 | |||
| [[16/11]] | |||
| {{UDnote|step=39}} | |||
|- | |||
| 40 | |||
| 666.7 | |||
| ''[[19/13]]'', [[22/15]], [[28/19]] | |||
| {{UDnote|step=40}} | |||
|- | |||
| 41 | |||
| 683.3 | |||
| [[40/27]] | |||
| {{UDnote|step=41}} | |||
|- | |||
| 42 | |||
| 700.0 | |||
| [[3/2]] | |||
| {{UDnote|step=42}} | |||
|- | |||
| 43 | |||
| 716.7 | |||
| [[50/33]] | |||
| {{UDnote|step=43}} | |||
|- | |||
| 44 | |||
| 733.3 | |||
| [[26/17]], [[32/21]] | |||
| {{UDnote|step=44}} | |||
|- | |||
| 45 | |||
| 750.0 | |||
| [[17/11]], [[20/13]] | |||
| {{UDnote|step=45}} | |||
|- | |||
| 46 | |||
| 766.7 | |||
| [[14/9]] | |||
| {{UDnote|step=46}} | |||
|- | |||
| 47 | |||
| 783.3 | |||
| [[11/7]], [[30/19]] | |||
| {{UDnote|step=47}} | |||
|- | |||
| 48 | |||
| 800.0 | |||
| [[19/12]] | |||
| {{UDnote|step=48}} | |||
|- | |||
| 49 | |||
| 816.7 | |||
| [[8/5]] | |||
| {{UDnote|step=49}} | |||
|- | |||
| 50 | |||
| 833.3 | |||
| [[13/8]], [[21/13]], [[34/21]] | |||
| {{UDnote|step=50}} | |||
|- | |||
| 51 | |||
| 850.0 | |||
| [[18/11]], [[44/27]] | |||
| {{UDnote|step=51}} | |||
|- | |||
| 52 | |||
| 866.7 | |||
| [[28/17]], [[33/20]], ''[[64/39]]'' | |||
| {{UDnote|step=52}} | |||
|- | |||
| 53 | |||
| 883.3 | |||
| [[5/3]] | |||
| {{UDnote|step=53}} | |||
|- | |||
| 54 | |||
| 900.0 | |||
| [[27/16]], [[32/19]], [[42/25]] | |||
| {{UDnote|step=54}} | |||
|- | |||
| 55 | |||
| 916.7 | |||
| [[17/10]], [[22/13]] | |||
| {{UDnote|step=55}} | |||
|- | |||
| 56 | |||
| 933.3 | |||
| [[12/7]] | |||
| {{UDnote|step=56}} | |||
|- | |||
| 57 | |||
| 950.0 | |||
| [[19/11]], [[26/15]] | |||
| {{UDnote|step=57}} | |||
|- | |- | ||
| 58 | |||
| 966.7 | |||
| [[7/4]] | |||
| {{UDnote|step=58}} | |||
|- | |- | ||
| | | | 59 | ||
| | | 983.3 | ||
| [[30/17]], [[44/25]] | |||
{| | | {{UDnote|step=59}} | ||
|- | |- | ||
| 60 | |||
| 1000.0 | |||
| [[16/9]], [[34/19]] | |||
| {{UDnote|step=60}} | |||
|- | |- | ||
| | | 61 | ||
| 1016.7 | |||
| [[9/5]] | |||
| {{UDnote|step=61}} | |||
| | |||
{| | |||
|- | |- | ||
| 62 | |||
| 1033.3 | |||
| [[20/11]], [[38/21]] | |||
| {{UDnote|step=62}} | |||
|- | |- | ||
| | | 63 | ||
| 1050.0 | |||
| [[11/6]] | |||
| {{UDnote|step=63}} | |||
| | |||
| | |||
{| | |||
|- | |- | ||
| | | 64 | ||
| | | 1066.7 | ||
| | | [[13/7]], [[24/13]], [[50/27]] | ||
| {{UDnote|step=64}} | |||
| | | |||
|- | |- | ||
| | . | | 65 | ||
| 1083.3 | |||
| [[15/8]], [[28/15]] | |||
| {{UDnote|step=65}} | |||
| | |||
| | | |||
|- | |- | ||
| | . | | 66 | ||
| 1100.0 | |||
| | | [[17/9]], [[32/17]], [[36/19]] | ||
| {{UDnote|step=66}} | |||
| | | |||
|- | |- | ||
| | | 67 | ||
| 1116.7 | |||
| [[19/10]], [[21/11]], [[40/21]] | |||
| {{UDnote|step=67}} | |||
| | |||
| | |||
| | | |||
|- | |- | ||
| | | 68 | ||
| 1133.3 | |||
| | | [[25/13]], [[27/14]], [[48/25]], [[52/27]] | ||
| {{UDnote|step=68}} | |||
| | |||
| | | |||
|- | |- | ||
| | | | 69 | ||
| 1150.0 | |||
| [[35/18]], [[39/20]], [[64/33]] | |||
| {{UDnote|step=69}} | |||
| | |||
| | | |||
|- | |- | ||
| | | 70 | ||
| 1166.7 | |||
| | | [[49/25]], [[55/28]], [[63/32]], [[88/45]], [[96/49]] | ||
| {{UDnote|step=70}} | |||
| | |||
| | | |||
|- | |- | ||
| | | 71 | ||
| 1183.3 | |||
| [[99/50]], [[160/81]], [[180/91]], [[196/99]], [[208/105]] | |||
| {{UDnote|step=71}} | |||
| | |||
| | |||
| | | |||
|- | |- | ||
| | | 72 | ||
| 1200.0 | |||
| [[2/1]] | |||
| {{UDnote|step=72}} | |||
| | |||
| | |||
| | | |||
|} | |} | ||
<references group="note" /> | |||
= | === Proposed interval names and solfèges === | ||
{| class="wikitable center-all right-2 left-4 left-7 mw-collapsible mw-collapsed" | |||
{| class="wikitable" | |+ style="font-size: 105%; white-space: nowrap;" | Table of proposed interval names and solfèges | ||
|- | |- | ||
! # | |||
! Cents | |||
! colspan="3" | [[Kite's ups and downs notation|Ups and downs notation]] | |||
! colspan="3" | [[SKULO interval names|SKULO interval names and notation]] | |||
! (K, S, U) | |||
|- | |- | ||
| 0 | |||
| | | 0.0 | ||
| | | | P1 | ||
| | | perfect unison | ||
| D | |||
| | | P1 | ||
| perfect unison | |||
| D | |||
| D | |||
|- | |- | ||
| 1 | |||
| 16.7 | |||
| | | | ^1 | ||
| | | up unison | ||
| | | ^D | ||
| | | K1, L1 | ||
| comma-wide unison, large unison | |||
| KD, LD | |||
| KD | |||
|- | |- | ||
| 2 | |||
| 33.3 | |||
| | | | ^^ | ||
| dup unison | |||
| | | ^^D | ||
| | | S1, O1 | ||
| super unison, on unison | |||
| SD, OD | |||
| SD | |||
|- | |- | ||
| 3 | |||
| 50.0 | |||
| ^<sup>3</sup>1, v<sup>3</sup>m2 | |||
| trup unison, trudminor 2nd | |||
| | | ^<sup>3</sup>D, v<sup>3</sup>Eb | ||
| U1, H1, hm2 | |||
| uber unison, hyper unison, hypominor 2nd | |||
| | | UD, HD, uEb | ||
| UD, uEb | |||
|- | |- | ||
| 4 | |||
| 66.7 | |||
| | | | vvm2 | ||
| | | dudminor 2nd | ||
| | | vvEb | ||
| | | kkA1, sm2 | ||
| classic aug unison, subminor 2nd | |||
| kkD#, sEb | |||
| sD#, (kkD#), sEb | |||
|- | |- | ||
| 5 | |||
| 83.3 | |||
| | | | vm2 | ||
| | | downminor 2nd | ||
| | | vEb | ||
| | | kA1, lm2 | ||
| comma-narrow aug unison, little minor 2nd | |||
| kD#, lEb | |||
| kD#, kEb | |||
|- | |- | ||
| 6 | |||
| 100.0 | |||
| | | | m2 | ||
| | | minor 2nd | ||
| Eb | |||
| | | m2 | ||
| minor 2nd | |||
| Eb | |||
| Eb | |||
|- | |- | ||
| 7 | |||
| 116.7 | |||
| | | | ^m2 | ||
| upminor 2nd | |||
| | | ^Eb | ||
| | | Km2 | ||
| classic minor 2nd | |||
| KEb | |||
| KEb | |||
|- | |- | ||
| 8 | |||
| 133.3 | |||
| | | ^^m2, v~2 | ||
| dupminor 2nd, downmid 2nd | |||
| | | ^^Eb | ||
| | | Om2 | ||
| on minor 2nd | |||
| OEb | |||
| SEb | |||
|- | |- | ||
| 9 | |||
| 150.0 | |||
| ~2 | |||
| mid 2nd | |||
| v<sup>3</sup>E | |||
| | | N2 | ||
| neutral 2nd | |||
| UEb/uE | |||
| UEb/uE | |||
|- | |- | ||
| 10 | |||
| 166.7 | |||
| | | | ^~2, vvM2 | ||
| | | upmid 2nd, dudmajor 2nd | ||
| | | vvE | ||
| | | oM2 | ||
| off major 2nd | |||
| oE | |||
| sE | |||
|- | |- | ||
| 11 | |||
| 183.3 | |||
| | | | vM2 | ||
| | | downmajor 2nd | ||
| | | vE | ||
| | | kM2 | ||
| classic/comma-narrow major 2nd | |||
| kE | |||
| kE | |||
|- | |- | ||
| 12 | |||
| 200.0 | |||
| | | | M2 | ||
| | | major 2nd | ||
| E | |||
| | | M2 | ||
| major 2nd | |||
| E | |||
| E | |||
|- | |- | ||
| 13 | |||
| 216.7 | |||
| | | | ^M2 | ||
| upmajor 2nd | |||
| | | ^E | ||
| | | LM2 | ||
| large major 2nd | |||
| LE | |||
| KE | |||
|- | |- | ||
| 14 | |||
| 233.3 | |||
| | | | ^^M2 | ||
| dupmajor 2nd | |||
| | | ^^E | ||
| | | SM2 | ||
| supermajor 2nd | |||
| SE | |||
| SE | |||
|- | |- | ||
| 15 | |||
| 250.0 | |||
| ^<sup>3</sup>M2, <br>v<sup>3</sup>m3 | |||
| trupmajor 2nd,<br>trudminor 3rd | |||
| | | ^<sup>3</sup>E, <br>v<sup>3</sup>F | ||
| HM2, hm3 | |||
| hypermajor 2nd, hypominor 3rd | |||
| | | HE, hF | ||
| UE, uF | |||
|- | |- | ||
| 16 | |||
| 266.7 | |||
| | | | vvm3 | ||
| | | dudminor 3rd | ||
| | | vvF | ||
| | | sm3 | ||
| subminor 3rd | |||
| sF | |||
| sF | |||
|- | |- | ||
| 17 | |||
| 283.3 | |||
| | | | vm3 | ||
| | | downminor 3rd | ||
| | | vF | ||
| | | lm3 | ||
| little minor 3rd | |||
| lF | |||
| kF | |||
|- | |- | ||
| 18 | |||
| 300.0 | |||
| | | | m3 | ||
| | | minor 3rd | ||
| F | |||
| | | m3 | ||
| minor 3rd | |||
| F | |||
| F | |||
|- | |- | ||
| 19 | |||
| 316.7 | |||
| | | | ^m3 | ||
| upminor 3rd | |||
| | | ^F | ||
| | | Km3 | ||
| classic minor 3rd | |||
| KF | |||
| KF | |||
|- | |- | ||
| 20 | |||
| 333.3 | |||
| | | ^^m3, v~3 | ||
| dupminor 3rd, downmid 3rd | |||
| | | ^^F | ||
| | | Om3 | ||
| on minor third | |||
| OF | |||
| SF | |||
|- | |- | ||
| 21 | |||
| 350.0 | |||
| ~3 | |||
| mid 3rd | |||
| ^<sup>3</sup>F | |||
| | | N3 | ||
| neutral 3rd | |||
| UF/uF# | |||
| UF/uF# | |||
|- | |- | ||
| 22 | |||
| 366.7 | |||
| | | | ^~3, vvM3 | ||
| | | upmid 3rd, dudmajor 3rd | ||
| | | vvF# | ||
| | | oM3 | ||
| off major 3rd | |||
| oF# | |||
| sF# | |||
|- | |- | ||
| 23 | |||
| 383.3 | |||
| | | | vM3 | ||
| | | downmajor 3rd | ||
| | | vF# | ||
| | | kM3 | ||
| classic major 3rd | |||
| kF# | |||
| kF# | |||
|- | |- | ||
| 24 | |||
| 400.0 | |||
| | | | M3 | ||
| | | major 3rd | ||
| F# | |||
| | | M3 | ||
| major 3rd | |||
| F# | |||
| F# | |||
|- | |- | ||
| 25 | |||
| 416.7 | |||
| | | | ^M3 | ||
| upmajor 3rd | |||
| | | ^F# | ||
| | | LM3 | ||
| large major 3rd | |||
| LF# | |||
| KF# | |||
|- | |- | ||
| 26 | |||
| 433.3 | |||
| | | | ^^M3 | ||
| dupmajor 3rd | |||
| | | ^^F# | ||
| | | SM3 | ||
| supermajor 3rd | |||
| SF# | |||
| SF# | |||
|- | |- | ||
| 27 | |||
| 450.0 | |||
| ^<sup>3</sup>M3, v<sup>3</sup>4 | |||
| trupmajor 3rd, trud 4th | |||
| | | ^<sup>3</sup>F#, v<sup>3</sup>G | ||
| HM3, h4 | |||
| hypermajor 3rd, hypo 4th | |||
| | | HF#, hG | ||
| UF#, uG | |||
|- | |- | ||
| 28 | |||
| 466.7 | |||
| | | | vv4 | ||
| | | dud 4th | ||
| | | vvG | ||
| | | s4 | ||
| sub 4th | |||
| sG | |||
| sG | |||
|- | |- | ||
| 29 | |||
| 483.3 | |||
| | | | v4 | ||
| | | down 4th | ||
| | | vG | ||
| | | l4 | ||
| little 4th | |||
| lG | |||
| kG | |||
|- | |- | ||
| 30 | |||
| 500.0 | |||
| | | | P4 | ||
| | | perfect 4th | ||
| G | |||
| | | P4 | ||
| perfect 4th | |||
| G | |||
| G | |||
|- | |- | ||
| 31 | |||
| 516.7 | |||
| | | | ^4 | ||
| | | up 4th | ||
| | | ^G | ||
| | | K4 | ||
| comma-wide 4th | |||
| KG | |||
| KG | |||
|- | |- | ||
| 32 | |||
| 533.3 | |||
| | | | ^^4, v~4 | ||
| dup 4th, downmid 4th | |||
| | | ^^G | ||
| | | O4 | ||
| on 4th | |||
| OG | |||
| SG | |||
|- | |- | ||
| 33 | |||
| 550.0 | |||
| | | | ~4 | ||
| mid 4th | |||
| | | ^<sup>3</sup>G | ||
| | | U4/N4 | ||
| uber 4th / neutral 4th | |||
| UG | |||
| UG | |||
|- | |- | ||
| 34 | |||
| 566.7 | |||
| | | | ^~4, vvA4 | ||
| | | upmid 4th, dudaug 4th | ||
| | | vvG# | ||
| | | kkA4, sd5 | ||
| classic aug 4th, sub dim 5th | |||
| kkG#, sAb | |||
| SG#, (kkG#), sAb | |||
|- | |- | ||
| 35 | |||
| 583.3 | |||
| | | | vA4, vd5 | ||
| | | downaug 4th, <br>downdim 5th | ||
| | | vG#, vAb | ||
| | | kA4, ld5 | ||
| comma-narrow aug 4th, little dim 5th | |||
| kG#, lAb | |||
| kG#, kAb | |||
|- | |- | ||
| 36 | |||
| 600.0 | |||
| | | | A4, d5 | ||
| | | aug 4th, dim 5th | ||
| G#, Ab | |||
| | | A4, d5 | ||
| aug 4th, dim 5th | |||
| G#, Ab | |||
| G#, Ab | |||
|- | |- | ||
| 37 | |||
| 616.7 | |||
| ^A4, ^d5 | |||
| upaug 4th, updim 5th | |||
| ^G#, ^Ab | |||
| | | LA4, Kd5 | ||
| large aug 4th, comma-wide dim 5th | |||
| LG#, KAb | |||
| KG#, KAb | |||
|- | |- | ||
| 38 | |||
| 633.3 | |||
| | | | v~5, ^^d5 | ||
| downmid 5th, <br>dupdim 5th | |||
| | | ^^Ab | ||
| | | SA4, KKd5 | ||
| super aug 4th, classic dim 5th | |||
| SG#, KKAb | |||
| SG#, SAb, (KKAb) | |||
|- | |- | ||
| 39 | |||
| 650.0 | |||
| | | | ~5 | ||
| mid 5th | |||
| | | v<sup>3</sup>A | ||
| | | u5/N5 | ||
| unter 5th / neutral 5th | |||
| uA | |||
| uA | |||
|- | |- | ||
| 40 | |||
| 666.7 | |||
| | | | vv5, ^~5 | ||
| | | dud 5th, upmid 5th | ||
| | | vvA | ||
| | | o5 | ||
| off 5th | |||
| oA | |||
| sA | |||
|- | |- | ||
| 41 | |||
| 683.3 | |||
| | | | v5 | ||
| | | down 5th | ||
| | | vA | ||
| | | k5 | ||
| comma-narrow 5th | |||
| kA | |||
| kA | |||
|- | |- | ||
| 42 | |||
| 700.0 | |||
| | | | P5 | ||
| | | perfect 5th | ||
| A | |||
| | | P5 | ||
| perfect 5th | |||
| A | |||
| A | |||
|- | |- | ||
| 43 | |||
| 716.7 | |||
| | | | ^5 | ||
| up 5th | |||
| | | ^A | ||
| | | L5 | ||
| large fifth | |||
| LA | |||
| KA | |||
|- | |- | ||
| 44 | |||
| 733.3 | |||
| | | | ^^5 | ||
| dup 5th | |||
| | | ^^A | ||
| | | S5 | ||
| super fifth | |||
| SA | |||
| SA | |||
|- | |- | ||
| 45 | |||
| 750.0 | |||
| ^<sup>3</sup>5, v<sup>3</sup>m6 | |||
| trup 5th, trudminor 6th | |||
| | | ^<sup>3</sup>A, v<sup>3</sup>Bb | ||
| H5, hm6 | |||
| hyper fifth, hypominor 6th | |||
| | | HA, hBb | ||
| UA, uBb | |||
|- | |- | ||
| 46 | |||
| 766.7 | |||
| | | | vvm6 | ||
| | | dudminor 6th | ||
| | | vvBb | ||
| | | sm6 | ||
| superminor 6th | |||
| sBb | |||
| sBb | |||
|- | |- | ||
| 47 | |||
| 783.3 | |||
| | | | vm6 | ||
| | | downminor 6th | ||
| | | vBb | ||
| | | lm6 | ||
| little minor 6th | |||
| lBb | |||
| kBb | |||
|- | |- | ||
| 48 | |||
| 800.0 | |||
| | | | m6 | ||
| | | minor 6th | ||
| Bb | |||
| | | m6 | ||
| minor 6th | |||
| Bb | |||
| Bb | |||
|- | |- | ||
| 49 | |||
| 816.7 | |||
| | | | ^m6 | ||
| upminor 6th | |||
| | | ^Bb | ||
| | | Km6 | ||
| classic minor 6th | |||
| kBb | |||
| kBb | |||
|- | |- | ||
| 50 | |||
| 833.3 | |||
| | | ^^m6, v~6 | ||
| dupminor 6th, downmid 6th | |||
| | | ^^Bb | ||
| | | Om6 | ||
| on minor 6th | |||
| oBb | |||
| sBb | |||
|- | |- | ||
| 51 | |||
| 850.0 | |||
| ~6 | |||
| mid 6th | |||
| v<sup>3</sup>B | |||
| | | N6 | ||
| neutral 6th | |||
| UBb, uB | |||
| UBb, uB | |||
|- | |- | ||
| 52 | |||
| 866.7 | |||
| | | | ^~6, vvM6 | ||
| | | upmid 6th, dudmajor 6th | ||
| | | vvB | ||
| | | oM6 | ||
| off major 6th | |||
| oB | |||
| sB | |||
|- | |- | ||
| 53 | |||
| 883.3 | |||
| | | | vM6 | ||
| | | downmajor 6th | ||
| | | vB | ||
| | | kM6 | ||
| classic major 6th | |||
| kB | |||
| kB | |||
|- | |- | ||
| 54 | |||
| 900.0 | |||
| | | | M6 | ||
| | | major 6th | ||
| B | |||
| | | M6 | ||
| major 6th | |||
| B | |||
| B | |||
|- | |- | ||
| 55 | |||
| 916.7 | |||
| | | | ^M6 | ||
| upmajor 6th | |||
| | | ^B | ||
| | | LM6 | ||
| large major 6th | |||
| LB | |||
| KB | |||
|- | |- | ||
| 56 | |||
| 933.3 | |||
| | | | ^^M6 | ||
| dupmajor 6th | |||
| | | ^^B | ||
| | | SM6 | ||
| supermajor 6th | |||
| SB | |||
| SB | |||
|- | |- | ||
| 57 | |||
| 950.0 | |||
| ^<sup>3</sup>M6, <br>v<sup>3</sup>m7 | |||
| trupmajor 6th,<br>trudminor 7th | |||
| | | ^<sup>3</sup>B, <br>v<sup>3</sup>C | ||
| HM6, hm7 | |||
| hypermajor 6th, hypominor 7th | |||
| | | HB, hC | ||
| UB, uC | |||
|- | |- | ||
| 58 | |||
| 966.7 | |||
| | | | vvm7 | ||
| | | dudminor 7th | ||
| | | vvC | ||
| | | sm7 | ||
| subminor 7th | |||
| sC | |||
| sC | |||
|- | |- | ||
| 59 | |||
| 983.3 | |||
| | | | vm7 | ||
| | | downminor 7th | ||
| | | vC | ||
| | | lm7 | ||
| little minor 7th | |||
| lC | |||
| kC | |||
|- | |- | ||
| 60 | |||
| 1000.0 | |||
| | | | m7 | ||
| | | minor 7th | ||
| C | |||
| | | m7 | ||
| minor 7th | |||
| C | |||
| C | |||
|- | |- | ||
| 61 | |||
| 1016.7 | |||
| | | | ^m7 | ||
| | | upminor 7th | ||
| | | ^C | ||
| | | Km7 | ||
| classic/comma-wide minor 7th | |||
| KC | |||
| KC | |||
|- | |- | ||
| 62 | |||
| 1033.3 | |||
| | | ^^m7, v~7 | ||
| dupminor 7th, downmid 7th | |||
| | | ^^C | ||
| | | Om7 | ||
| on minor 7th | |||
| OC | |||
| SC | |||
|- | |- | ||
| 63 | |||
| 1050.0 | |||
| ~7 | |||
| mid 7th | |||
| ^<sup>3</sup>C | |||
| | | N7, hd8 | ||
| neutral 7th, hypo dim 8ve | |||
| UC/uC#, hDb | |||
| UC/uC#, uDb | |||
|- | |- | ||
| 64 | |||
| 1066.7 | |||
| | | | ^~7, vvM7 | ||
| | | upmid 7th, dudmajor 7th | ||
| | | vvC# | ||
| | | oM7, sd8 | ||
| off major 7th, sub dim 8ve | |||
| oC#, sDb | |||
| sC#, sDb | |||
|- | |- | ||
| 65 | |||
| 1083.3 | |||
| | | | vM7 | ||
| | | downmajor 7th | ||
| | | vC# | ||
| | | kM7, ld8 | ||
| classic major 7th, little dim 8ve | |||
| kC#, lDb | |||
| kC#, kDb | |||
|- | |- | ||
| 66 | |||
| 1100.0 | |||
| | | | M7 | ||
| | | major 7th | ||
| C# | |||
| | | M7, d8 | ||
| major 7th, dim 8ve | |||
| C#, Db | |||
| C#, Db | |||
|- | |- | ||
| 67 | |||
| 1116.7 | |||
| | | | ^M7 | ||
| upmajor 7th | |||
| | | ^C# | ||
| | | LM7, Kd8 | ||
| large major 7th, comma-wide dim 8ve | |||
| LC#, KDb | |||
| KC#, KDb | |||
|- | |- | ||
| 68 | |||
| 1133.3 | |||
| | | | ^^M7 | ||
| dupmajor 7th | |||
| | | ^^C# | ||
| | | SM7, KKd8 | ||
| supermajor 7th, classic dim 8ve | |||
| SC#, KKDb | |||
| SC#, SDb, (KKDb) | |||
|- | |- | ||
| 69 | |||
| 1150.0 | |||
| ^<sup>3</sup>M7, v<sup>3</sup>8 | |||
| trupmajor 7th, trud octave | |||
| | | ^<sup>3</sup>C#, v<sup>3</sup>D | ||
| HM7, u8, h8 | |||
| hypermajor 7th, unter 8ve, hypo 8ve | |||
| | | HC#, uD, hD | ||
| UC#, uDb, uD | |||
|- | |- | ||
| 70 | |||
| 1166.7 | |||
| | | | vv8 | ||
| | | dud octave | ||
| | | vvD | ||
| | | s8, o8 | ||
| sub 8ve, off 8ve | |||
| sD, oD | |||
| sD | |||
|- | |- | ||
| 71 | |||
| 1183.3 | |||
| | | | v8 | ||
| | | down octave | ||
| | | vD | ||
| | | k8, l8 | ||
| comma-narrow 8ve, little 8ve | |||
| kD, lD | |||
| kD | |||
|- | |- | ||
| 72 | |||
| 1200.0 | |||
| | | | P8 | ||
| | | perfect octave | ||
| D | |||
| | | P8 | ||
| perfect octave | |||
| D | |||
| D | |||
|} | |} | ||
{| class="wikitable" | === Interval quality and chord names in color notation === | ||
Combining ups and downs notation with [[color notation]], qualities can be loosely associated with colors: | |||
{| class="wikitable center-all" | |||
|- | |||
! Quality | |||
! [[Color notation|Color]] | |||
! Monzo format | |||
! Examples | |||
|- | |||
| dudminor | |||
| zo | |||
| (a b 0 1) | |||
| [[7/6]], [[7/4]] | |||
|- | |||
| minor | |||
| fourthward wa | |||
| (a b), b < -1 | |||
| [[32/27]], [[16/9]] | |||
|- | |||
| upminor | |||
| gu | |||
| (a b -1) | |||
| [[6/5]], [[9/5]] | |||
|- | |||
| rowspan="2" | dupminor, <br>downmid | |||
| luyo | |||
| (a b 1 0 -1) | |||
| [[15/11]] | |||
|- | |||
| tho | |||
| (a b 0 0 0 1) | |||
| [[13/8]], [[13/9]] | |||
|- | |||
| rowspan="2" | mid | |||
| ilo | |||
| (a b 0 0 1) | |||
| [[11/9]], [[11/6]] | |||
|- | |||
| lu | |||
| (a b 0 0 -1) | |||
| [[12/11]], [[18/11]] | |||
|- | |||
| rowspan="2" | upmid, <br>dudmajor | |||
| logu | |||
| (a b -1 0 1) | |||
| [[11/10]] | |||
|- | |||
| thu | |||
| (a b 0 0 0 -1) | |||
| [[16/13]], [[18/13]] | |||
|- | |||
| downmajor | |||
| yo | |||
| (a b 1) | |||
| [[5/4]], [[5/3]] | |||
|- | |||
| major | |||
| fifthward wa | |||
| (a b), b > 1 | |||
| [[9/8]], [[27/16]] | |||
|- | |- | ||
| dupmajor | |||
| ru | |||
| (a b 0 -1) | |||
| [[9/7]], [[12/7]] | |||
|- | |- | ||
| | | rowspan="2" | trupmajor, <br>trudminor | ||
| | | thogu | ||
| | | (a b -1 0 0 1) | ||
| | | [[13/10]] | ||
|- | |- | ||
| | | thuyo | ||
| | | (a b 1 0 0 -1) | ||
| | | [[15/13]] | ||
| | |} | ||
All 72edo chords can be named using ups and downs. An up, down or mid after the chord root affects the 3rd, 6th, 7th, and/or the 11th (every other note of a stacked-3rds chord 6-1-3-5-7-9-11-13). Alterations are always enclosed in parentheses, additions never are. Here are the zo, gu, ilo, yo and ru triads: | |||
{| class="wikitable center-all" | |||
|- | |- | ||
| | ! [[Color notation|Color of the 3rd]] | ||
! JI chord | |||
! Notes as edosteps | |||
! Notes of C chord | |||
! Written name | |||
! Spoken name | |||
|- | |- | ||
| | | zo | ||
| | | 6:7:9 | ||
| | | 0-16-42 | ||
| | | C vvEb G | ||
| Cvvm | |||
| C dudminor | |||
|- | |- | ||
| | | gu | ||
| | | 10:12:15 | ||
| | | 0-19-42 | ||
| | | C ^Eb G | ||
| C^m | |||
| C upminor | |||
|- | |- | ||
| | | ilo | ||
| style=" | | 18:22:27 | ||
| 0-21-42 | |||
| | | C v<span style="font-size: 90%; vertical-align: super;">3</span>E G | ||
| C~ | |||
| C mid | |||
|- | |- | ||
| | | yo | ||
| | | 4:5:6 | ||
| | | 0-23-42 | ||
| | | C vE G | ||
| Cv | |||
| C downmajor or C down | |||
|- | |- | ||
| | | ru | ||
| | | 14:18:27 | ||
| | | 0-26-42 | ||
| | | C ^^E G | ||
| C^^ | |||
| C dupmajor or C dup | |||
|} | |} | ||
For a more complete list, see [[Ups and downs notation #Chord names in other EDOs]]. | |||
=== Relationship between primes and rings === | |||
In 72tet, there are 6 [[ring number|rings]]. 12edo is the plain ring; thus every 6 degrees is the 3-limit. | |||
Then, after each subsequent degree in reverse, a new prime limit is unveiled from it: | |||
* −1 degree (the down ring) corrects [[81/64]] to [[5/4]] via descending [[81/80]] | |||
* −2 degrees (the dud ring) corrects [[16/9]] to [[7/4]] via descending [[64/63]] | |||
* +3 degrees (the trup ring) corrects [[4/3]] to [[11/8]] via [[33/32]] | |||
* +2 degrees (the dup ring) corrects [[128/81]] to [[13/8]] via [[1053/1024]] | |||
* 0 degrees (the plain ring) corrects [[256/243]] to [[17/16]] via [[4131/4096]] | |||
* 0 degrees (the plain ring) corrects [[32/27]] to [[19/16]] via [[513/512]] | |||
Thus the product of a ratio's monzo with {{map| 0 0 -1 -2 3 2 0 0 }}, modulo 6, specifies which ring the ratio lies on. | |||
== Notation == | |||
=== Stein–Zimmermann–Gould notation === | |||
[[Stein–Zimmermann–Gould notation]] uses sharps and flats combined with quartertone accidentals and arrows: | |||
{{Sharpness-sharp6-szg}} | |||
If double arrows are not desirable, arrows can be attached to quarter-tone accidentals: | |||
{{Sharpness-sharp6-qt-szg}} | |||
=== Kite's ups and downs notation === | |||
72edo can also be notated with [[Kite's ups and downs notation|Kite's ups and downs]], spoken as up, dup, trup, dudsharp, downsharp, sharp, upsharp etc. and down, dud, trud, dupflat etc. | |||
{{Ups and downs sharpness}} | |||
Half-sharps and half-flats can be used to avoid triple arrows: | |||
{{Ups and downs sharpness|72|true}} | |||
=== Sagittal notation === | |||
This notation uses the same sagittal sequence as edos [[65edo #Sagittal notation|65-]] and [[79edo #Sagittal notation|79edo]], and is a superset of the notations for edos [[36edo #Sagittal notation|36]], [[24edo #Sagittal notation|24]], [[18edo #Sagittal notation|18]], [[12edo #Sagittal notation|12]], [[8edo #Sagittal notation|8]], and [[6edo #Sagittal notation|6]]. | |||
==== Evo flavor ==== | |||
{{Sagittal chart|Evo}} | |||
==== Evo-SZ flavor ==== | |||
{{Sagittal chart|Evo-SZ}} | |||
==== Revo flavor ==== | |||
{{Sagittal chart}} | |||
From the appendix to [[The Sagittal Songbook]] by [[Jacob Barton|Jacob A. Barton]], a diagram of how to notate 72edo in the Revo flavor of Sagittal: | |||
<div class="noresize"> | |||
[[File:72edo Sagittal.png]] | |||
</div> | |||
=== Ivan Wyschnegradsky's notation === | |||
{{Sharpness-sharp6-iw|72}} | |||
== Approximation to JI == | |||
[[File:72ed2.svg|250px|thumb|right|none|alt=alt : Your browser has no SVG support.|Selected intervals approximated in 72edo]] | |||
{| class="wikitable" | === Interval mappings === | ||
{{Q-odd-limit intervals|72}} | |||
=== Zeta properties === | |||
72edo is the ninth [[zeta integral edo]], as well as being a peak and gap edo, and the maximum value of the [[the Riemann zeta function and tuning#The Z function|Z function]] in the region near 72 occurs at 71.9506, giving an octave of 1200.824 cents, the stretched octaves of the zeta tuning. Below is a plot of Z in the region around 72. | |||
[[File:plot72.png|alt=plot72.png|plot72.png]] | |||
== Regular temperament properties == | |||
{| class="wikitable center-4 center-5 center-6" | |||
|- | |||
! rowspan="2" | [[Subgroup]] | |||
! rowspan="2" | [[Comma list]] | |||
! rowspan="2" | [[Mapping]] | |||
! rowspan="2" | Optimal<br>8ve stretch (¢) | |||
! colspan="2" | Tuning error | |||
|- | |||
! [[TE error|Absolute]] (¢) | |||
! [[TE simple badness|Relative]] (%) | |||
|- | |- | ||
| 2.3.5 | |||
| 15625/15552, 531441/524288 | |||
| {{Mapping| 72 114 167 }} | |||
| +0.839 | |||
| 0.594 | |||
| 3.56 | |||
|- | |- | ||
| | | 2.3.5.7 | ||
| | | 225/224, 1029/1024, 4375/4374 | ||
| | | {{Mapping| 72 114 167 202 }} | ||
| | | +0.822 | ||
| | | 0.515 | ||
| 3.09 | |||
|- | |- | ||
| | | 2.3.5.7.11 | ||
| | | 225/224, 243/242, 385/384, 4000/3993 | ||
| | | {{Mapping| 72 114 167 202 249 }} | ||
| | | +0.734 | ||
| | | 0.493 | ||
| 2.96 | |||
|- | |- | ||
| | | 2.3.5.7.11.13 | ||
| | | 169/168, 225/224, 243/242, 325/324, 385/384 | ||
| | | {{Mapping| 72 114 167 202 249 266 }} | ||
| | | +0.936 | ||
| 0.638 | |||
| 3.82 | |||
|- | |- | ||
| | | 2.3.5.7.11.13.17 | ||
| | | 169/168, 221/220, 225/224, 243/242, 273/272, 325/324 | ||
| | | {{Mapping| 72 114 167 202 249 266 294 }} | ||
| | | +0.975 | ||
| | | 0.599 | ||
| 3.59 | |||
|- | |- | ||
| | | 2.3.5.7.11.13.17.19 | ||
| | | 153/152, 169/168, 210/209, 221/220, 225/224, 243/242, 273/272 | ||
| | | {{Mapping| 72 114 167 202 249 266 294 306 }} | ||
| | | +0.780 | ||
| | | 0.762 | ||
| 4.57 | |||
|} | |} | ||
* 72et has lower relative errors than any previous equal temperaments in the 7-, 11-, 13-, 17-, and 19-limit. The next equal temperaments doing better in these subgroups are [[99edo|99]], [[270edo|270]], [[224edo|224]], [[494edo|494]], and [[217edo|217]], respectively. | |||
= | === Commas === | ||
Commas tempered out by 72edo include… | |||
{| class="wikitable" | {| class="commatable wikitable center-1 center-2 right-4" | ||
|- | |||
! [[Harmonic limit|Prime<br>limit]] | |||
! [[Ratio]]<ref group="note">{{rd}}</ref> | |||
! [[Monzo]] | |||
! [[Cents]] | |||
! Name(s) | |||
|- | |||
| 3 | |||
| [[531441/524288|(12 digits)]] | |||
| {{Monzo| -19 12 }} | |||
| 23.46 | |||
| Pythagorean comma | |||
|- | |||
| 5 | |||
| [[15625/15552]] | |||
| {{Monzo| -6 -5 6 }} | |||
| 8.11 | |||
| Kleisma | |||
|- | |||
| 5 | |||
| [[34171875/33554432|(16 digits)]] | |||
| {{Monzo| -25 7 6 }} | |||
| 31.57 | |||
| [[Ampersand comma]] | |||
|- | |||
| 5 | |||
| [[129140163/128000000|(18 digits)]] | |||
| {{Monzo| -13 17 -6 }} | |||
| 15.35 | |||
| [[Graviton]] | |||
|- | |||
| 5 | |||
| <abbr title="7629394531250/7625597484987">(26 digits)</abbr> | |||
| {{Monzo| 1 -27 18 }} | |||
| 0.86 | |||
| [[Ennealimma]] | |||
|- | |||
| 7 | |||
| [[225/224]] | |||
| {{Monzo| -5 2 2 -1 }} | |||
| 7.71 | |||
| Marvel comma | |||
|- | |||
| 7 | |||
| [[1029/1024]] | |||
| {{Monzo| -10 1 0 3 }} | |||
| 8.43 | |||
| Gamelisma | |||
|- | |||
| 7 | |||
| [[2401/2400]] | |||
| {{Monzo| -5 -1 -2 4 }} | |||
| 0.72 | |||
| Breedsma | |||
|- | |||
| 7 | |||
| [[4375/4374]] | |||
| {{Monzo| -1 -7 4 1 }} | |||
| 0.40 | |||
| Ragisma | |||
|- | |||
| 7 | |||
| [[16875/16807]] | |||
| {{Monzo| 0 3 4 -5 }} | |||
| 6.99 | |||
| Mirkwai comma | |||
|- | |||
| 7 | |||
| [[19683/19600]] | |||
| {{Monzo| -4 9 -2 -2 }} | |||
| 7.32 | |||
| Cataharry comma | |||
|- | |||
| 7 | |||
| <abbr title="420175/419904">(12 digits)</abbr> | |||
| {{Monzo | -6 -8 2 5 }} | |||
| 1.12 | |||
| [[Wizma]] | |||
|- | |||
| 7 | |||
| <abbr title="250047/250000">(12 digits)</abbr> | |||
| {{Monzo| -4 6 -6 3 }} | |||
| 0.33 | |||
| [[Landscape comma]] | |||
|- | |||
| 11 | |||
| [[243/242]] | |||
| {{Monzo| -1 5 0 0 -2}} | |||
| 7.14 | |||
| Rastma | |||
|- | |||
| 11 | |||
| [[385/384]] | |||
| {{Monzo| -7 -1 1 1 1 }} | |||
| 4.50 | |||
| Keenanisma | |||
|- | |||
| 11 | |||
| [[441/440]] | |||
| {{Monzo| -3 2 -1 2 -1 }} | |||
| 3.93 | |||
| Werckisma | |||
|- | |||
| 11 | |||
| [[540/539]] | |||
| {{Monzo| 2 3 1 -2 -1 }} | |||
| 3.21 | |||
| Swetisma | |||
|- | |||
| 11 | |||
| [[1375/1372]] | |||
| {{Monzo| -2 0 3 -3 1 }} | |||
| 3.78 | |||
| Moctdel comma | |||
|- | |||
| 11 | |||
| [[3025/3024]] | |||
| {{Monzo| -4 -3 2 -1 2 }} | |||
| 0.57 | |||
| Lehmerisma | |||
|- | |||
| 11 | |||
| [[4000/3993]] | |||
| {{Monzo| 5 -1 3 0 -3 }} | |||
| 3.03 | |||
| Wizardharry comma | |||
|- | |||
| 11 | |||
| [[6250/6237]] | |||
| {{Monzo| 1 -4 5 -1 -1 }} | |||
| 3.60 | |||
| Liganellus comma | |||
|- | |||
| 11 | |||
| [[9801/9800]] | |||
| {{Monzo| -3 4 -2 -2 2 }} | |||
| 0.18 | |||
| Kalisma | |||
|- | |||
| 11 | |||
| <abbr title="1771561/1769472">(14 digits)</abbr> | |||
| {{Monzo| 16 -3 0 0 6 }} | |||
| 2.04 | |||
| [[Nexus comma]] | |||
|- | |||
| 13 | |||
| [[169/168]] | |||
| {{Monzo| -3 -1 0 -1 0 2 }} | |||
| 10.27 | |||
| Buzurgisma | |||
|- | |||
| 13 | |||
| [[325/324]] | |||
| {{Monzo| -2 -4 2 0 0 1 }} | |||
| 5.34 | |||
| Marveltwin comma | |||
|- | |||
| 13 | |||
| [[351/350]] | |||
| {{Monzo| -1 3 -2 -1 0 1 }} | |||
| 4.94 | |||
| Ratwolfsma | |||
|- | |||
| 13 | |||
| [[364/363]] | |||
| {{Monzo| 2 -1 0 1 -2 1 }} | |||
| 4.76 | |||
| Minor minthma | |||
|- | |||
| 13 | |||
| [[625/624]] | |||
| {{Monzo| -4 -1 4 0 0 -1 }} | |||
| 2.77 | |||
| Tunbarsma | |||
|- | |- | ||
| 13 | |||
| [[676/675]] | |||
| {{Monzo| 2 -3 -2 0 0 2 }} | |||
| 2.56 | |||
| Island comma | |||
|- | |- | ||
| | | | 13 | ||
| | 1 | | [[729/728]] | ||
| | | | {{Monzo| -3 6 0 -1 0 -1 }} | ||
| 2.38 | |||
| Squbema | |||
|- | |- | ||
| | | | 13 | ||
| | | | [[1001/1000]] | ||
| | | | {{Monzo| -3 0 -3 1 1 1 }} | ||
| 1.73 | |||
| Sinbadma | |||
|- | |- | ||
| | | | 13 | ||
| | | | [[1575/1573]] | ||
| | | | {{Monzo| 2 2 1 -2 -1 }} | ||
| 2.20 | |||
| Nicola | |||
|- | |- | ||
| | | | 13 | ||
| | | | [[1716/1715]] | ||
| | | | {{Monzo| 2 1 -1 -3 1 1 }} | ||
| 1.01 | |||
| Lummic comma | |||
|- | |- | ||
| | | | 13 | ||
| | | | [[2080/2079]] | ||
| | | | {{Monzo| 5 -3 1 -1 -1 1 }} | ||
| 0.83 | |||
| Ibnsinma | |||
|- | |- | ||
| | 1 | | 13 | ||
| | | | [[6656/6655]] | ||
| | | {{Monzo| 9 0 -1 0 -3 1 }} | ||
| 0.26012 | |||
| Jacobin comma | |||
|} | |||
<references group="note" /> | |||
=== Rank-2 temperaments === | |||
* [[List of edo-distinct 72et rank two temperaments]] | |||
72edo provides the [[optimal patent val]] for [[miracle]] and [[wizard]] in the 7-limit, miracle, [[catakleismic]], [[bikleismic]], [[compton]], [[ennealimnic]], [[ennealiminal]], [[enneaportent]], [[marvolo]] and [[catalytic]] in the 11-limit, and catakleismic, bikleismic, compton, [[comptone]], [[enneaportent]], [[ennealim]], catalytic, marvolo, [[manna]], [[hendec]], [[lizard]], [[neominor]], [[hours]], and [[semimiracle]] in the 13-limit. | |||
{| class="wikitable center-all left-5" | |||
|+ style="font-size: 105%;" | Table of rank-2 temperaments by generator | |||
|- | |- | ||
! Periods<br>per 8ve | |||
! Generator* | |||
! Cents* | |||
! Associated<br>ratio* | |||
! Temperament | |||
|- | |- | ||
| 1 | |||
| | | 1\72 | ||
| | | | 16.7 | ||
| 105/104 | |||
| [[Quincy]] | |||
|- | |- | ||
| 1 | |||
| | | 5\72 | ||
| | [[ | | 83.3 | ||
| 21/20 | |||
| [[Marvolo]] | |||
|- | |- | ||
| 1 | |||
| | | 7\72 | ||
| | | | 116.7 | ||
| 15/14 | |||
| [[Miracle]] / benediction / manna | |||
|- | |- | ||
| 1 | |||
| | | 17\72 | ||
| | [[ | | 283.3 | ||
| 13/11 | |||
| [[Neominor]] | |||
|- | |- | ||
| 1 | |||
| | | 19\72 | ||
| | [[ | | 316.7 | ||
| 6/5 | |||
| [[Catakleismic]] | |||
|- | |- | ||
| | | 1 | ||
| | | 25\72 | ||
| | | | 416.7 | ||
| 14/11 | |||
| [[Sqrtphi]] | |||
|- | |- | ||
| | | 1 | ||
| | | 29\72 | ||
| | [[ | | 483.3 | ||
| 45/34 | |||
| [[Hemiseven]] | |||
|- | |- | ||
| | | | 1 | ||
| | | 31\72 | ||
| | | | 516.7 | ||
| 27/20 | |||
| [[Gravity]] / [[marvo]] / [[zarvo]] | |||
|- | |- | ||
| | | 1 | ||
| | | 35\72 | ||
| | [[ | | 583.3 | ||
| 7/5 | |||
| [[Cotritone]] | |||
|- | |- | ||
| 2 | |||
| | | 5\72 | ||
| | [[ | | 83.3 | ||
| 21/20 | |||
| [[Harry]] | |||
|- | |- | ||
| 2 | |||
| | | 7\72 | ||
| | | | 116.7 | ||
| 15/14 | |||
| [[Semimiracle]] | |||
|- | |- | ||
| | | 2 | ||
| | | 11\72 | ||
| | | | 183.3 | ||
| 10/9 | |||
| [[Unidec]] / hendec | |||
|- | |- | ||
| | 3 | | 2 | ||
| | | 21\72<br>(19\72) | ||
| 316.7<br>(283.3) | |||
| 6/5<br>(13/11) | |||
| [[Bikleismic]] | |||
|- | |- | ||
| | | | 2 | ||
| | | 23\72<br>(13\72) | ||
| | | | 383.3<br>(216.7) | ||
| 5/4<br>(17/15) | |||
| [[Wizard]] / lizard / gizzard | |||
|- | |- | ||
| 3 | |||
| 11\72 | |||
| | [[Mirkat | | 183.3 | ||
| 10/9 | |||
| [[Mirkat]] | |||
|- | |- | ||
| | | 3 | ||
| | | 19\72<br>(5\72) | ||
| | [[ | | 316.7<br>(83.3) | ||
| 6/5<br>(21/20) | |||
| [[Tritikleismic]] | |||
|- | |- | ||
| 4 | |||
| | | 19\72<br>(1\72) | ||
| | | | 316.7<br>(16.7) | ||
| 6/5<br>(105/104) | |||
| [[Quadritikleismic]] | |||
|- | |- | ||
| | | | 8 | ||
| | | 34\72<br>(2\72) | ||
| | | | 566.7<br>(33.3) | ||
| 168/121<br>(55/54) | |||
| [[Octowerck]] / octowerckis | |||
|- | |- | ||
| | | 8 | ||
| | | 35\72<br>(1\72) | ||
| | | | 583.3<br>(16.7) | ||
| 7/5<br>(100/99) | |||
| [[Octoid]] / octopus | |||
|- | |- | ||
| | 6 | | 9 | ||
| | 5\72 | | 19\72<br>(3\72) | ||
| | | | 316.7<br>(50.0) | ||
| 6/5<br>(36/35) | |||
| [[Ennealimmal]] / ennealimnic / ennealiminal | |||
|- | |||
| 9 | |||
| 23\72<br>(1\72) | |||
| 383.3<br>(16.7) | |||
| 5/4<br>(105/104) | |||
| [[Enneaportent]] | |||
|- | |||
| 12 | |||
| 23\72<br>(1\72) | |||
| 383.3<br>(16.7) | |||
| 5/4<br>(100/99) | |||
| [[Compton]] / comptone | |||
|- | |||
| 18 | |||
| 19\72<br>(1\72) | |||
| 316.7<br>(16.7) | |||
| 6/5<br>(105/104) | |||
| [[Hemiennealimmal]] | |||
|- | |||
| 24 | |||
| 23\72<br>(1\72) | |||
| 383.3<br>(16.7) | |||
| 5/4<br>(105/104) | |||
| [[Hours]] | |||
|- | |||
| 36 | |||
| 23\72<br>(1\72) | |||
| 383.3<br>(16.7) | |||
| 5/4<br>(81/80) | |||
| [[Gamelstearn]] | |||
|} | |||
<nowiki/>* [[Normal forms #Equave-reduced-generator form|Octave-reduced form]], reduced to the first half-octave, and [[normal forms #Minimal-generator form|minimal form]] in parentheses if distinct | |||
== Octave stretch or compression == | |||
72edo's approximations of harmonics 3, 5, 7, 11, 13 and 17 can all be improved by slightly [[stretched and compressed tuning|stretching the octave]], using tunings such as [[114edt]], [[zpi|380zpi]] or [[186ed6]]. 114edt is quite hard and might be best for the 13- or 17-limit specifically. 380zpi and 186ed6 are milder and less disruptive, suitable for 11-limit and/or full 19-limit harmonies. | |||
== Scales == | |||
; [[Miracle]]-tempered scales | |||
* [[Blackjack]], [[miracle_8]], [[miracle_10]], [[miracle_12]], [[miracle_12a]], [[miracle_24hi]], [[miracle_24lo]] | |||
; [[Maeve Gutierrez]]'s scales | |||
* [[Maeve Gutierrez#Gutierrez-Lambeth quasi-subharmonic pentatonic|Gutierrez-Lambeth quasi-subharmonic pentatonic]] (''octave reduced: 10 6 25 17 14'') | |||
* [[Maeve Gutierrez|Gutierrez Moonglade]]: 1 4 6 1 5 2 4 7 1 4 6 1 1 4 5 1 5 1 2 3 1 1 5 1 | |||
; [[Budjarn Lambeth]]'s scales | |||
* [[Magnetosphere scale|Magnetosphere]], [[blackened skies]], [[lost spirit]], [[moon dust]], [[5- to 10-tone scales in 72edo]] | |||
; [[Gene Ward Smith]]'s scales | |||
* [[Smithgw72a]], [[smithgw72b]], [[smithgw72c]], [[smithgw72d]], [[smithgw72e]], [[smithgw72f]], [[smithgw72g]], [[smithgw72h]], [[smithgw72i]], [[smithgw72j]] | |||
; [[Iannis Xenakis]]' scales | |||
* [[xenakis_chrome]], [[xenakis_diat]], [[xenakis_schrome]] | |||
; Others | |||
* Freivald [[Lazysunday]] scale | |||
* [[Genus24255et72|Euler(24255) genus in 72 equal]] | |||
* [[Harry Partch's 43-tone scale]]: 1 2 2 2 2 1 1 1 2 2 2 1 2 2 2 1 2 2 1 2 2 2 2 2 1 2 2 1 2 2 2 1 2 2 2 1 1 1 2 2 2 2 1 | |||
* [[JuneGloom]] | |||
* [[Keenanmarvel]] | |||
* [[Prodigy]][19]: 5 2 5 4 5 2 5 2 5 2 5 4 5 2 5 2 5 5 2 | |||
=== Harmonic scale === | |||
Mode 8 of the harmonic series—[[overtone scale|harmonics 8 through 16]], octave repeating—is well-represented in 72edo. Note that all the different step sizes are distinguished, except for 13:12 and 14:13 (conflated to 8\72edo, 133.3 cents) and 15:14 and 16:15 (conflated to 7\72edo, 116.7 cents, the generator for miracle temperament). | |||
{| class="wikitable" | |||
|- | |- | ||
| | | ! Harmonics in "Mode 8": | ||
| | | | 8 | ||
| | | | | ||
| 9 | |||
| | |||
| 10 | |||
| | |||
| 11 | |||
| | |||
| 12 | |||
| | |||
| 13 | |||
| | |||
| 14 | |||
| | |||
| 15 | |||
| | |||
| 16 | |||
|- | |- | ||
| | 8 | ! …as JI Ratio from 1/1: | ||
| | 2 | | 1/1 | ||
| | | | | ||
| 9/8 | |||
| | |||
| 5/4 | |||
| | |||
| 11/8 | |||
| | |||
| 3/2 | |||
| | |||
| 13/8 | |||
| | |||
| 7/4 | |||
| | |||
| 15/8 | |||
| | |||
| 2/1 | |||
|- | |- | ||
| | 8 | ! …in cents: | ||
| | | | 0 | ||
| | | | | ||
| 203.9 | |||
| | |||
| 386.3 | |||
| | |||
| 551.3 | |||
| | |||
| 702.0 | |||
| | |||
| 840.5 | |||
| | |||
| 968.8 | |||
| | |||
| 1088.3 | |||
| | |||
| 1200.0 | |||
|- | |- | ||
| | | ! Nearest degree of 72edo: | ||
| | | | 0 | ||
| | | | | ||
| 12 | |||
| | |||
| 23 | |||
| | |||
| 33 | |||
| | |||
| 42 | |||
| | |||
| 50 | |||
| | |||
| 58 | |||
| | |||
| 65 | |||
| | |||
| 72 | |||
|- | |- | ||
| | | ! …in cents: | ||
| | 3 | | 0 | ||
| | | | | ||
| 200.0 | |||
| | |||
| 383.3 | |||
| | |||
| 550.0 | |||
| | |||
| 700.0 | |||
| | |||
| 833.3 | |||
| | |||
| 966.7 | |||
| | |||
| 1083.3 | |||
| | |||
| 1200.0 | |||
|- | |- | ||
| | 12 | ! Steps as Freq. Ratio: | ||
| | | | | ||
| | | | 9:8 | ||
| | |||
| 10:9 | |||
| | |||
| 11:10 | |||
| | |||
| 12:11 | |||
| | |||
| 13:12 | |||
| | |||
| 14:13 | |||
| | |||
| 15:14 | |||
| | |||
| 16:15 | |||
| | |||
|- | |- | ||
| | | ! …in cents: | ||
| | | | | ||
| | | | 203.9 | ||
| | |||
| 182.4 | |||
| | |||
| 165.0 | |||
| | |||
| 150.6 | |||
| | |||
| 138.6 | |||
| | |||
| 128.3 | |||
| | |||
| 119.4 | |||
| | |||
| 111.7 | |||
| | |||
|- | |- | ||
| | | ! Nearest degree of 72edo: | ||
| | | | | ||
| | | | 12 | ||
| | |||
| 11 | |||
| | |||
| 10 | |||
| | |||
| 9 | |||
| | |||
| 8 | |||
| | |||
| 8 | |||
| | |||
| 7 | |||
| | |||
| 7 | |||
| | |||
|- | |- | ||
| | | ! …in cents: | ||
| | | | | ||
| | | | 200.0 | ||
| | |||
| 183.3 | |||
| | |||
| 166.7 | |||
| | |||
| 150.0 | |||
| | |||
| 133.3 | |||
| | |||
| 133.3 | |||
| | |||
| 116.7 | |||
| | |||
| 116.7 | |||
| | |||
|} | |} | ||
= | == Instruments == | ||
If one can get six 12edo instruments tuned a twelfth-tone apart, it is possible to use these instruments in combination to play the full gamut of 72edo (see Music). | |||
One can also use a skip fretting system: | |||
* [[Skip fretting system 72 2 27]] | |||
Alternatively, an appropriately mapped keyboard of sufficient size is usable for playing 72edo: | |||
* [[Lumatone mapping for 72edo]] | |||
== Music == | |||
; [[Bryan Deister]] | |||
* [https://www.youtube.com/shorts/VwVp3RVao_k ''microtonal improvisation in 72edo''] (2025) | |||
[[ | ; [[Ambient Esoterica]] | ||
* [https://www.youtube.com/watch?v=seWcDAoQjxY ''Goetic Synchronities''] (2023) | |||
* [https://www.youtube.com/watch?v=CrcdM1e2b6Q ''Rainy Day Generative Pillow''] (2024) | |||
; [[Jake Freivald]] | |||
* [https://web.archive.org/web/20201127014336/http://micro.soonlabel.com/gene_ward_smith/Others/Freivald/Lazy%20Sunday.mp3 ''Lazy Sunday''] in the [[lazysunday]] scale | |||
{{Wikipedia|In vain (Haas)}} | |||
[ | ; [[Georg Friedrich Haas]] | ||
* [https://www.youtube.com/watch?v=ix4yA-c-Pi8 ''Blumenstück''] (2000) | |||
* [https://youtu.be/cmX-h7_us7A ''in vain''] (2000) ([https://www.universaledition.com/georg-friedrich-haas-278/works/in-vain-7566 score]) | |||
; [[Budjarn Lambeth]] | |||
* [https://youtu.be/eWMRJihZbPc ''Blackened Skies''] (2020) | |||
; [[Claudi Meneghin]] | |||
* [https://web.archive.org/web/20201127015744/http://micro.soonlabel.com/gene_ward_smith/Others/Meneghin/Claudi-Meneghin-Twinkle-canon-72-edo.mp3 ''Twinkle canon – 72 edo''] | |||
* [https://www.youtube.com/watch?v=zR0NDgh4944 ''The Miracle Canon'', 3-in-1 on a Ground] | |||
* [https://www.youtube.com/watch?v=w6Bckog1eOM ''Sicilienne in Miracle''] | |||
* [https://www.youtube.com/watch?v=QKeZLtFHfNU ''Arietta with 5 Variations'', for Organ] (2024) | |||
; [[Prent Rodgers]] | |||
* [https://web.archive.org/web/20201127012907/http://micro.soonlabel.com/gene_ward_smith/Others/Rodgers/drum12a-c-t9.mp3 ''June Gloom #9''] | |||
; [[Gene Ward Smith]] | |||
[[ | * [https://www.archive.org/details/Kotekant ''Kotekant''] [https://www.archive.org/download/Kotekant/kotekant.mp3 play] (2010) | ||
[[ | ;[[Ivan Wyschnegradsky]] | ||
* [https://www.youtube.com/watch?v=RCcJHCkYQ6U ''Arc-en-ciel, for 6 pianos in twelfth tones, Op. 37''] (1956) | |||
[[ | ; [[James Tenney]] | ||
* [https://www.youtube.com/watch?v=jGsxqU1PhZs&list=OLAK5uy_mKyMEMZW7noeLncJnu-JT65go8w7403DA ''Changes for Six Harps''] | |||
[[ | ; [[Xeno Ov Eleas]] | ||
* [https://www.youtube.com/watch?v=cx7I0NWem5w ''Χenomorphic Ghost Storm''] (2022) | |||
[[ | == External links == | ||
* [http://orthodoxwiki.org/Byzantine_Chant OrthodoxWiki Article on Byzantine chant, which uses 72edo] | |||
* [http://www.ekmelic-music.org/en/ Ekmelic Music Society/Gesellschaft für Ekmelische Musik], a group of composers and researchers dedicated to 72edo music | |||
* [http://72note.com/site/original.html Rick Tagawa's 72edo site], including theory and composers' list | |||
* [https://www.myspace.com/dawier Danny Wier, composer and musician who specializes in 72-edo] | |||
* [http://tonalsoft.com/enc/number/72edo.aspx 72-ed2 / 72-edo / 72-ET / 72-tone equal-temperament] on [[Tonalsoft Encyclopedia]] | |||
[[Category:Listen]] | |||
[[Category:Compton]] | |||
[[Category:Marvel]] | |||
[[Category:Miracle]] | |||
[[Category: | [[Category:Prodigy]] | ||
[[Category: | [[Category:Wizard]] | ||
[[Category: | |||
[[Category: | |||
[[Category: | |||
[[Category: | |||