Class: HeadMusic::Pitch::EnharmonicEquivalence

Inherits:
Object
  • Object
show all
Defined in:
lib/head_music/pitch/enharmonic_equivalence.rb

Overview

An enharmonic equivalent pitch is the same frequency spelled differently, such as D# and Eb.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pitch) ⇒ EnharmonicEquivalence

Returns a new instance of EnharmonicEquivalence.



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# File 'lib/head_music/pitch/enharmonic_equivalence.rb', line 15

def initialize(pitch)
  @pitch = HeadMusic::Pitch.get(pitch)
end

Instance Attribute Details

#pitch ⇒ Object (readonly)

Returns the value of attribute pitch.



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# File 'lib/head_music/pitch/enharmonic_equivalence.rb', line 11

def pitch
  @pitch
end

Class Method Details

.get(pitch) ⇒ Object 



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# File 'lib/head_music/pitch/enharmonic_equivalence.rb', line 5

def self.get(pitch)
  pitch = HeadMusic::Pitch.get(pitch)
  @enharmonic_equivalences ||= {}
  @enharmonic_equivalences[pitch.to_s] ||= new(pitch)
end

Instance Method Details

#enharmonic_equivalent?(other) ⇒ Boolean Also known as: enharmonic?, equivalent?

Returns:

  • (Boolean) 


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# File 'lib/head_music/pitch/enharmonic_equivalence.rb', line 19

def enharmonic_equivalent?(other)
  other = HeadMusic::Pitch.get(other)
  pitch.midi_note_number == other.midi_note_number && pitch.spelling != other.spelling
end