Class: Musa::Scales::DorianB2ScaleKind Private

Inherits:
ScaleKind show all
Defined in:
lib/musa-dsl/music/scale_kinds/melodic_minor/dorian_b2_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.

Dorian b2 scale kind (second mode of melodic minor).

DorianB2ScaleKind defines the Dorian b2 scale (also called Phrygian #6 or Javanese scale), the second mode of the melodic minor scale. It combines the Phrygian's lowered second with the Dorian's raised sixth.

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) ← CHARACTERISTIC (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) ← CHARACTERISTIC (#6)
  • vii (subtonic): Minor seventh (10 semitones)

Relationship to Other Modes

  • Dorian with lowered 2nd
  • Phrygian with raised 6th
  • 2nd mode of melodic minor

Musical Character

The Dorian b2 scale:

  • Exotic, Eastern quality
  • Minor with both Phrygian darkness and Dorian brightness
  • Used over sus4(b9) chords in jazz
  • Common in contemporary jazz and fusion

Usage

d_dor_b2 = Scales[:et12][440.0][:dorian_b2][62]
d_dor_b2.tonic  # D (62)
d_dor_b2.ii     # Eb (63) - minor second
d_dor_b2.vi     # B (71) - major sixth

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: 9 },
             { functions: %i[vii _7 subtonic seventh],
pitch: 10 },
             { 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

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. 



92
93
94
 
# File 'lib/musa-dsl/music/scale_kinds/melodic_minor/dorian_b2_scale_kind.rb', line 92

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. 



96
97
98
 
# File 'lib/musa-dsl/music/scale_kinds/melodic_minor/dorian_b2_scale_kind.rb', line 96

def id
  :dorian_b2
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. 



88
89
90
 
# File 'lib/musa-dsl/music/scale_kinds/melodic_minor/dorian_b2_scale_kind.rb', line 88

def pitches
  @@pitches
end