Class: Musa::Scales::HarmonicMajorScaleKind

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

Overview

Harmonic major scale kind.

HarmonicMajorScaleKind defines the harmonic major scale, a major scale with a lowered sixth degree. It creates an augmented second between the sixth and seventh degrees, similar to harmonic minor but in a major context.

Pitch Structure

7 diatonic degrees plus extended harmony:

Scale Degrees (uppercase for major quality):

  • I (tonic): Root (0 semitones)
  • II (supertonic): Major second (2 semitones)
  • III (mediant): Major third (4 semitones)
  • IV (subdominant): Perfect fourth (5 semitones)
  • V (dominant): Perfect fifth (7 semitones)
  • VI (submediant): Minor sixth (8 semitones) ← CHARACTERISTIC (b6)
  • VII (leading): Major seventh (11 semitones)

Key Feature

The augmented second between b6 and natural 7 creates an exotic interval similar to harmonic minor, but in a major key context.

Musical Character

The harmonic major scale:

  • Major quality with exotic coloring
  • Augmented second (b6 to 7) adds drama
  • Used in classical, jazz, and film music
  • Creates unique diminished chord on bVI

Usage

c_harm_maj = Scales[:et12][440.0][:major_harmonic][60]
c_harm_maj.tonic    # C (60)
c_harm_maj.VI       # Ab (68) - minor sixth
c_harm_maj.leading  # B (71) - major seventh
# Ab to B = augmented second (3 semitones)

See Also:

Constant Summary collapse

@@pitches = 
[{ functions: %i[I _1 tonic first],
pitch: 0 },
             { functions: %i[II _2 supertonic second],
pitch: 2 },
             { functions: %i[III _3 mediant third],
pitch: 4 },
             { 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 + 2 },
             { functions: %i[X _10 tenth],
pitch: 12 + 4 },
             { 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 



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# File 'lib/musa-dsl/music/scale_kinds/harmonic_major/harmonic_major_scale_kind.rb', line 92

def grades
  7
end

.id ⇒ Object 



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# File 'lib/musa-dsl/music/scale_kinds/harmonic_major/harmonic_major_scale_kind.rb', line 96

def id
  :major_harmonic
end

.pitches ⇒ Object 



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# File 'lib/musa-dsl/music/scale_kinds/harmonic_major/harmonic_major_scale_kind.rb', line 88

def pitches
  @@pitches
end