Class: Coltrane::Theory::ChordQuality

Inherits:
IntervalSequence show all
Includes:
Qualities
Defined in:
lib/coltrane/theory/chord_quality.rb

Overview

It describe the quality of a chord, like maj7 or dim.

Constant Summary

Constants included from Qualities

Qualities::QUALITIES

Instance Attribute Summary collapse

Attributes inherited from IntervalSequence

#intervals

Instance Method Summary collapse

Methods inherited from IntervalSequence

#&, #[], #all, #find, #find_by_distance, #full_names, #has?, #interval_names, #intervals_semitones, #inversion, #inversions, #names, #next_inversion, #notes_for, #previous_inversion, #relative_intervals, #shift, #zero_it

Constructor Details

#initialize(name: nil, notes: nil, bass: nil) ⇒ ChordQuality

Returns a new instance of ChordQuality.



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# File 'lib/coltrane/theory/chord_quality.rb', line 92

def initialize(name: nil, notes: nil, bass: nil)
  if name
    @name = bass.nil? ? name : [name, bass].join('/')
    super(*intervals_from_name(name))
  elsif notes
    super(notes: notes)
    @name = get_name
  else
    raise WrongKeywordsError, '[name:] || [notes:]'
  end
end

Instance Attribute Details

#name ⇒ Object (readonly) Also known as: to_s

Returns the value of attribute name.



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# File 'lib/coltrane/theory/chord_quality.rb', line 8

def name
  @name
end

Instance Method Details

#get_name ⇒ Object 



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# File 'lib/coltrane/theory/chord_quality.rb', line 77

def get_name
  find_chord(retrieve_chord_intervals.compact) ||
    find_chord(retrieve_chord_intervals(sus2_sequence).compact) ||
    find_chord(retrieve_chord_intervals(sus4_sequence).compact) ||
    raise(ChordNotFoundError)
end

#suspension_type ⇒ Object 



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# File 'lib/coltrane/theory/chord_quality.rb', line 84

def suspension_type
  if has_major_second?
    'sus2'
  else has_fourth?
       'sus4'
  end
end