User:Lhearne/Extra-Diatonic Intervals: Difference between revisions
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=== Neutrals === | === Neutrals === | ||
N2, N3, N6 and N7, i.e. neutral 2nds, 3rds, 6ths and 7ths, falling exactly in-between the major and minor intervals of the same interval class, add native support for neutral-thirds | N2, N3, N6 and N7, i.e. neutral 2nds, 3rds, 6ths and 7ths, falling exactly in-between the major and minor intervals of the same interval class, add native support for neutral-thirds temperament, where the N3 divides the P5 in exact halves and N2 divides the m3 is exact halves. In ups and downs neutrals indicated with '~' and said 'mid'. | ||
Extending this familiar application to provide support for larger neutral scales, we add that neutrals occur also between P4 and A4; P5 and d5; P1 and A1; and P8 and d8. | Extending this familiar application to provide support for larger neutral scales, we add that neutrals occur also between P4 and A4; P5 and d5; P1 and A1; and P8 and d8. | ||
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=== Intermediates === | === Intermediates === | ||
To provide native support for Barbados | To provide native support for [[The Archipelago|Barbados]] and Diminishes temperaments, intermediates are also added to the system. It should be noted immediately that intermediates are not as common to common microtonal interval naming as neutrals and though are a useful addition to this scheme, may be left out if desired. The appendix includes the MOS scales and edos from 'lists of all edos and MOS Scales', but without any intermediates. | ||
‘2-3’ lies exactly half-way between M2 and m3 and divides the P4 in half. It may be read ‘second-third’ or ‘serd’. ‘6-7’, it’s octave-inverse lies exactly half-way between M6 and m7 and may be read ‘sixth<!-- plural?! | ‘2-3’ lies exactly half-way between M2 and m3 and divides the P4 in half. It may be read ‘second-third’ or ‘serd’. ‘6-7’, it’s octave-inverse lies exactly half-way between M6 and m7 and may be read ‘sixth<!-- plural?! | ||
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P1 M2 2-3 3-4 P4 P5 5-6 6-7 m7 P8. | P1 M2 2-3 3-4 P4 P5 5-6 6-7 m7 P8. | ||
The final intermediate, ‘4-5’ lies exactly between P4 and P5 and divides the octave in half. It may be read ‘fourth-fifth’ or ‘firth’. | The final intermediate, ‘4-5’ lies exactly between P4 and P5 and divides the octave in half. It may be read ‘fourth-fifth’ or ‘firth’. It is necessary for [[Diminished]] temperament, where the half-octave cannot be represented as any alteration of A4 or d5. Diminished temperament has a period of 1/4 of an octave, an approximation of 6/5. Therefore, the difference between four 6/5's and 2, 648/625, is tempered out. | ||
Diminished[8] 1|0 (4) can be written as P1 sM2 Sm3 P4 4-5 Sm6 sM6 sM7 P8, and | |||
[[Diminished12|Diminished[12]]] 1|1 (4): P1 Sm2 sM2 Sm3 sM3 P4 4-5 P5 Sm6 sM6 Sm7 sM7 P8, | |||
== [[12edo]] and a problem == | |||
The primary interval names for 12edo are as we are familiar: | The primary interval names for 12edo are as we are familiar: | ||
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but the interval labeled A4/d5 has the secondary name '4-5'. | but the interval labeled A4/d5 has the secondary name '4-5'. | ||
We know that 12edo supports Diminished temperament, but we can't see that 12edo as equivalent to Diminished[12]: If we follow the rules from our premise, the notes of Diminished[12] in 12edo would give: P1 M2 m2 M3 m3 P4 A4/d5 P5 M6 m6 M7 m7 P8, with the majors and minor flipped. To be equivalent, sM must equal M and Sm must equal m. | |||
=== [[10edo]], Pajara and a problem === | === [[10edo]], Pajara and a problem === | ||
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Augmented[15] 2|2 (3): P1 Sm2 sM2 M2 Sm3 sM3 P4 Sd5 sA4 P5 Sm6 Sm7 SM6 m7 sM7 P8 | Augmented[15] 2|2 (3): P1 Sm2 sM2 M2 Sm3 sM3 P4 Sd5 sA4 P5 Sm6 Sm7 SM6 m7 sM7 P8 | ||
Porcupine[7] 3|3: P1 sM2 Sm3 P4 P5 sM6 Sm7 P8 | Porcupine[7] 3|3: P1 sM2 Sm3 P4 P5 sM6 Sm7 P8 | ||
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=== [[Mavila]] === | === [[Mavila]] === | ||
In Mavila, the perfect 5th is flatter than in 7edo, so major intervals are below minor and augmented below major. In Mavila the major third approximates 6/5 and the minor third 5/4, tempering out [[135/128]]. This presents no problem to the scheme however, and the rules are applied just the same. The small major third, 81/80 below 6/5 or 81/64 comes to [[32/27]], the minor 3rd, and the sub minor 3rd remains 7/6. | In Mavila, the perfect 5th is flatter than in 7edo, so major intervals are below minor and augmented below major. In Mavila the major third approximates 6/5 and the minor third 5/4, tempering out [[135/128]]. This presents no problem to the scheme however, and the rules are applied just the same. The small major third, 81/80 below 6/5 or 81/64 comes to [[32/27]], the minor 3rd, and the sub minor 3rd remains 7/6. | ||
Mavila[7] 3|3 can be written | Mavila[7] 3|3 can be written | ||
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We say that our first Mavila[9] interval names are not ''well-ordered'', where for an interval name set to be well-ordered, for each degree major must be above minor. By extension we defined a well-ordered interval names set as one in which ... ≤ dd ≤ d ≤ m ≤ M ≤ A ≤ AA ≤ ... or ... ≤ dd ≤ d ≤ P ≤ A ≤ AA ≤ ..., and where s_ ≤ _ ≤ S_ (where '_' represents any of ... dd, d, m, (P), M, A, AA ...). | We say that our first Mavila[9] interval names are not ''well-ordered'', where for an interval name set to be well-ordered, for each degree major must be above minor. By extension we defined a well-ordered interval names set as one in which ... ≤ dd ≤ d ≤ m ≤ M ≤ A ≤ AA ≤ ... or ... ≤ dd ≤ d ≤ P ≤ A ≤ AA ≤ ..., and where s_ ≤ _ ≤ S_ (where '_' represents any of ... dd, d, m, (P), M, A, AA ...). | ||
Using the fact that 64/63 is represented by a single step in 9edo, it is left as an exercise for the reader to prove that 9edo supports Negri temperament (by replacing some names with sub and super prefixed names to arrive at Negri[9] 4|4). | |||
The primary interval names for Augmented[9] 1|1 (3) are well-ordered. | The primary interval names for Augmented[9] 1|1 (3) are well-ordered. | ||
Mavila[16] 8|7 can be writtten | Mavila[16] 8|7 can be writtten | ||
P1 | P1 d1 M2 m2 M3 m3 A4 P4 A5 P5 d5 M6 m6 M7 m7 A8 P8. | ||
The enharmonic equivalences for 16edo can be generated by: M=Sm=sm or m=sM=SM | |||
This leads us to our primary well-ordered interval name set for 16edo: | |||
P1 | P1 S1 Sm2 sM2 Sm3 sM3 s4 P4 4-5 P5 S5 Sm6 sM6 Sm7 sM7 s8 P8, | ||
wherein we can see that it supports Diminished temperament. | wherein we can see that it supports Diminished temperament. | ||
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P1 d1 A2 M2 m2 A3 M3 m3 d3 A4 P4 d4 A5 P5 d5 A6 M6 m6 d6 M7 m7 d7 A8 P8 | P1 d1 A2 M2 m2 A3 M3 m3 d3 A4 P4 d4 A5 P5 d5 A6 M6 m6 d6 M7 m7 d7 A8 P8 | ||
And the primary well-ordered interval names for [[23edo]] are appear as: | |||
P1 | P1 S1 1-2 M2 m2 2-3 M3 m3 3-4 A4 P4 d4 A5 P5 d5 5-6 M6 m6 6-7 M7 m7 7-8 d8 P8 | ||
=== [[Father]] === | === [[Father]] === | ||
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[[Blackjack|Miracle[21]]] 10|10: P1 S1 Sm2 N2 SM2 sm3 N3 sM3 s4 P4 Sd5 sA4 P5 S5 Sm6 N6 SM6 sm7 N7 sM7 s8 P8, | [[Blackjack|Miracle[21]]] 10|10: P1 S1 Sm2 N2 SM2 sm3 N3 sM3 s4 P4 Sd5 sA4 P5 S5 Sm6 N6 SM6 sm7 N7 sM7 s8 P8, | ||
the largest MOS scale we have attempted yet to write. S1 in this scale is 64/63. We could maybe guess this from the presence of S5, but it is not obvious. If we need to make it clear when we are referring to small/supra, we can write their short-hand instead as 'sl' for 'small' and ' | the largest MOS scale we have attempted yet to write. S1 in this scale is 64/63. We could maybe guess this from the presence of S5, but it is not obvious. If we need to make it clear when we are referring to small/supra, we can write their short-hand instead as 'sl' for 'small' and 'Sa' for supra. Miracle[21] would then be re-written: | ||
P1 S1 | P1 S1 Sam2 N2 SM2 sm3 N3 slM3 s4 P4 Sad5 slA4 P5 S5 Sam6 N6 SM6 sm7 N7 slM7 s8 P8, if complete clarity is needed, otherwise if long-form names are provided there is no need. It looks unwieldy to me and so I would avoid it, but it is there as a possibility, if the intervals of Mavila[21] need be written with only 4 letters allowed for each interval name. | ||
Having encountered 11 and 21-note scales now, and haven't not described 11 and 21edo, I will add these here. | Having encountered 11 and 21-note scales now, and haven't not described 11 and 21edo, I will add these here. | ||
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Barbados[9] 4|4: P1 M2 2-3 3-4 P4 P5 5-6 6-7 m7 P8 | Barbados[9] 4|4: P1 M2 2-3 3-4 P4 P5 5-6 6-7 m7 P8 | ||
Blackwood[10] 1|0 (5) | Blackwood[10] 1|0 (5): P1 sM2 M2/m3 sM3 P4 s5 P5 sM6 M6/m7 sM7/s8 P8 | ||
Blackwood[15] 1|1 (5): P1 S1/Sm2 sM2 M2/m3 Sm3 sM3 P4 S4 s5 P5 Sm6 sM6 M6/m7 Sm7 sM7/s8 P8 | |||
Blackwood[15] 1|1 (5): P1 | |||
Diminished[8] 1|0 (4): P1 sM2 Sm3 P4 sA4/Sd5 Sm6 sM6 sM7 P8 | Diminished[8] 1|0 (4): P1 sM2 Sm3 P4 sA4/Sd5 Sm6 sM6 sM7 P8 | ||
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Diminished[12] 1|1 (4): P1 Sm2 sM2 Sm3 sM3 P4 sA4/Sd5 P5 Sm6 sM6 Sm7 sM7 P8 | Diminished[12] 1|1 (4): P1 Sm2 sM2 Sm3 sM3 P4 sA4/Sd5 P5 Sm6 sM6 Sm7 sM7 P8 | ||
Injera[12] 3|2 (2): P1 sm2 M2 sm3 SM3 P4 | Injera[12] 3|2 (2): P1 sm2 M2 sm3 SM3 P4 SA4/sd5 P5 sm6 M6 m7 SM7 P8 | ||
Injera[14] 3|3 (2): P1 sm2 M2 sm3 m3 SM3 P4 | Injera[14] 3|3 (2): P1 sm2 M2 sm3 m3 SM3 P4 SA4/sd5 P5 sm6 M6 SM6 m7 SM7 P8 | ||
Machine[5] 2|2: P1 M2 M3 m6 m7 P8 | Machine[5] 2|2: P1 M2 M3 m6 m7 P8 | ||
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Mavila[9] 4|4: P1 M2 M3 m3 P4 P5 M6 m6 m7 P8 | Mavila[9] 4|4: P1 M2 M3 m3 P4 P5 M6 m6 m7 P8 | ||
Mavila[16] 8|7: P1 | Mavila[16] 8|7: P1 d1 M2 m2 M3 m3 A4 P4 A5 P5 d5 M6 m6 M7 m7 A8 P8 | ||
Meantone[5] 2|2: P1 M2 P4 P5 m7 P8 | Meantone[5] 2|2: P1 M2 P4 P5 m7 P8 | ||
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Tetracot[13] 6|6: P1 N2 sM2 Sm3 N3 P4 S4 s5 P5 N6 sM6 Sm7 N7 P8 | Tetracot[13] 6|6: P1 N2 sM2 Sm3 N3 P4 S4 s5 P5 N6 sM6 Sm7 N7 P8 | ||
== Conclusion == | |||
Using only 'S' and 's' as qualifiers to M, m, P, A and d, along with N and intermediate degrees, a system is developed wherein for most edos below 50 intervals can be systematically named such that for primary interval names, 'S' and 's' raise and lower, respectively, by 1 step of an edo , whilst the intervals of many MOS scales may be consistently named across different tunings, taking the best of both Igliashon Jones' extra diatonic interval names and Sagispeak. One does not need to understand the comma associations to make use of the interval names. While the intervals of some MOS scales may hold consistent names in edos in an Ups and Downs based scheme, there are many common scales that do not in such a system, that do in this one, such as scales of Diminished and Augmented temperament. What's more, the use of neutrals and intermediates leads to quicker recognition of MOS scales that may be supported in edos. |