Class: Musa::Scales::ChromaticScaleKind Private

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

Chromatic scale kind (all 12 semitones).

ChromaticScaleKind defines the chromatic scale containing all 12 semitones of the octave. It's used as a fallback for chromatic (non-diatonic) notes and for atonal or twelve-tone compositions.

Pitch Structure

Contains 12 pitch classes, one for each semitone:

  • Degrees: _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12
  • Pitches: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 (semitones from root)

Special Properties

  • chromatic?: Returns true (only scale kind with this property)
  • Used automatically when accessing non-diatonic notes in diatonic scales

Usage

chromatic = Scales[:et12][440.0][:chromatic][60]
chromatic._1   # C
chromatic._2   # C#/Db
chromatic._3   # D
# ... all 12 semitones

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: [:_1], pitch: 0 },
{ functions: [:_2], pitch: 1 },
{ functions: [:_3], pitch: 2 },
{ functions: [:_4], pitch: 3 },
{ functions: [:_5], pitch: 4 },
{ functions: [:_6], pitch: 5 },
{ functions: [:_7], pitch: 6 },
{ functions: [:_8], pitch: 7 },
{ functions: [:_9], pitch: 8 },
{ functions: [:_10], pitch: 9 },
{ functions: [:_11], pitch: 10 },
{ functions: [:_12], pitch: 11 }].freeze

Class Method Summary collapse

Constructor Details

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

Class Method Details

.chromatic? ⇒ Boolean

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.

Indicates if this is a chromatic scale.

Returns:

  • (Boolean) —

    true



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# File 'lib/musa-dsl/music/scale_kinds/chromatic_scale_kind.rb', line 71

def chromatic?
  true
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) —

    :chromatic



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# File 'lib/musa-dsl/music/scale_kinds/chromatic_scale_kind.rb', line 65

def id
  :chromatic
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/chromatic_scale_kind.rb', line 59

def pitches
  @@pitches
end