Class: Musa::Scales::NeapolitanMajorScaleKind

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

Overview

Neapolitan major scale kind.

NeapolitanMajorScaleKind defines the Neapolitan major scale, a major scale with a lowered second degree, combining the Neapolitan coloring with a brighter major upper structure.

Pitch Structure

7 diatonic degrees plus extended harmony:

Scale Degrees (uppercase for major 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): Major sixth (9 semitones)
  • VII (leading): Major seventh (11 semitones)

Relationship to Melodic Minor

Neapolitan major = Melodic minor with lowered 2nd

Musical Character

The Neapolitan major scale:

  • Exotic but brighter than Neapolitan minor
  • Combines Phrygian darkness with major brightness
  • Used in classical and contemporary music
  • Unique harmonic possibilities

Usage

c_neap_maj = Scales[:et12][440.0][:neapolitan_major][60]
c_neap_maj.tonic  # C (60)
c_neap_maj.II     # Db (61) - minor second (Neapolitan)
c_neap_maj.VI     # A (69) - major sixth
c_neap_maj.VII    # B (71) - leading tone

See Also:

Constant Summary collapse

@@pitches = 
[{ 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: 9 },
             { 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 + 9 }].freeze

Class Method Summary collapse

Constructor Details

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

Class Method Details

.grades ⇒ Object 



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# File 'lib/musa-dsl/music/scale_kinds/ethnic/neapolitan_major_scale_kind.rb', line 90

def grades
  7
end

.id ⇒ Object 



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# File 'lib/musa-dsl/music/scale_kinds/ethnic/neapolitan_major_scale_kind.rb', line 94

def id
  :neapolitan_major
end

.pitches ⇒ Object 



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# File 'lib/musa-dsl/music/scale_kinds/ethnic/neapolitan_major_scale_kind.rb', line 86

def pitches
  @@pitches
end