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Scale 1973: "Spanish Octamode 6th Rotation"

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

Western: Spanish Octamode 6th Rotation

Zeitler: Zyryllic

Dozenal: MAPIAN

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	{0,2,4,5,7,8,9,10}
Forte Number A code assigned by theorist Alan Forte, for this pitch class set and all of its transpositional (rotation) and inversional (reflection) transformations.	8-22
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: 1469
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.	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.	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.	7
Prime Form Describes if this scale is in prime form, using the Rahn/Ring formula.	no prime: 1391
Deep Scale A deep scale is one where the interval vector has 6 different digits.	no
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, 6, 5, 5, 6, 2]
Interval Spectrum The same as the Interval Vector, but expressed in a syntax used by Howard Hansen.	p⁶m⁵n⁵s⁶d⁴t²
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> = {3,4,5,6} <4> = {5,6,7} <5> = {6,7,8,9} <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.	1.75
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".	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.	(10,59,137)

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
Major Triads	C	{0,4,7}	2	4	2.1
	F	{5,9,0}	3	4	1.9
	A♯	{10,2,5}	2	4	2.1
Minor Triads	dm	{2,5,9}	3	4	1.9
	fm	{5,8,0}	3	4	1.9
	gm	{7,10,2}	2	4	2.3
	am	{9,0,4}	2	4	2.1
Augmented Triads	C+	{0,4,8}	3	4	1.9
Diminished Triads	d°	{2,5,8}	2	4	2.1
Diminished Triads	e°	{4,7,10}	2	4	2.3

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
Radius	4
Self-Centered	yes

Modes

Modes are the rotational transformation of this scale. Scale 1973 can be rotated to make 7 other scales. The 1st mode is itself.

2nd mode: Scale 1517				Spanish Octamode 4th Rotation
3rd mode: Scale 1403				Espla's Scale
4th mode: Scale 2749				Spanish Octamode 1st Rotation
5th mode: Scale 1711				Adonai Malakh
6th mode: Scale 2903				Spanish Octamode 10th Rotation
7th mode: Scale 3499				Hamel
8th mode: Scale 3797				Spanish Octamode 8th Rotation

Prime

The prime form of this scale is Scale 1391

Scale 1391

Aeradyllic

Complement

The octatonic modal family [1973, 1517, 1403, 2749, 1711, 2903, 3499, 3797] (Forte: 8-22) is the complement of the tetratonic modal family [149, 673, 1061, 1289] (Forte: 4-22)

Inverse

The inverse of a scale is a reflection using the root as its axis. The inverse of 1973 is 1469

Scale 1469

Epiryllic

Enantiomorph

Only scales that are chiral will have an enantiomorph. Scale 1973 is chiral, and its enantiomorph is scale 1469

Scale 1469

Epiryllic

Transformations:

T₀	1973	T₀I	1469
T₁	3946	T₁I	2938
T₂	3797	T₂I	1781
T₃	3499	T₃I	3562
T₄	2903	T₄I	3029
T₅	1711	T₅I	1963
T₆	3422	T₆I	3926
T₇	2749	T₇I	3757
T₈	1403	T₈I	3419
T₉	2806	T₉I	2743
T₁₀	1517	T₁₀I	1391
T₁₁	3034	T₁₁I	2782

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 1975				Ionocrygic
Scale 1969				Zorian
Scale 1971				Aerynyllic
Scale 1977				Dagyllic
Scale 1981				Houseini
Scale 1957				Pyrian
Scale 1965				Raga Mukhari
Scale 1941				Aeranian
Scale 2005				Gygyllic
Scale 2037				Sythygic
Scale 1845				Lagian
Scale 1909				Epicryllic
Scale 1717				Mixolydian
Scale 1461				Major-Minor
Scale 949				Mela Mararanjani
Scale 2997				Major Bebop
Scale 4021				Raga Pahadi

This scale analysis was created by Ian Ring, Canadian Composer of works for Piano, and total music theory nerd. All the calculations on this page are done in real time by proprietary software created by Ian Ring. Scale notation is generated by VexFlow and Lilypond, graph visualization by Graphviz, and MIDI playback and audio manipulation by MIDI.js, TiMIDIty, and SOX. 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.