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Scale 1581: "Raga Bagesri"

Scale 1581: Raga Bagesri, 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 Bagesri
Unknown / Unsorted
Sriranjani
Kapijingla
Jayamanohari
Zeitler
Gyrimic
Dozenal
Jukian

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

{0,2,3,5,9,10}

Forte Number

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

6-Z25

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: 1677

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.

no
prime: 363

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, 4, 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.

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

Interval Spectrum

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

p4m2n3s3d2t

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

Spectra Variation

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

2.333

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.

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.

(12, 9, 55)

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 TriadsF{5,9,0}221
A♯{10,2,5}131.5
Minor Triadsdm{2,5,9}221
Diminished Triads{9,0,3}131.5
Parsimonious Voice Leading Between Common Triads of Scale 1581. Created by Ian Ring ©2019 dm dm F F dm->F A# A# dm->A# F->a°

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 Verticesdm, F
Peripheral Verticesa°, A♯

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.


Diminished: {9, 0, 3}
Major: {10, 2, 5}

Modes

Modes are the rotational transformation of this scale. Scale 1581 can be rotated to make 5 other scales. The 1st mode is itself.

2nd mode:
Scale 1419
Scale 1419: Raga Kashyapi, Ian Ring Music TheoryRaga Kashyapi
3rd mode:
Scale 2757
Scale 2757: Raga Nishadi, Ian Ring Music TheoryRaga Nishadi
4th mode:
Scale 1713
Scale 1713: Raga Khamas, Ian Ring Music TheoryRaga Khamas
5th mode:
Scale 363
Scale 363: Soptimic, Ian Ring Music TheorySoptimicThis is the prime mode
6th mode:
Scale 2229
Scale 2229: Raga Nalinakanti, Ian Ring Music TheoryRaga Nalinakanti

Prime

The prime form of this scale is Scale 363

Scale 363Scale 363: Soptimic, Ian Ring Music TheorySoptimic

Complement

The hexatonic modal family [1581, 1419, 2757, 1713, 363, 2229] (Forte: 6-Z25) is the complement of the hexatonic modal family [663, 741, 1209, 1833, 2379, 3237] (Forte: 6-Z47)

Inverse

The inverse of a scale is a reflection using the root as its axis. The inverse of 1581 is 1677

Scale 1677Scale 1677: Raga Manavi, Ian Ring Music TheoryRaga Manavi

Enantiomorph

Only scales that are chiral will have an enantiomorph. Scale 1581 is chiral, and its enantiomorph is scale 1677

Scale 1677Scale 1677: Raga Manavi, Ian Ring Music TheoryRaga Manavi

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> 1581       T0I <11,0> 1677
T1 <1,1> 3162      T1I <11,1> 3354
T2 <1,2> 2229      T2I <11,2> 2613
T3 <1,3> 363      T3I <11,3> 1131
T4 <1,4> 726      T4I <11,4> 2262
T5 <1,5> 1452      T5I <11,5> 429
T6 <1,6> 2904      T6I <11,6> 858
T7 <1,7> 1713      T7I <11,7> 1716
T8 <1,8> 3426      T8I <11,8> 3432
T9 <1,9> 2757      T9I <11,9> 2769
T10 <1,10> 1419      T10I <11,10> 1443
T11 <1,11> 2838      T11I <11,11> 2886
Abbrev Operation Result Abbrev Operation Result
T0M <5,0> 1551      T0MI <7,0> 3597
T1M <5,1> 3102      T1MI <7,1> 3099
T2M <5,2> 2109      T2MI <7,2> 2103
T3M <5,3> 123      T3MI <7,3> 111
T4M <5,4> 246      T4MI <7,4> 222
T5M <5,5> 492      T5MI <7,5> 444
T6M <5,6> 984      T6MI <7,6> 888
T7M <5,7> 1968      T7MI <7,7> 1776
T8M <5,8> 3936      T8MI <7,8> 3552
T9M <5,9> 3777      T9MI <7,9> 3009
T10M <5,10> 3459      T10MI <7,10> 1923
T11M <5,11> 2823      T11MI <7,11> 3846

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 1583Scale 1583: Salian, Ian Ring Music TheorySalian
Scale 1577Scale 1577: Raga Chandrakauns (Kafi), Ian Ring Music TheoryRaga Chandrakauns (Kafi)
Scale 1579Scale 1579: Sagimic, Ian Ring Music TheorySagimic
Scale 1573Scale 1573: Raga Guhamanohari, Ian Ring Music TheoryRaga Guhamanohari
Scale 1589Scale 1589: Raga Rageshri, Ian Ring Music TheoryRaga Rageshri
Scale 1597Scale 1597: Aeolodian, Ian Ring Music TheoryAeolodian
Scale 1549Scale 1549: Joqian, Ian Ring Music TheoryJoqian
Scale 1565Scale 1565: Jozian, Ian Ring Music TheoryJozian
Scale 1613Scale 1613: Thylimic, Ian Ring Music TheoryThylimic
Scale 1645Scale 1645: Dorian Flat 5, Ian Ring Music TheoryDorian Flat 5
Scale 1709Scale 1709: Dorian, Ian Ring Music TheoryDorian
Scale 1837Scale 1837: Dalian, Ian Ring Music TheoryDalian
Scale 1069Scale 1069: Goqian, Ian Ring Music TheoryGoqian
Scale 1325Scale 1325: Phradimic, Ian Ring Music TheoryPhradimic
Scale 557Scale 557: Raga Abhogi, Ian Ring Music TheoryRaga Abhogi
Scale 2605Scale 2605: Rylimic, Ian Ring Music TheoryRylimic
Scale 3629Scale 3629: Boptian, Ian Ring Music TheoryBoptian

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.