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Scale 2029: "Kiourdi"

Scale 2029: Kiourdi, Ian Ring Music Theory

Bracelet Diagram

The bracelet shows tones that are in this scale, starting from the top (12 o'clock), going clockwise in ascending semitones. The "i" icon marks imperfect tones that do not have a tone a fifth above. Dotted lines indicate axes of symmetry.

Tonnetz Diagram

Tonnetz diagrams are popular in Neo-Riemannian theory. Notes are arranged in a lattice where perfect 5th intervals are from left to right, major third are northeast, and major 6th intervals are northwest. Other directions are inverse of their opposite. This diagram helps to visualize common triads (they're triangles) and circle-of-fifth relationships (horizontal lines).

Common Names

Modern Greek
Kiourdi
Dozenal
Ishian
Zeitler
Mathygic

Analysis

Cardinality

Cardinality is the count of how many pitches are in the scale.

9 (enneatonic)

Pitch Class Set

The tones in this scale, expressed as numbers from 0 to 11

{0,2,3,5,6,7,8,9,10}

Forte Number

A code assigned by theorist Allen Forte, for this pitch class set and all of its transpositional (rotation) and inversional (reflection) transformations.

9-7

Rotational Symmetry

Some scales have rotational symmetry, sometimes known as "limited transposition". If there are any rotational symmetries, these are the intervals of periodicity.

none

Reflection Axes

If a scale has an axis of reflective symmetry, then it can transform into itself by inversion. It also implies that the scale has Ridge Tones. Notably an axis of reflection can occur directly on a tone or half way between two tones.

none

Palindromicity

A palindromic scale has the same pattern of intervals both ascending and descending.

no

Chirality

A chiral scale can not be transformed into its inverse by rotation. If a scale is chiral, then it has an enantiomorph.

yes
enantiomorph: 1789

Hemitonia

A hemitone is two tones separated by a semitone interval. Hemitonia describes how many such hemitones exist.

6 (multihemitonic)

Cohemitonia

A cohemitone is an instance of two adjacent hemitones. Cohemitonia describes how many such cohemitones exist.

4 (multicohemitonic)

Imperfections

An imperfection is a tone which does not have a perfect fifth above it in the scale. This value is the quantity of imperfections in this scale.

2

Modes

Modes are the rotational transformations of this scale. This number does not include the scale itself, so the number is usually one less than its cardinality; unless there are rotational symmetries then there are even fewer modes.

8

Prime Form

Describes if this scale is in prime form, using the Rahn/Ring formula.

no
prime: 1471

Generator

Indicates if the scale can be constructed using a generator, and an origin.

none

Deep Scale

A deep scale is one where the interval vector has 6 different digits.

no

Interval Structure

Defines the scale as the sequence of intervals between one tone and the next.

[2, 1, 2, 1, 1, 1, 1, 1, 2]

Interval Vector

Describes the intervallic content of the scale, read from left to right as the number of occurences of each interval size from semitone, up to six semitones.

<6, 7, 7, 6, 7, 3>

Interval Spectrum

The same as the Interval Vector, but expressed in a syntax used by Howard Hanson.

p7m6n7s7d6t3

Distribution Spectra

Describes the specific interval sizes that exist for each generic interval size. Each generic <g> has a spectrum {n,...}. The Spectrum Width is the difference between the highest and lowest values in each spectrum.

<1> = {1,2}
<2> = {2,3,4}
<3> = {3,4,5}
<4> = {4,5,6,7}
<5> = {5,6,7,8}
<6> = {7,8,9}
<7> = {8,9,10}
<8> = {10,11}

Spectra Variation

Determined by the Distribution Spectra; this is the sum of all spectrum widths divided by the scale cardinality.

1.778

Maximally Even

A scale is maximally even if the tones are optimally spaced apart from each other.

no

Maximal Area Set

A scale is a maximal area set if a polygon described by vertices dodecimetrically placed around a circle produces the maximal interior area for scales of the same cardinality. All maximally even sets have maximal area, but not all maximal area sets are maximally even.

yes

Interior Area

Area of the polygon described by vertices placed for each tone of the scale dodecimetrically around a unit circle, ie a circle with radius of 1.

2.799

Polygon Perimeter

Perimeter of the polygon described by vertices placed for each tone of the scale dodecimetrically around a unit circle.

6.106

Myhill Property

A scale has Myhill Property if the Interval Spectra has exactly two specific intervals for every generic interval.

no

Balanced

A scale is balanced if the distribution of its tones would satisfy the "centrifuge problem", ie are placed such that it would balance on its centre point.

no

Ridge Tones

Ridge Tones are those that appear in all transpositions of a scale upon the members of that scale. Ridge Tones correspond directly with axes of reflective symmetry.

none

Propriety

Also known as Rothenberg Propriety, named after its inventor. Propriety describes whether every specific interval is uniquely mapped to a generic interval. A scale is either "Proper", "Strictly Proper", or "Improper".

Improper

Heteromorphic Profile

Defined by Norman Carey (2002), the heteromorphic profile is an ordered triple of (c, a, d) where c is the number of contradictions, a is the number of ambiguities, and d is the number of differences. When c is zero, the scale is Proper. When a is also zero, the scale is Strictly Proper.

(25, 109, 196)

Common Triads

These are the common triads (major, minor, augmented and diminished) that you can create from members of this scale.

* Pitches are shown with C as the root

Triad TypeTriad*Pitch ClassesDegreeEccentricityCloseness Centrality
Major TriadsD{2,6,9}442.13
D♯{3,7,10}342.44
F{5,9,0}442.31
G♯{8,0,3}342.44
A♯{10,2,5}242.38
Minor Triadscm{0,3,7}342.44
dm{2,5,9}442.19
d♯m{3,6,10}442.31
fm{5,8,0}342.44
gm{7,10,2}242.56
Augmented TriadsD+{2,6,10}442.19
Diminished Triads{0,3,6}242.56
{2,5,8}242.56
d♯°{3,6,9}242.44
f♯°{6,9,0}242.44
{9,0,3}242.56
Parsimonious Voice Leading Between Common Triads of Scale 2029. Created by Ian Ring ©2019 cm cm c°->cm d#m d#m c°->d#m D# D# cm->D# G# G# cm->G# dm dm d°->dm fm fm d°->fm D D dm->D F F dm->F A# A# dm->A# D+ D+ D->D+ d#° d#° D->d#° f#° f#° D->f#° D+->d#m gm gm D+->gm D+->A# d#°->d#m d#m->D# D#->gm fm->F fm->G# F->f#° F->a° G#->a°

view full size

Above is a graph showing opportunities for parsimonious voice leading between triads*. Each line connects two triads that have two common tones, while the third tone changes by one generic scale step.

Diameter4
Radius4
Self-Centeredyes

Modes

Modes are the rotational transformation of this scale. Scale 2029 can be rotated to make 8 other scales. The 1st mode is itself.

2nd mode:
Scale 1531
Scale 1531: Styptygic, Ian Ring Music TheoryStyptygic
3rd mode:
Scale 2813
Scale 2813: Zolygic, Ian Ring Music TheoryZolygic
4th mode:
Scale 1727
Scale 1727: Sydygic, Ian Ring Music TheorySydygic
5th mode:
Scale 2911
Scale 2911: Katygic, Ian Ring Music TheoryKatygic
6th mode:
Scale 3503
Scale 3503: Zyphygic, Ian Ring Music TheoryZyphygic
7th mode:
Scale 3799
Scale 3799: Aeralygic, Ian Ring Music TheoryAeralygic
8th mode:
Scale 3947
Scale 3947: Ryptygic, Ian Ring Music TheoryRyptygic
9th mode:
Scale 4021
Scale 4021: Raga Pahadi, Ian Ring Music TheoryRaga Pahadi

Prime

The prime form of this scale is Scale 1471

Scale 1471Scale 1471: Radygic, Ian Ring Music TheoryRadygic

Complement

The enneatonic modal family [2029, 1531, 2813, 1727, 2911, 3503, 3799, 3947, 4021] (Forte: 9-7) is the complement of the tritonic modal family [37, 641, 1033] (Forte: 3-7)

Inverse

The inverse of a scale is a reflection using the root as its axis. The inverse of 2029 is 1789

Scale 1789Scale 1789: Blues Enneatonic II, Ian Ring Music TheoryBlues Enneatonic II

Enantiomorph

Only scales that are chiral will have an enantiomorph. Scale 2029 is chiral, and its enantiomorph is scale 1789

Scale 1789Scale 1789: Blues Enneatonic II, Ian Ring Music TheoryBlues Enneatonic II

Transformations:

In the abbreviation, the subscript number after "T" is the number of semitones of tranposition, "M" means the pitch class is multiplied by 5, and "I" means the result is inverted. Operation is an identical way to express the same thing; the syntax is <a,b> where each tone of the set x is transformed by the equation y = ax + b

Abbrev Operation Result Abbrev Operation Result
T0 <1,0> 2029       T0I <11,0> 1789
T1 <1,1> 4058      T1I <11,1> 3578
T2 <1,2> 4021      T2I <11,2> 3061
T3 <1,3> 3947      T3I <11,3> 2027
T4 <1,4> 3799      T4I <11,4> 4054
T5 <1,5> 3503      T5I <11,5> 4013
T6 <1,6> 2911      T6I <11,6> 3931
T7 <1,7> 1727      T7I <11,7> 3767
T8 <1,8> 3454      T8I <11,8> 3439
T9 <1,9> 2813      T9I <11,9> 2783
T10 <1,10> 1531      T10I <11,10> 1471
T11 <1,11> 3062      T11I <11,11> 2942
Abbrev Operation Result Abbrev Operation Result
T0M <5,0> 3679      T0MI <7,0> 3919
T1M <5,1> 3263      T1MI <7,1> 3743
T2M <5,2> 2431      T2MI <7,2> 3391
T3M <5,3> 767      T3MI <7,3> 2687
T4M <5,4> 1534      T4MI <7,4> 1279
T5M <5,5> 3068      T5MI <7,5> 2558
T6M <5,6> 2041      T6MI <7,6> 1021
T7M <5,7> 4082      T7MI <7,7> 2042
T8M <5,8> 4069      T8MI <7,8> 4084
T9M <5,9> 4043      T9MI <7,9> 4073
T10M <5,10> 3991      T10MI <7,10> 4051
T11M <5,11> 3887      T11MI <7,11> 4007

The transformations that map this set to itself are: T0

Nearby Scales:

These are other scales that are similar to this one, created by adding a tone, removing a tone, or moving one note up or down a semitone.

Scale 2031Scale 2031: Gadyllian, Ian Ring Music TheoryGadyllian
Scale 2025Scale 2025: Mivian, Ian Ring Music TheoryMivian
Scale 2027Scale 2027: Boptygic, Ian Ring Music TheoryBoptygic
Scale 2021Scale 2021: Katycryllic, Ian Ring Music TheoryKatycryllic
Scale 2037Scale 2037: Sythygic, Ian Ring Music TheorySythygic
Scale 2045Scale 2045: Katogyllian, Ian Ring Music TheoryKatogyllian
Scale 1997Scale 1997: Raga Cintamani, Ian Ring Music TheoryRaga Cintamani
Scale 2013Scale 2013: Mocrygic, Ian Ring Music TheoryMocrygic
Scale 1965Scale 1965: Raga Mukhari, Ian Ring Music TheoryRaga Mukhari
Scale 1901Scale 1901: Ionidyllic, Ian Ring Music TheoryIonidyllic
Scale 1773Scale 1773: Blues Scale II, Ian Ring Music TheoryBlues Scale II
Scale 1517Scale 1517: Sagyllic, Ian Ring Music TheorySagyllic
Scale 1005Scale 1005: Radyllic, Ian Ring Music TheoryRadyllic
Scale 3053Scale 3053: Zycrygic, Ian Ring Music TheoryZycrygic
Scale 4077Scale 4077: Gothyllian, Ian Ring Music TheoryGothyllian

This scale analysis was created by Ian Ring, Canadian Composer of works for Piano, and total music theory nerd. Scale notation generated by VexFlow, graph visualization by Graphviz, and MIDI playback by MIDI.js. All other diagrams and visualizations are © Ian Ring. Some scale names used on this and other pages are ©2005 William Zeitler (http://allthescales.org) used with permission.

Pitch spelling algorithm employed here is adapted from a method by Uzay Bora, Baris Tekin Tezel, and Alper Vahaplar. (An algorithm for spelling the pitches of any musical scale) Contact authors Patent owner: Dokuz Eylül University, Used with Permission. Contact TTO

Tons of background resources contributed to the production of this summary; for a list of these peruse this Bibliography. Special thanks to Richard Repp for helping with technical accuracy, and George Howlett for assistance with the Carnatic ragas.