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Scale 2135

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).

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	{0,1,2,4,6,11}
Forte Number A code assigned by theorist Allen Forte, for this pitch class set and all of its transpositional (rotation) and inversional (reflection) transformations.	6-9
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: 3395
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.	5
Prime Form Describes if this scale is in prime form, using the Rahn/Ring formula.	no prime: 175
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 Formula Defines the scale as the sequence of intervals between one tone and the next.	[1, 1, 2, 2, 5, 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, 4, 2, 2, 3, 1>
Interval Spectrum The same as the Interval Vector, but expressed in a syntax used by Howard Hanson.	p³m²n²s⁴d³t
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> = {1,2,5} <2> = {2,3,4,6,7} <3> = {3,4,5,7,8,9} <4> = {5,6,8,9,10} <5> = {7,10,11}
Spectra Variation Determined by the Distribution Spectra; this is the sum of all spectrum widths divided by the scale cardinality.	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.	1.866
Polygon Perimeter Perimeter of the polygon described by vertices placed for each tone of the scale dodecimetrically around a unit circle.	5.485
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.	(29, 19, 65)

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 Type	Triad^*	Pitch Classes	Degree	Eccentricity	Closeness Centrality
Minor Triads	bm	{11,2,6}	0	0	0

The following pitch classes are not present in any of the common triads: {0,1,4}

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 2135 can be rotated to make 5 other scales. The 1st mode is itself.

2nd mode: Scale 3115
3rd mode: Scale 3605
4th mode: Scale 1925
5th mode: Scale 1505
6th mode: Scale 175					This is the prime mode

Prime

The prime form of this scale is Scale 175

Scale 175

Complement

The hexatonic modal family [2135, 3115, 3605, 1925, 1505, 175] (Forte: 6-9) is the complement of the hexatonic modal family [175, 1505, 1925, 2135, 3115, 3605] (Forte: 6-9)

Inverse

The inverse of a scale is a reflection using the root as its axis. The inverse of 2135 is 3395

Scale 3395

Enantiomorph

Only scales that are chiral will have an enantiomorph. Scale 2135 is chiral, and its enantiomorph is scale 3395

Scale 3395

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>	2135	T₀I	<11,0>	3395
T₁	<1,1>	175	T₁I	<11,1>	2695
T₂	<1,2>	350	T₂I	<11,2>	1295
T₃	<1,3>	700	T₃I	<11,3>	2590
T₄	<1,4>	1400	T₄I	<11,4>	1085
T₅	<1,5>	2800	T₅I	<11,5>	2170
T₆	<1,6>	1505	T₆I	<11,6>	245
T₇	<1,7>	3010	T₇I	<11,7>	490
T₈	<1,8>	1925	T₈I	<11,8>	980
T₉	<1,9>	3850	T₉I	<11,9>	1960
T₁₀	<1,10>	3605	T₁₀I	<11,10>	3920
T₁₁	<1,11>	3115	T₁₁I	<11,11>	3745
Abbrev	Operation	Result	Abbrev	Operation	Result
T₀M	<5,0>	1505	T₀MI	<7,0>	245
T₁M	<5,1>	3010	T₁MI	<7,1>	490
T₂M	<5,2>	1925	T₂MI	<7,2>	980
T₃M	<5,3>	3850	T₃MI	<7,3>	1960
T₄M	<5,4>	3605	T₄MI	<7,4>	3920
T₅M	<5,5>	3115	T₅MI	<7,5>	3745
T₆M	<5,6>	2135	T₆MI	<7,6>	3395
T₇M	<5,7>	175	T₇MI	<7,7>	2695
T₈M	<5,8>	350	T₈MI	<7,8>	1295
T₉M	<5,9>	700	T₉MI	<7,9>	2590
T₁₀M	<5,10>	1400	T₁₀MI	<7,10>	1085
T₁₁M	<5,11>	2800	T₁₁MI	<7,11>	2170

The transformations that map this set to itself are: T₀, T₆M

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 2133				Raga Kumurdaki
Scale 2131
Scale 2139
Scale 2143
Scale 2119
Scale 2127
Scale 2151
Scale 2167
Scale 2071
Scale 2103
Scale 2199				Dyptimic
Scale 2263				Lycrian
Scale 2391				Molian
Scale 2647				Dadian
Scale 3159				Stocrian
Scale 87
Scale 1111				Sycrimic

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.