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# Scale 1121: "Guwian" ### 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
Guwian

## Analysis

#### Cardinality

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

4 (tetratonic)

#### Pitch Class Set

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

{0,5,6,10}

#### Forte Number

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

4-16

#### 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: 197

#### Hemitonia

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

1 (unhemitonic)

#### 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.

3

#### Prime Form

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

no
prime: 163

#### 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.

[5, 1, 4, 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.

<1, 1, 0, 1, 2, 1>

#### Interval Spectrum

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

p2msdt

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

#### Spectra Variation

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

2.5

#### 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.

1.366

#### Polygon Perimeter

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

5.182

#### 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, 2, 17)

There are no common triads (major, minor, augmented and diminished) that can be formed using notes in this scale.

## Modes

Modes are the rotational transformation of this scale. Scale 1121 can be rotated to make 3 other scales. The 1st mode is itself.

 2nd mode:Scale 163 Bapian This is the prime mode 3rd mode:Scale 2129 Raga Nigamagamini 4th mode:Scale 389 Cixian

## Prime

The prime form of this scale is Scale 163

 Scale 163 Bapian

## Complement

The tetratonic modal family [1121, 163, 2129, 389] (Forte: 4-16) is the complement of the octatonic modal family [943, 1511, 1949, 2519, 2803, 3307, 3449, 3701] (Forte: 8-16)

## Inverse

The inverse of a scale is a reflection using the root as its axis. The inverse of 1121 is 197

 Scale 197 Bekian

## Enantiomorph

Only scales that are chiral will have an enantiomorph. Scale 1121 is chiral, and its enantiomorph is scale 197

 Scale 197 Bekian

## 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> 1121       T0I <11,0> 197
T1 <1,1> 2242      T1I <11,1> 394
T2 <1,2> 389      T2I <11,2> 788
T3 <1,3> 778      T3I <11,3> 1576
T4 <1,4> 1556      T4I <11,4> 3152
T5 <1,5> 3112      T5I <11,5> 2209
T6 <1,6> 2129      T6I <11,6> 323
T7 <1,7> 163      T7I <11,7> 646
T8 <1,8> 326      T8I <11,8> 1292
T9 <1,9> 652      T9I <11,9> 2584
T10 <1,10> 1304      T10I <11,10> 1073
T11 <1,11> 2608      T11I <11,11> 2146
Abbrev Operation Result Abbrev Operation Result
T0M <5,0> 71      T0MI <7,0> 3137
T1M <5,1> 142      T1MI <7,1> 2179
T2M <5,2> 284      T2MI <7,2> 263
T3M <5,3> 568      T3MI <7,3> 526
T4M <5,4> 1136      T4MI <7,4> 1052
T5M <5,5> 2272      T5MI <7,5> 2104
T6M <5,6> 449      T6MI <7,6> 113
T7M <5,7> 898      T7MI <7,7> 226
T8M <5,8> 1796      T8MI <7,8> 452
T9M <5,9> 3592      T9MI <7,9> 904
T10M <5,10> 3089      T10MI <7,10> 1808
T11M <5,11> 2083      T11MI <7,11> 3616

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 1123 Iwato Scale 1125 Ionaritonic Scale 1129 Raga Jayakauns Scale 1137 Stonitonic Scale 1089 Gocian Scale 1105 Messiaen Truncated Mode 6 Inverse Scale 1057 Sansagari Scale 1185 Genus Primum Inverse Scale 1249 Howian Scale 1377 Insian Scale 1633 Kapian Scale 97 Athian Scale 609 Docian Scale 2145 Messiaen Truncated Mode 5 Inverse Scale 3169 Tupian

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.