Template:MOS mode degrees/doc

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Parameters

Parameters Required? Description
Scale Signature
Yes (optional on mos pages) The mos's scale signature in the form "xL ys", or for non-octave mosses, "xL ys<p/q>", "xL ys⟨p/q⟩", or "xL ys (p/q-equivalent)". If left blank and used on a mos page, then the page's title will be used.
MOS Prefix
No (optional) If using TAMNAMS mosdegree naming, does the mos have a prefix?
MODMOS Step Pattern
No (optional) Step pattern of a MODMOS.
Mode Names
No (optional) Names for the modes of a mos.

Usage

The typical use of this template is for showing a table of scale degrees for each mode of a mos or modmos, a step pattern that deviates from the true mos pattern. Scale degrees are referred to as mosdegrees and are indexed starting at 0, per TAMNAMS parlance.

{{MOS mode degrees}}

Using a different scale signature

A scale signature different from the page's title can be entered as shown.

{{MOS mode degrees
| Scale Signature=5L 2s}}
Scale degrees of the modes of 5L 2s
UDP Cyclic
order
Step
pattern
Scale degree (diadegree)
0 1 2 3 4 5 6 7
6|0 1 LLLsLLs Perf. Maj. Maj. Aug. Perf. Maj. Maj. Perf.
5|1 5 LLsLLLs Perf. Maj. Maj. Perf. Perf. Maj. Maj. Perf.
4|2 2 LLsLLsL Perf. Maj. Maj. Perf. Perf. Maj. Min. Perf.
3|3 6 LsLLLsL Perf. Maj. Min. Perf. Perf. Maj. Min. Perf.
2|4 3 LsLLsLL Perf. Maj. Min. Perf. Perf. Min. Min. Perf.
1|5 7 sLLLsLL Perf. Min. Min. Perf. Perf. Min. Min. Perf.
0|6 4 sLLsLLL Perf. Min. Min. Perf. Dim. Min. Min. Perf.

Using a different mos prefix

By default, the mos prefix is "mos". For TAMNAMS-named mosses, the mos prefix will be automatically added. For non-TAMNAMS mosses that have prefixes, enter it using the parameter "MOS Prefix", as shown.

{{MOS mode degrees
| Scale Signature=5L 2s
| MOS Prefix=mos}}

Using a modmos's step pattern

The modes of a modified step pattern, or modmos, can be entered instead. This changes the table to display the closest true mos modes, as well as display the modes in rotational order rather than in decreasing modal brightness.

{{MOS mode degrees
| Scale Signature=5L 2s
| MODMOS Step Pattern=LsLLsAs}}
Scale degrees of the modes of 5L 2s (LsLLsAs)
UDP and
alterations
Cyclic
order
Step
pattern
Scale degree (diadegree)
0 1 2 3 4 5 6 7
2|4 M6md 1 LsLLsAs Perf. Maj. Min. Perf. Perf. Min. Maj. Perf.
0|6 M5md 2 sLLsAsL Perf. Min. Min. Perf. Dim. Maj. Min. Perf.
5|1 A4md 3 LLsAsLs Perf. Maj. Maj. Perf. Aug. Maj. Maj. Perf.
3|3 A3md 4 LsAsLsL Perf. Maj. Min. Aug. Perf. Maj. Min. Perf.
1|5 M2md 5 sAsLsLL Perf. Min. Maj. Perf. Perf. Min. Min. Perf.
6|0 A1md 6 AsLsLLs Perf. Aug. Maj. Aug. Perf. Maj. Maj. Perf.
0|6 d3md d6md 7 sLsLLsA Perf. Min. Min. Dim. Dim. Min. Dim. Perf.

Using mode names

The mode names can be entered as shown below. The number of names must exactly match the number of modes, and each mode must be separated with a semicolon.

{{MOS mode degrees
| Scale Signature=4L 3s
| Mode Names=Nerevarine; Vivecan; Lorkhanic; Sothic; Kagrenacan; Almalexian; Dagothic}}
Scale degrees of the modes of 4L 3s
UDP Cyclic
order
Step
pattern
Scale degree (smidegree)
0 1 2 3 4 5 6 7
6|0 1 LLsLsLs Perf. Maj. Aug. Maj. Maj. Perf. Maj. Perf.
5|1 6 LsLLsLs Perf. Maj. Perf. Maj. Maj. Perf. Maj. Perf.
4|2 4 LsLsLLs Perf. Maj. Perf. Maj. Min. Perf. Maj. Perf.
3|3 2 LsLsLsL Perf. Maj. Perf. Maj. Min. Perf. Min. Perf.
2|4 7 sLLsLsL Perf. Min. Perf. Maj. Min. Perf. Min. Perf.
1|5 5 sLsLLsL Perf. Min. Perf. Min. Min. Perf. Min. Perf.
0|6 3 sLsLsLL Perf. Min. Perf. Min. Min. Dim. Min. Perf.

Mode names for 5L 2s and its modmos LLsLsAs are provided by the template automatically.


Scale degrees of the modes of 5L 2s
UDP Cyclic
order
Step
pattern
Scale degree (diadegree)
0 1 2 3 4 5 6 7
6|0 1 LLLsLLs Perf. Maj. Maj. Aug. Perf. Maj. Maj. Perf.
5|1 5 LLsLLLs Perf. Maj. Maj. Perf. Perf. Maj. Maj. Perf.
4|2 2 LLsLLsL Perf. Maj. Maj. Perf. Perf. Maj. Min. Perf.
3|3 6 LsLLLsL Perf. Maj. Min. Perf. Perf. Maj. Min. Perf.
2|4 3 LsLLsLL Perf. Maj. Min. Perf. Perf. Min. Min. Perf.
1|5 7 sLLLsLL Perf. Min. Min. Perf. Perf. Min. Min. Perf.
0|6 4 sLLsLLL Perf. Min. Min. Perf. Dim. Min. Min. Perf.


Scale degrees of the modes of 5L 2s (LsLLsAs)
UDP and
alterations
Cyclic
order
Step
pattern
Scale degree (diadegree)
0 1 2 3 4 5 6 7
2|4 M6md 1 LsLLsAs Perf. Maj. Min. Perf. Perf. Min. Maj. Perf.
0|6 M5md 2 sLLsAsL Perf. Min. Min. Perf. Dim. Maj. Min. Perf.
5|1 A4md 3 LLsAsLs Perf. Maj. Maj. Perf. Aug. Maj. Maj. Perf.
3|3 A3md 4 LsAsLsL Perf. Maj. Min. Aug. Perf. Maj. Min. Perf.
1|5 M2md 5 sAsLsLL Perf. Min. Maj. Perf. Perf. Min. Min. Perf.
6|0 A1md 6 AsLsLLs Perf. Aug. Maj. Aug. Perf. Maj. Maj. Perf.
0|6 d3md d6md 7 sLsLLsA Perf. Min. Min. Dim. Dim. Min. Dim. Perf.

Advanced use

Entering modmosses

The step pattern for a modmos uses the characters L and s, either arranged differently from the true mos pattern or may include the characters A, c, and d. Each character has a value represented in large and small steps. It is recommended to use a step pattern whose value of L's and s's matches that of the true mos pattern. The table below shows the sizes of each supported step type.

Character Case-sensitive? Step name Size in L's and s's
L Yes (uppercase) The large step of a mos L
s No (uppercase or lowercase) The small step of a mos s
c Yes (lowercase) The difference between a large and small step; the interval needed to add to a small step to make it a large step L − s
A Yes (uppercase) An augmented step; a large step plus a chroma 2L − s
d Yes (lowercase) A diminished step (or diesis in some contexts); a small step minus a chroma −L + 2s

As an example, the step pattern "LsLLsAs" is a modmos of 5L 2s, containing 3 large steps, 3 small steps, and one augmented step. The size of an augmented step is equivalent to that of a large step and chroma, and adding a chroma to a small step makes it a large step. In other words, the step pair "sA" is equivalent to that of "LL", since they have the same value in L's and s's, meaning that "LsLLsAs" is equal to 5 large steps and 2 small steps.

Caveats regarding closest-mode search

For each mode of a modmos, the template finds the closest mode, which is the closest mode that has the fewest alterations; that is, whichever mode of the true mos requires the fewest changes to reach a given modmos's mode. If more than one mode can reach the same modmos mode using the same number of alterations, then whichever closest mode is the brightest is selected instead.

This doesn't always produce the mode that one may expect; for example, melodic minor (step pattern LsLLLLs) can be thought of as the Aeolian mode with a natural-6 and natural-7 (or major 5- and 6-mosdegrees, in TAMNAMS parlance), but the template calculates the closest mode to be Dorian (UDP 3|3) with a major 7th (6-mosstep).


Scale degrees of the modes of 5L 2s (LsLLLLs)
UDP and
alterations
Cyclic
order
Step
pattern
Scale degree (diadegree)
0 1 2 3 4 5 6 7
5|1 m2md
3|3 M6md
1 LsLLLLs Perf. Maj. Min. Perf. Perf. Maj. Maj. Perf.
3|3 m1md
1|5 M5md
2 sLLLLsL Perf. Min. Min. Perf. Perf. Maj. Min. Perf.
6|0 A4md 3 LLLLsLs Perf. Maj. Maj. Aug. Aug. Maj. Maj. Perf.
6|0 m6md
4|2 A3md
4 LLLsLsL Perf. Maj. Maj. Aug. Perf. Maj. Min. Perf.
4|2 m5md
2|4 M2md
5 LLsLsLL Perf. Maj. Maj. Perf. Perf. Min. Min. Perf.
2|4 d4md
0|6 M1md
6 LsLsLLL Perf. Maj. Min. Perf. Dim. Min. Min. Perf.
0|6 d3md 7 sLsLLLL Perf. Min. Min. Dim. Dim. Min. Min. Perf.

The use of the brightest mode is a tradeoff between using the brightest mode as a tiebreaker versus the darkest mode.

Comparison of UDP and alterations of LsLLLLs
Brightest mode as tiebreaker Darkest mode as tiebreaker Step pattern Common names Which tiebreaker is correct?
5|1 m2md 3|3 M6md LsLLLLs Aeolian ♮6 ♮7 (Melodic minor) Neither
3|3 m1md 1|5 M5md sLLLLsL Dorian b2 Brightest
6|0 A4md 6|0 A4md LLLLsLs Lydian #5 (Lydian augmented) Brightest
6|0 m6md 4|2 A3md LLLsLsL Lydian b7 (Lydian dominant)} Brightest
4|2 m5md 2|4 M2md LLsLsLL Mixolydian b6 Brightest
2|4 d4md 0|6 M1md LsLsLLL Locrian ♮2 (Half-diminished) Brightest
0|6 d3md 0|6 d3md sLsLLLL Locrian bb4 (Altered dominant, super-locrian) Brightest
Comparison of UDP and alterations of sLLLLLs
Brightest mode as tiebreaker Darkest mode as tiebreaker Step pattern Attested name(s) Which tiebreaker is correct?
5|1 m1md m2md 1|5 M5md M6md sLLLLLs Ionian b2 b3 (Neapolitan major) Brightest
6|0 A4md A5md 6|0 A4md A5md LLLLLss Lydian #5 #6 (Leading whole-tone) Brightest
6|0 A4md m6md 4|2 A3md A4md LLLLssL Lydian #5 b7 (Lydian dominant augmented), Mixolydian #5 #11 Depends on name
6|0 m5md m6md 2|4 M2md A3md LLLssLL Lydian b6 b7, Mixolydian #11 #13 Depends on name
4|2 d4md m5md 0|6 M1md M2md LLssLLL Locrian ♮2 ♮3 (Major locrian), Mixolydian b5 b6 Depends on name
2|4 d3md d4md 0|6 M1md d3md LssLLLL Locrian ♮2 b4 (Semilocrian b4) Darkest
0|6 d2md d3md 0|6 d2md d3md ssLLLLL Locrian bb3 b4 (Superlocrian bb3) Darkest

Names

The names for the modes and degrees are pulled from the following sources:

See also