Class: Musa::Scales::NeapolitanMinorScaleKind Private

Inherits:
ScaleKind show all
Defined in:
lib/musa-dsl/music/scale_kinds/ethnic/neapolitan_minor_scale_kind.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Neapolitan minor scale kind.

NeapolitanMinorScaleKind defines the Neapolitan minor scale, a harmonic minor scale with a lowered second degree, named after the Neapolitan school of opera in the 18th century.

Pitch Structure

7 diatonic degrees plus extended harmony:

Scale Degrees (lowercase for minor quality):

  • i (tonic): Root (0 semitones)
  • ii (supertonic): Minor second (1 semitone) ← NEAPOLITAN (b2)
  • iii (mediant): Minor third (3 semitones)
  • iv (subdominant): Perfect fourth (5 semitones)
  • v (dominant): Perfect fifth (7 semitones)
  • vi (submediant): Minor sixth (8 semitones)
  • vii (leading): Major seventh (11 semitones)

Relationship to Harmonic Minor

Neapolitan minor = Harmonic minor with lowered 2nd

Musical Character

The Neapolitan minor scale:

  • Dark, dramatic, operatic
  • The Neapolitan sixth chord (bII) is characteristic
  • Used in classical and film music
  • Strong resolution tendency to tonic

Usage

a_neap_min = Scales[:et12][440.0][:neapolitan_minor][69]
a_neap_min.tonic  # A (69)
a_neap_min.ii     # Bb (70) - minor second (Neapolitan)
a_neap_min.vii    # G# (80) - leading tone

See Also:

Constant Summary collapse

@@pitches =

This classvariable is part of a private API. You should avoid using this classvariable if possible, as it may be removed or be changed in the future. 

[{ functions: %i[i _1 tonic first],
pitch: 0 },
             { functions: %i[ii _2 supertonic second],
pitch: 1 },
             { functions: %i[iii _3 mediant third],
pitch: 3 },
             { functions: %i[iv _4 subdominant fourth],
pitch: 5 },
             { functions: %i[v _5 dominant fifth],
pitch: 7 },
             { functions: %i[vi _6 submediant sixth],
pitch: 8 },
             { functions: %i[vii _7 leading seventh],
pitch: 11 },
             { functions: %i[viii _8 eighth],
pitch: 12 },
             { functions: %i[ix _9 ninth],
pitch: 12 + 1 },
             { functions: %i[x _10 tenth],
pitch: 12 + 3 },
             { functions: %i[xi _11 eleventh],
pitch: 12 + 5 },
             { functions: %i[xii _12 twelfth],
pitch: 12 + 7 },
             { functions: %i[xiii _13 thirteenth],
pitch: 12 + 8 }].freeze

Class Method Summary collapse

Constructor Details

This class inherits a constructor from Musa::Scales::ScaleKind

Class Method Details

.grades ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/musa-dsl/music/scale_kinds/ethnic/neapolitan_minor_scale_kind.rb', line 89

def grades
  7
end

.id ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/musa-dsl/music/scale_kinds/ethnic/neapolitan_minor_scale_kind.rb', line 93

def id
  :neapolitan_minor
end

.pitches ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/musa-dsl/music/scale_kinds/ethnic/neapolitan_minor_scale_kind.rb', line 85

def pitches
  @@pitches
end