Class: Juicy::Chord

Inherits:
Object
  • Object
show all
Defined in:
lib/juicy/chord.rb

Constant Summary collapse

QUALITIES = 
{
  :major => [0, 4, 7],
  :minor => [0, 3, 7],
  :diminished => [0, 3, 6],
  :augmented => [0, 4, 8]
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {root: Note.new(name: :C), quality: :major, inversion: 0, context: :none, duration: Duration.new("quarter")}) ⇒ Chord

Returns a new instance of Chord.



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# File 'lib/juicy/chord.rb', line 15

def initialize(options = {root: Note.new(name: :C), quality: :major, inversion: 0, context: :none, duration: Duration.new("quarter")})
  #binding.pry
  @root = (options[:root].kind_of?(Note) ? options[:root] : Note.new(name: options[:root])) || Note.new(name: :C)
  @quality = options[:quality] || :major
  @inversion = options[:inversion] || 0
  @context = options[:context] || :none
  @duration = options[:duration] || Duration.new("quarter")
 @type = :triad
  @notes = [@root + QUALITIES[@quality][0], @root + QUALITIES[@quality][1], @root + QUALITIES[@quality][2]]
end

Instance Attribute Details

#duration ⇒ Object (readonly)

Returns the value of attribute duration.



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# File 'lib/juicy/chord.rb', line 12

def duration
  @duration
end

#how_far_into_the_song_you_are ⇒ Object

Returns the value of attribute how_far_into_the_song_you_are.



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# File 'lib/juicy/chord.rb', line 13

def how_far_into_the_song_you_are
  @how_far_into_the_song_you_are
end

#notes ⇒ Object (readonly)

Returns the value of attribute notes.



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# File 'lib/juicy/chord.rb', line 12

def notes
  @notes
end

#sum_of_queued_chord_durations ⇒ Object

Returns the value of attribute sum_of_queued_chord_durations.



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# File 'lib/juicy/chord.rb', line 13

def sum_of_queued_chord_durations
  @sum_of_queued_chord_durations
end

Instance Method Details

#+(interval) ⇒ Object 



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# File 'lib/juicy/chord.rb', line 71

def +(interval)
  #in the context of a scale, change the base pitch to the new scale
  # degree and the quality to match
  
  #in a context of :none, change the base pitch
  # up a half step times the interval
  if @context.eql? :none
    options = {
      root: (Pitch.new(@root) + interval).frequency,
      quality: @quality,
      inversion: @inversion,
      context: @context
    }
    Chord.new(options)
  end
end

#-(interval) ⇒ Object 



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# File 'lib/juicy/chord.rb', line 88

def -(interval)
  
  if @context.eql? :none
    options = {
      root: (Pitch.new(@root) - interval).frequency,
      quality: @quality,
      inversion: @inversion,
      context: @context
    }
    Chord.new(options)
  end
end

#cycle(direction = :up, amount = 1) ⇒ Object Also known as: invert 



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# File 'lib/juicy/chord.rb', line 101

def cycle(direction = :up, amount = 1)
  #inverts the chord
  # ex. 1, 3, 5 -> cycle(:up, 2) -> 5, 1, 3
  case direction
  when :up
    @inversion = @inversion + amount
  when :down
    @inversion = @inversion - amount
  else
    puts "Unknown Direction"
  end
  puts self.inspect
end

#duration_in_milliseconds(tempo) ⇒ Object 



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# File 'lib/juicy/chord.rb', line 148

def duration_in_milliseconds(tempo)
  @duration.duration_in_milliseconds(tempo)
end

#initial_play_time ⇒ Object 



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# File 'lib/juicy/chord.rb', line 144

def initial_play_time
  @initial_play_time
end

#initial_play_time=(time) ⇒ Object 



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# File 'lib/juicy/chord.rb', line 140

def initial_play_time=(time)
  @initial_play_time = time
end

#inspect ⇒ Object 



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# File 'lib/juicy/chord.rb', line 30

def inspect
  "#{@root.name} #{@quality} Chord, inversion: #{@inversion}"
end

#play(options = {duration: 200, style: :default}) ⇒ Object 



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# File 'lib/juicy/chord.rb', line 34

def play(options = {duration: 200, style: :default})

  #Quick and dirty play function.  Not intended for genuine use

  duration = options[:duration] || 200
  style = options[:style] || :default
  notes = []
  pitches = QUALITIES[@quality]
  inversion = @inversion
  
  while inversion > 0
    pitches = pitches[1..-1] + [(pitches[0]+12)]
    inversion -= 1
  end
  
  pitches.each do |interval|
    notes << Note.new(name: PITCHES.key((PITCHES[@root.name]+interval) % 12))
  end
  
  case style
  when :arpeggiate
    notes.each do |note|
      Thread.new{note.play(duration: duration)}.join
    end
  when :default
    threads = []
    notes.each do |note|
      threads << Thread.new{note.play(duration: duration)}
    end
    threads.each {|t| t.join}
  else
    puts "Unknown style type"
  end
  
  self
end

#play_prepared ⇒ Object 



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# File 'lib/juicy/chord.rb', line 127

def play_prepared
  th = []
  #puts @prepared_notes.inspect
  @prepared_notes.each do |note|
    th << Thread.new {
      note.play_prepared.join
      
      
    }
  end
 th.each {|t| t.join}
end

#prepare(options = {duration: 200, octave: (@octave-Note.default_octave)}) ⇒ Object 



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# File 'lib/juicy/chord.rb', line 117

def prepare(options = {duration: 200, octave: (@octave-Note.default_octave)})
  @prepared_notes = []
  @notes.each do |note|
    options[:duration] = options[:duration] || 200
    options[:octave] = options[:octave] || (note.octave-Note.default_octave)
    
    @prepared_notes << note.prepare(options)
  end
end

#to_s ⇒ Object 



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# File 'lib/juicy/chord.rb', line 26

def to_s
  "chord type: #{@type}, quality: #{@quality}, root: #{@root}, inversion: #{@inversion}"
end