16edo: Difference between revisions
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'''16-EDO''' is the [[Equal_division_of_the_octave|equal division of the octave]] into sixteen narrow chromatic semitones each of 75 [[cent|cent]]s exactly. It is not especially good at representing most low-integer musical intervals, but it has a [[7/4|7/4]] which is six cents sharp, and a [[5/4|5/4]] which is eleven cents flat. Four steps of it gives the 300 cent minor third interval, the same of that 12-EDO, giving it four diminished seventh chords exactly like those of [[12edo|12-EDO]], and a diminished triad on each scale step. | '''16-EDO''' is the [[Equal_division_of_the_octave|equal division of the octave]] into sixteen narrow chromatic semitones each of 75 [[cent|cent]]s exactly. It is not especially good at representing most low-integer musical intervals, but it has a [[7/4|7/4]] which is only six cents sharp, and a [[5/4|5/4]] which is only eleven cents flat. Four steps of it gives the 300 cent minor third interval, the same of that 12-EDO, giving it four diminished seventh chords exactly like those of [[12edo|12-EDO]], and a diminished triad on each scale step. | ||
=Intervals= | =Intervals= | ||
16edo can be notated with conventional notation, including the staff, note names, relative notation, etc. in two ways. The first preserves the <u>melodic</u> meaning of sharp/flat, major/minor and aug/dim, in that sharp is higher pitched than flat, and major/aug is wider than minor/dim. The disadvantage to this approach is that conventional interval arithmetic no longer works. e.g. M2 + M2 isn't M3, and D + M2 isn't E. Chord names are different because C - E - G isn't P1 - M3 - P5. | 16edo can be notated with conventional notation, including the staff, note names, relative notation, etc. in two ways. The first preserves the <u>melodic</u> meaning of sharp/flat, major/minor and aug/dim, in that sharp is higher pitched than flat, and major/aug is wider than minor/dim. The disadvantage to this approach is that conventional interval arithmetic no longer works. e.g. M2 + M2 isn't M3, and D + M2 isn't E. Chord names are different because C - E - G isn't P1 - M3 - P5. (But see below in "Chord Names".) | ||
The second approach is to preserve the <u>harmonic</u> meaning of sharp/flat, major/minor and aug/dim, in that the former is always further fifthwards on the chain of fifths than the latter. Sharp is lower in pitch than flat, and major/aug is narrower than minor/dim. While this approach may seem bizarre at first, interval arithmetic and chord names work as usual. Furthermore, conventional 12edo music can be directly translated to 16edo "on the fly". | The second approach is to preserve the <u>harmonic</u> meaning of sharp/flat, major/minor and aug/dim, in that the former is always further fifthwards on the chain of fifths than the latter. Sharp is lower in pitch than flat, and major/aug is narrower than minor/dim. While this approach may seem bizarre at first, interval arithmetic and chord names work as usual. Furthermore, conventional 12edo music can be directly translated to 16edo "on the fly". | ||
Alternatively, one can use Armodue nine-nominal notation; see [[16edo#Hexadecaphonic Notation|below]] | |||
{| class="wikitable" | {| class="wikitable" | ||
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*based on treating 16-EDO as a 2.5.7.13.19.27 subgroup temperament; other approaches are possible. | *based on treating 16-EDO as a 2.5.7.13.19.27 subgroup temperament; other approaches are possible. | ||
=Chord | =Chord Names= | ||
16edo chords can be named using ups and downs. Using harmonic interval names, the names are easy to find, but they bear little relationship to the sound. 4:5:6 is a minor chord and 10:12:15 is a major chord! Using melodic names, the chord names will match the sound, but finding the name is much more complicated | 16edo chords can be named using ups and downs. Using harmonic interval names, the names are easy to find, but they bear little relationship to the sound. 4:5:6 is a minor chord and 10:12:15 is a major chord! Using melodic names, the chord names will match the sound, but finding the name is much more complicated (see below). | ||
{| class="wikitable" | {| class="wikitable" | ||
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| style="text-align:center;" | DM7 | | style="text-align:center;" | DM7 | ||
| style="text-align:center;" | D minor seven | | style="text-align:center;" | D minor seven | ||
|} | |||
See [[Ups and Downs Notation#Chords and Chord Progressions|Ups and Downs Notation - Chords and Chord Progressions]] for more examples. | |||
Using melodic names, interval arithmetic is done using a simple trick: first reverse everything, then perform normal arithmetic, then reverse everything again. Reversing means exchanging major for minor, aug for dim, and sharp for flat. Perfect and natural are unaffected. Examples: | |||
{| class="wikitable" | |||
|initial question | |||
|reverse everything | |||
|do the math | |||
|reverse again | |||
|- | |||
|M2 + M2 | |||
|m2 + m2 | |||
|dim3 | |||
|aug3 | |||
|- | |||
|D to F# | |||
|D to Fb | |||
|dim3 | |||
|aug3 | |||
|- | |||
|D to F | |||
|D to F | |||
|m3 | |||
|M3 | |||
|- | |||
|Eb + m3 | |||
|E# + M3 | |||
|G## | |||
|Gbb | |||
|- | |||
|Eb + P5 | |||
|E# + P5 | |||
|B# | |||
|Bb | |||
|- | |||
|A minor chord | |||
|A major chord | |||
|A C# E | |||
|A Cb E | |||
|- | |||
|Eb major chord | |||
|E# minor chord | |||
|E# G# B# | |||
|Eb Gb Db | |||
|- | |||
|Gm7 = G + m3 + P5 + m7 | |||
|G + M3 + P5 + M7 | |||
|G B D F# | |||
|G B D Fb | |||
|- | |||
|Ab7aug = Ab + M3 + A5 + m7 | |||
|A# + m3 + d5 + M7 | |||
|A# C# E G## | |||
|Ab Cb E Gbb | |||
|- | |||
|what chord is D F A#? | |||
|D F Ab | |||
|D + m3 + d5 | |||
|D + M3 + A5 = Daug | |||
|- | |||
|what chord is C E Gb Bb? | |||
|C E G# B# | |||
|C + M3 + A5 + A7 | |||
|C + m3 + d5 + d7 = Cdim7 | |||
|- | |||
|C major scale = C + M2 + M3 | |||
+ P4 + P5 + M6 + M7 + P8 | |||
|C + m2 + m3 + P4 | |||
+ P5 + m6 + m7 + P8 | |||
|C Db Eb F | |||
G Ab Bb C | |||
|C D# E# F | |||
G A# B# C | |||
|- | |||
|C minor scale = C + M2 + m3 | |||
+ P4 + P5 + m6 + m7 + P8 | |||
|C + m2 + M3 + P4 | |||
+ P5 + M6 + M7 + P8 | |||
|C Db E F | |||
G A B C | |||
|C D# E F | |||
G A B C | |||
|- | |||
|what scale is A B# Cb D | |||
E F Gb A? | |||
|A Bb C# D | |||
E F G# A | |||
|A + m2 + M3 + P4 | |||
+ P5 + m6 + M7 | |||
|A + M2 + m3 + P4 | |||
+ P5 + M6 + m7 = A dorian | |||
|} | |} | ||
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{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
! | | ! | [[Ratio]] | ||
! | Monzo | ! | [[Monzo]] | ||
! | | ! | [[Cent|Cents]] | ||
![[Color notation/Temperament Names|Color Name]] | |||
! | Name 1 | ! | Name 1 | ||
! | Name 2 | ! | Name 2 | ||
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| |<nowiki> | -7 3 1 </nowiki>> | | |<nowiki> | -7 3 1 </nowiki>> | ||
| style="text-align:right;" | 92.18 | | style="text-align:right;" | 92.18 | ||
| style="text-align:center;" |Layobi | |||
| style="text-align:center;" | Major Chroma | | style="text-align:center;" | Major Chroma | ||
| style="text-align:center;" | Major Limma | | style="text-align:center;" | Major Limma | ||
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| |<nowiki> | 3 4 -4 </nowiki>> | | |<nowiki> | 3 4 -4 </nowiki>> | ||
| style="text-align:right;" | 62.57 | | style="text-align:right;" | 62.57 | ||
| style="text-align:center;" |Quadgu | |||
| style="text-align:center;" | Major Diesis | | style="text-align:center;" | Major Diesis | ||
| style="text-align:center;" | Diminished Comma | | style="text-align:center;" | Diminished Comma | ||
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| |<nowiki> | -10 -1 5 </nowiki>> | | |<nowiki> | -10 -1 5 </nowiki>> | ||
| style="text-align:right;" | 29.61 | | style="text-align:right;" | 29.61 | ||
| style="text-align:center;" |Laquinyo | |||
| style="text-align:center;" | Small Diesis | | style="text-align:center;" | Small Diesis | ||
| style="text-align:center;" | Magic Comma | | style="text-align:center;" | Magic Comma | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
|- | |- | ||
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| |<nowiki> | 2 2 -1 -1 </nowiki>> | | |<nowiki> | 2 2 -1 -1 </nowiki>> | ||
| style="text-align:right;" | 48.77 | | style="text-align:right;" | 48.77 | ||
| style="text-align:center;" |Rugu | |||
| style="text-align:center;" | Septimal Quarter Tone | | style="text-align:center;" | Septimal Quarter Tone | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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| |<nowiki> | -9 1 2 1 </nowiki>> | | |<nowiki> | -9 1 2 1 </nowiki>> | ||
| style="text-align:right;" | 43.41 | | style="text-align:right;" | 43.41 | ||
| style="text-align:center;" |Lazoyoyo | |||
| style="text-align:center;" | Avicennma | | style="text-align:center;" | Avicennma | ||
| style="text-align:center;" | Avicenna's Enharmonic Diesis | | style="text-align:center;" | Avicenna's Enharmonic Diesis | ||
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| |<nowiki> | 1 0 2 -2 </nowiki>> | | |<nowiki> | 1 0 2 -2 </nowiki>> | ||
| style="text-align:right;" | 34.98 | | style="text-align:right;" | 34.98 | ||
| style="text-align:center;" |Biruyo | |||
| style="text-align:center;" | Tritonic Diesis | | style="text-align:center;" | Tritonic Diesis | ||
| style="text-align:center;" | Jubilisma | | style="text-align:center;" | Jubilisma | ||
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| |<nowiki> | -9 3 -3 4 </nowiki>> | | |<nowiki> | -9 3 -3 4 </nowiki>> | ||
| style="text-align:right;" | 22.23 | | style="text-align:right;" | 22.23 | ||
| style="text-align:center;" |Laquadzo-atrigu | |||
| style="text-align:center;" | Squalentine | | style="text-align:center;" | Squalentine | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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| |<nowiki> | 0 -2 5 -3 </nowiki>> | | |<nowiki> | 0 -2 5 -3 </nowiki>> | ||
| style="text-align:right;" | 21.18 | | style="text-align:right;" | 21.18 | ||
| style="text-align:center;" |Triru-aquinyo | |||
| style="text-align:center;" | Gariboh | | style="text-align:center;" | Gariboh | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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| |<nowiki> | 1 2 -3 1 </nowiki>> | | |<nowiki> | 1 2 -3 1 </nowiki>> | ||
| style="text-align:right;" | 13.79 | | style="text-align:right;" | 13.79 | ||
| style="text-align:center;" |Zotrigu | |||
| style="text-align:center;" | Septimal Semicomma | | style="text-align:center;" | Septimal Semicomma | ||
| style="text-align:center;" | Starling Comma | | style="text-align:center;" | Starling Comma | ||
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| |<nowiki> | -10 1 0 3 </nowiki>> | | |<nowiki> | -10 1 0 3 </nowiki>> | ||
| style="text-align:right;" | 8.43 | | style="text-align:right;" | 8.43 | ||
| style="text-align:center;" |Latrizo | |||
| style="text-align:center;" | Gamelisma | | style="text-align:center;" | Gamelisma | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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| |<nowiki> | 11 1 -3 -2 </nowiki>> | | |<nowiki> | 11 1 -3 -2 </nowiki>> | ||
| style="text-align:right;" | 5.36 | | style="text-align:right;" | 5.36 | ||
| style="text-align:center;" |Sarurutrigu | |||
| style="text-align:center;" | Porwell | | style="text-align:center;" | Porwell | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
| style="text-align:center;" | | |||
|- | |||
| style="text-align:center;" | | |||
| |<nowiki> | 23 6 -14 </nowiki>> | |||
| style="text-align:right;" | 3.34 | |||
| style="text-align:center;" |Sasepbiru | |||
| style="text-align:center;" | Vishnuzma | |||
| style="text-align:center;" | Semisuper | |||
| style="text-align:center;" | | | style="text-align:center;" | | ||
|- | |- | ||
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| |<nowiki> | -3 -1 -1 0 2 </nowiki>> | | |<nowiki> | -3 -1 -1 0 2 </nowiki>> | ||
| style="text-align:right;" | 14.37 | | style="text-align:right;" | 14.37 | ||
| style="text-align:center;" |Lologu | |||
| style="text-align:center;" | Biyatisma | | style="text-align:center;" | Biyatisma | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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| |<nowiki> | 4 0 -2 -1 1 </nowiki>> | | |<nowiki> | 4 0 -2 -1 1 </nowiki>> | ||
| style="text-align:right;" | 9.86 | | style="text-align:right;" | 9.86 | ||
| style="text-align:center;" |Lorugugu | |||
| style="text-align:center;" | Valinorsma | | style="text-align:center;" | Valinorsma | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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| |<nowiki> | -7 -1 1 1 1 </nowiki>> | | |<nowiki> | -7 -1 1 1 1 </nowiki>> | ||
| style="text-align:right;" | 4.50 | | style="text-align:right;" | 4.50 | ||
| style="text-align:center;" |Lozoyo | |||
| style="text-align:center;" | Keenanisma | | style="text-align:center;" | Keenanisma | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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| |<nowiki> | -3 2 -1 2 -1 </nowiki>> | | |<nowiki> | -3 2 -1 2 -1 </nowiki>> | ||
| style="text-align:right;" | 3.93 | | style="text-align:right;" | 3.93 | ||
| style="text-align:center;" |Luzozogu | |||
| style="text-align:center;" | Werckisma | | style="text-align:center;" | Werckisma | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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| |<nowiki> | -4 -3 2 -1 2 </nowiki>> | | |<nowiki> | -4 -3 2 -1 2 </nowiki>> | ||
| style="text-align:right;" | 0.57 | | style="text-align:right;" | 0.57 | ||
| style="text-align:center;" |Loloruyoyo | |||
| style="text-align:center;" | Lehmerisma | | style="text-align:center;" | Lehmerisma | ||
| style="text-align:center;" | | | style="text-align:center;" | | ||
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|} | |} | ||
= | =Armodue Theory (4-line staff)= | ||
[http://www.armodue.com/ricerche.htm Armodue]: Pierpaolo Beretta's website for his "Armodue" theory for 16edo (esadekaphonic), including compositions. | [http://www.armodue.com/ricerche.htm Armodue]: Pierpaolo Beretta's website for his "Armodue" theory for 16edo (esadekaphonic), including compositions. | ||
Translations of parts of the Armodue pages can be found [[Armodue|here]] on this wiki. | Translations of parts of the Armodue pages can be found [[Armodue|here]] on this wiki. | ||
=Images= | |||
[[File:16edo_wheel_01.png|alt=16edo wheel 01.png|325x325px|16edo wheel 01.png]] | |||
=Books/Literature= | =Books/Literature= |