Class: Musa::Scales::MixolydianScaleKind Private

Inherits:
ScaleKind show all
Defined in:
lib/musa-dsl/music/scale_kinds/modes/mixolydian_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.

Mixolydian mode (fifth mode of major scale).

MixolydianScaleKind defines the Mixolydian mode, a major mode with a characteristic lowered seventh degree. It's built on the fifth degree of the major scale and has a bluesy, rock quality.

Pitch Structure

7 diatonic degrees plus extended harmony (8th-13th):

Scale Degrees (Roman numerals, uppercase for major):

  • 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): Major sixth (9 semitones)
  • VII (subtonic): Minor seventh (10 semitones) ← CHARACTERISTIC

Key Difference from Major

The VII degree is lowered from 11 semitones (major seventh) to 10 semitones (minor seventh), creating:

  • A bluesy, rock quality
  • The characteristic "Mixolydian color"
  • Natural dominant seventh sound

Musical Character

The Mixolydian mode:

  • Maintains major quality (major third)
  • Has a lowered 7th that removes the leading tone tension
  • Common in rock, blues, funk, and folk music
  • Natural mode for dominant seventh chords

Usage

g_mixolydian = Scales[:et12][440.0][:mixolydian][67]
g_mixolydian.tonic  # G (67)
g_mixolydian.VII    # F (77) - minor seventh (characteristic)

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: 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: 9 },
             { functions: %i[VII _7 subtonic seventh],
pitch: 10 },
             { 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 + 9 }].freeze

Class Method Summary collapse

Constructor Details

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

Class Method Details

.grades ⇒ Integer

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.

Number of diatonic degrees.

Returns:

  • (Integer) —

    7



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# File 'lib/musa-dsl/music/scale_kinds/modes/mixolydian_scale_kind.rb', line 97

def grades
  7
end

.id ⇒ Symbol

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.

Scale kind identifier.

Returns:

  • (Symbol) —

    :mixolydian



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# File 'lib/musa-dsl/music/scale_kinds/modes/mixolydian_scale_kind.rb', line 103

def id
  :mixolydian
end

.pitches ⇒ Array<Hash>

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.

Pitch structure.

Returns:

  • (Array<Hash>) —

    pitch definitions with functions and offsets



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# File 'lib/musa-dsl/music/scale_kinds/modes/mixolydian_scale_kind.rb', line 91

def pitches
  @@pitches
end