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Scale 427: "Raga Suddha Simantini"

Scale 427: Raga Suddha Simantini, 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

Carnatic
Raga Suddha Simantini
Zeitler
Zothimic
Dozenal
Covian

Analysis

Cardinality

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

6 (hexatonic)

Pitch Class Set

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

{0,1,3,5,7,8}

Forte Number

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

6-Z26

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.

[4]

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.

no

Hemitonia

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

2 (dihemitonic)

Cohemitonia

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

0 (ancohemitonic)

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.

5

Prime Form

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

yes

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.

[1, 2, 2, 2, 1, 4]

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.

<2, 3, 2, 3, 4, 1>

Interval Spectrum

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

p4m3n2s3d2t

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

Spectra Variation

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

2

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.

no

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.

2.232

Polygon Perimeter

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

5.767

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.

[8]

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.

(4, 12, 58)

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 TriadsC♯{1,5,8}131.5
G♯{8,0,3}221
Minor Triadscm{0,3,7}131.5
fm{5,8,0}221
Parsimonious Voice Leading Between Common Triads of Scale 427. Created by Ian Ring ©2019 cm cm G# G# cm->G# C# C# fm fm C#->fm fm->G#

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.

Diameter3
Radius2
Self-Centeredno
Central Verticesfm, G♯
Peripheral Verticescm, C♯

Triad Polychords

Also known as Bi-Triadic Hexatonics (a term coined by mDecks), and related to Generic Modality Compression (a method for guitar by Mick Goodrick and Tim Miller), these are two common triads that when combined use all the tones in this scale.

There is 1 way that this hexatonic scale can be split into two common triads.


Minor: {0, 3, 7}
Major: {1, 5, 8}

Modes

Modes are the rotational transformation of this scale. Scale 427 can be rotated to make 5 other scales. The 1st mode is itself.

2nd mode:
Scale 2261
Scale 2261: Raga Caturangini, Ian Ring Music TheoryRaga Caturangini
3rd mode:
Scale 1589
Scale 1589: Raga Rageshri, Ian Ring Music TheoryRaga Rageshri
4th mode:
Scale 1421
Scale 1421: Raga Trimurti, Ian Ring Music TheoryRaga Trimurti
5th mode:
Scale 1379
Scale 1379: Kycrimic, Ian Ring Music TheoryKycrimic
6th mode:
Scale 2737
Scale 2737: Raga Hari Nata, Ian Ring Music TheoryRaga Hari Nata

Prime

This is the prime form of this scale.

Complement

The hexatonic modal family [427, 2261, 1589, 1421, 1379, 2737] (Forte: 6-Z26) is the complement of the hexatonic modal family [679, 917, 1253, 1337, 2387, 3241] (Forte: 6-Z48)

Inverse

The inverse of a scale is a reflection using the root as its axis. The inverse of 427 is 2737

Scale 2737Scale 2737: Raga Hari Nata, Ian Ring Music TheoryRaga Hari Nata

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> 427       T0I <11,0> 2737
T1 <1,1> 854      T1I <11,1> 1379
T2 <1,2> 1708      T2I <11,2> 2758
T3 <1,3> 3416      T3I <11,3> 1421
T4 <1,4> 2737      T4I <11,4> 2842
T5 <1,5> 1379      T5I <11,5> 1589
T6 <1,6> 2758      T6I <11,6> 3178
T7 <1,7> 1421      T7I <11,7> 2261
T8 <1,8> 2842      T8I <11,8> 427
T9 <1,9> 1589      T9I <11,9> 854
T10 <1,10> 3178      T10I <11,10> 1708
T11 <1,11> 2261      T11I <11,11> 3416
Abbrev Operation Result Abbrev Operation Result
T0M <5,0> 2107      T0MI <7,0> 2947
T1M <5,1> 119      T1MI <7,1> 1799
T2M <5,2> 238      T2MI <7,2> 3598
T3M <5,3> 476      T3MI <7,3> 3101
T4M <5,4> 952      T4MI <7,4> 2107
T5M <5,5> 1904      T5MI <7,5> 119
T6M <5,6> 3808      T6MI <7,6> 238
T7M <5,7> 3521      T7MI <7,7> 476
T8M <5,8> 2947      T8MI <7,8> 952
T9M <5,9> 1799      T9MI <7,9> 1904
T10M <5,10> 3598      T10MI <7,10> 3808
T11M <5,11> 3101      T11MI <7,11> 3521

The transformations that map this set to itself are: T0, T8I

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 425Scale 425: Raga Kokil Pancham, Ian Ring Music TheoryRaga Kokil Pancham
Scale 429Scale 429: Koptimic, Ian Ring Music TheoryKoptimic
Scale 431Scale 431: Epyrian, Ian Ring Music TheoryEpyrian
Scale 419Scale 419: Hon-kumoi-joshi, Ian Ring Music TheoryHon-kumoi-joshi
Scale 423Scale 423: Sogimic, Ian Ring Music TheorySogimic
Scale 435Scale 435: Raga Purna Pancama, Ian Ring Music TheoryRaga Purna Pancama
Scale 443Scale 443: Kothian, Ian Ring Music TheoryKothian
Scale 395Scale 395: Phrygian Pentatonic, Ian Ring Music TheoryPhrygian Pentatonic
Scale 411Scale 411: Lygimic, Ian Ring Music TheoryLygimic
Scale 459Scale 459: Zaptimic, Ian Ring Music TheoryZaptimic
Scale 491Scale 491: Aeolyrian, Ian Ring Music TheoryAeolyrian
Scale 299Scale 299: Raga Chitthakarshini, Ian Ring Music TheoryRaga Chitthakarshini
Scale 363Scale 363: Soptimic, Ian Ring Music TheorySoptimic
Scale 171Scale 171: Pruian, Ian Ring Music TheoryPruian
Scale 683Scale 683: Stogimic, Ian Ring Music TheoryStogimic
Scale 939Scale 939: Mela Senavati, Ian Ring Music TheoryMela Senavati
Scale 1451Scale 1451: Phrygian, Ian Ring Music TheoryPhrygian
Scale 2475Scale 2475: Neapolitan Minor, Ian Ring Music TheoryNeapolitan Minor

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.