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Scale 3601: "Wilian"

Scale 3601: Wilian, 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

Dozenal
Wilian

Analysis

Cardinality

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

5 (pentatonic)

Pitch Class Set

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

{0,4,9,10,11}

Forte Number

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

5-5

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: 271

Hemitonia

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

3 (trihemitonic)

Cohemitonia

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

2 (dicohemitonic)

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.

3

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.

4

Prime Form

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

no
prime: 143

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.

[4, 5, 1, 1, 1]

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.

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

Interval Spectrum

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

p2mns2d3t

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

Spectra Variation

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

4.4

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.

1.433

Polygon Perimeter

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

5.217

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.

(17, 3, 32)

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
Minor Triadsam{9,0,4}000

The following pitch classes are not present in any of the common triads: {10,11}

Since there is only one common triad in this scale, there are no opportunities for parsimonious voice leading between triads.

Modes

Modes are the rotational transformation of this scale. Scale 3601 can be rotated to make 4 other scales. The 1st mode is itself.

2nd mode:
Scale 481
Scale 481: Dabian, Ian Ring Music TheoryDabian
3rd mode:
Scale 143
Scale 143: Bacian, Ian Ring Music TheoryBacianThis is the prime mode
4th mode:
Scale 2119
Scale 2119: Mubian, Ian Ring Music TheoryMubian
5th mode:
Scale 3107
Scale 3107: Tician, Ian Ring Music TheoryTician

Prime

The prime form of this scale is Scale 143

Scale 143Scale 143: Bacian, Ian Ring Music TheoryBacian

Complement

The pentatonic modal family [3601, 481, 143, 2119, 3107] (Forte: 5-5) is the complement of the heptatonic modal family [239, 1927, 2167, 3011, 3131, 3553, 3613] (Forte: 7-5)

Inverse

The inverse of a scale is a reflection using the root as its axis. The inverse of 3601 is 271

Scale 271Scale 271: Bodian, Ian Ring Music TheoryBodian

Enantiomorph

Only scales that are chiral will have an enantiomorph. Scale 3601 is chiral, and its enantiomorph is scale 271

Scale 271Scale 271: Bodian, Ian Ring Music TheoryBodian

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> 3601       T0I <11,0> 271
T1 <1,1> 3107      T1I <11,1> 542
T2 <1,2> 2119      T2I <11,2> 1084
T3 <1,3> 143      T3I <11,3> 2168
T4 <1,4> 286      T4I <11,4> 241
T5 <1,5> 572      T5I <11,5> 482
T6 <1,6> 1144      T6I <11,6> 964
T7 <1,7> 2288      T7I <11,7> 1928
T8 <1,8> 481      T8I <11,8> 3856
T9 <1,9> 962      T9I <11,9> 3617
T10 <1,10> 1924      T10I <11,10> 3139
T11 <1,11> 3848      T11I <11,11> 2183
Abbrev Operation Result Abbrev Operation Result
T0M <5,0> 901      T0MI <7,0> 1081
T1M <5,1> 1802      T1MI <7,1> 2162
T2M <5,2> 3604      T2MI <7,2> 229
T3M <5,3> 3113      T3MI <7,3> 458
T4M <5,4> 2131      T4MI <7,4> 916
T5M <5,5> 167      T5MI <7,5> 1832
T6M <5,6> 334      T6MI <7,6> 3664
T7M <5,7> 668      T7MI <7,7> 3233
T8M <5,8> 1336      T8MI <7,8> 2371
T9M <5,9> 2672      T9MI <7,9> 647
T10M <5,10> 1249      T10MI <7,10> 1294
T11M <5,11> 2498      T11MI <7,11> 2588

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 3603Scale 3603: Womian, Ian Ring Music TheoryWomian
Scale 3605Scale 3605: Olkian, Ian Ring Music TheoryOlkian
Scale 3609Scale 3609: Woqian, Ian Ring Music TheoryWoqian
Scale 3585Scale 3585: Tetratonic Chromatic Descending, Ian Ring Music TheoryTetratonic Chromatic Descending
Scale 3593Scale 3593: Wigian, Ian Ring Music TheoryWigian
Scale 3617Scale 3617: Wovian, Ian Ring Music TheoryWovian
Scale 3633Scale 3633: Daptimic, Ian Ring Music TheoryDaptimic
Scale 3665Scale 3665: Stalimic, Ian Ring Music TheoryStalimic
Scale 3729Scale 3729: Starimic, Ian Ring Music TheoryStarimic
Scale 3857Scale 3857: Ponimic, Ian Ring Music TheoryPonimic
Scale 3089Scale 3089: Tirian, Ian Ring Music TheoryTirian
Scale 3345Scale 3345: Zylitonic, Ian Ring Music TheoryZylitonic
Scale 2577Scale 2577: Punian, Ian Ring Music TheoryPunian
Scale 1553Scale 1553: Josian, Ian Ring Music TheoryJosian

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.