Class: HeadMusic::Rudiment::DiatonicContext

Inherits:
TonalContext show all
Defined in:
lib/head_music/rudiment/diatonic_context.rb

Overview

Abstract class representing a diatonic tonal context (7-note scale system)

Direct Known Subclasses

Key, Mode

Instance Method Summary collapse

Constructor Details

This class inherits a constructor from HeadMusic::Rudiment::TonalContext

Instance Method Details

#key_signature ⇒ Object 



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# File 'lib/head_music/rudiment/diatonic_context.rb', line 14

def key_signature
  @key_signature ||= HeadMusic::Rudiment::KeySignature.from_scale(scale)
end

#parallel ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/head_music/rudiment/diatonic_context.rb', line 22

def parallel
  raise NotImplementedError, "Subclasses must implement #parallel"
end

#relative ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/head_music/rudiment/diatonic_context.rb', line 18

def relative
  raise NotImplementedError, "Subclasses must implement #relative"
end

#scale ⇒ Object 



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# File 'lib/head_music/rudiment/diatonic_context.rb', line 10

def scale
  @scale ||= HeadMusic::Rudiment::Scale.get(tonic_spelling, scale_type)
end

#scale_type ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/head_music/rudiment/diatonic_context.rb', line 6

def scale_type
  raise NotImplementedError, "Subclasses must implement #scale_type"
end