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# Scale 2933: "Sizian" ### 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).

Dozenal
Sizian

## Analysis

#### Cardinality

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

8 (octatonic)

#### Pitch Class Set

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

{0,2,4,5,6,8,9,11}

#### Forte Number

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

8-27

#### 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: 1499

#### Hemitonia

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

4 (multihemitonic)

#### Cohemitonia

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

1 (uncohemitonic)

#### 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.

7

#### Prime Form

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

no
prime: 1463

#### 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, 2, 1, 1, 2, 1, 2, 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.

<4, 5, 6, 5, 5, 3>

#### Interval Spectrum

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

p5m5n6s5d4t3

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

#### Spectra Variation

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

1.25

#### 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.

2.732

#### Polygon Perimeter

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

6.071

#### 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".

Proper

#### 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.

(0, 24, 103)

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

E{4,8,11}342.23
F{5,9,0}441.85
fm{5,8,0}441.92
am{9,0,4}242.23
bm{11,2,6}342.23
{5,8,11}242.31
f♯°{6,9,0}242.23
g♯°{8,11,2}242.31
{11,2,5}242.31

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.

Diameter 4 4 yes

## Modes

Modes are the rotational transformation of this scale. Scale 2933 can be rotated to make 7 other scales. The 1st mode is itself.

 2nd mode:Scale 1757 Kunian 3rd mode:Scale 1463 Ugrian This is the prime mode 4th mode:Scale 2779 Shostakovich 5th mode:Scale 3437 Vopian 6th mode:Scale 1883 Lomian 7th mode:Scale 2989 Bebop Minor 8th mode:Scale 1771 Kuwian

## Prime

The prime form of this scale is Scale 1463

 Scale 1463 Ugrian

## Complement

The octatonic modal family [2933, 1757, 1463, 2779, 3437, 1883, 2989, 1771] (Forte: 8-27) is the complement of the tetratonic modal family [293, 593, 649, 1097] (Forte: 4-27)

## Inverse

The inverse of a scale is a reflection using the root as its axis. The inverse of 2933 is 1499

 Scale 1499 Bebop Locrian

## Enantiomorph

Only scales that are chiral will have an enantiomorph. Scale 2933 is chiral, and its enantiomorph is scale 1499

 Scale 1499 Bebop Locrian

## 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> 2933       T0I <11,0> 1499
T1 <1,1> 1771      T1I <11,1> 2998
T2 <1,2> 3542      T2I <11,2> 1901
T3 <1,3> 2989      T3I <11,3> 3802
T4 <1,4> 1883      T4I <11,4> 3509
T5 <1,5> 3766      T5I <11,5> 2923
T6 <1,6> 3437      T6I <11,6> 1751
T7 <1,7> 2779      T7I <11,7> 3502
T8 <1,8> 1463      T8I <11,8> 2909
T9 <1,9> 2926      T9I <11,9> 1723
T10 <1,10> 1757      T10I <11,10> 3446
T11 <1,11> 3514      T11I <11,11> 2797
Abbrev Operation Result Abbrev Operation Result
T0M <5,0> 2003      T0MI <7,0> 2429
T1M <5,1> 4006      T1MI <7,1> 763
T2M <5,2> 3917      T2MI <7,2> 1526
T3M <5,3> 3739      T3MI <7,3> 3052
T4M <5,4> 3383      T4MI <7,4> 2009
T5M <5,5> 2671      T5MI <7,5> 4018
T6M <5,6> 1247      T6MI <7,6> 3941
T7M <5,7> 2494      T7MI <7,7> 3787
T8M <5,8> 893      T8MI <7,8> 3479
T9M <5,9> 1786      T9MI <7,9> 2863
T10M <5,10> 3572      T10MI <7,10> 1631
T11M <5,11> 3049      T11MI <7,11> 3262

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 2935 Modygic Scale 2929 Aeolathian Scale 2931 Zathyllic Scale 2937 Phragyllic Scale 2941 Laptygic Scale 2917 Nohkan Flute Scale Scale 2925 Diminished Scale 2901 Lydian Augmented Scale 2869 Major Augmented Scale 2997 Major Bebop Scale 3061 Apinygic Scale 2677 Thodian Scale 2805 Ishikotsucho Scale 2421 Malian Scale 3445 Messiaen Mode 6 Inverse Scale 3957 Porygic Scale 885 Sathian Scale 1909 Epicryllic

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.