Class: Juicy::Song

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Song

Returns a new instance of Song.



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# File 'lib/juicy/song.rb', line 8

def initialize

  #a song has a key, a mode, voices, tempo, time signature, 
  @voices = []
  @voices << Voice.new
  @key = :A
  @mode = :major
  @tempo = 100.0
  @time_signature = [4,4]
  @measures = []
  4.times {@measures << Measure.new(@time_signature)}

  #  have musical construct yield notes up to a note manager/beat sequencer for each track
  #  chords will eventually have a play style (various types of arpeggiation and such), but
  #  for now they'll all just play all their notes at once for the given duration
  
  @tracks = []

  key = Key.new
  chord_progression = ChordProgression.new(@key, @mode)
  
  @tracks << Track.new(0, demo_melody, @tempo)
  number_of_tracks = 1
  number_of_tracks.times do
    melody = Melody.new(chord_progression, self)
    @tracks << Track.new(melody.initial_play_time, melody, @tempo)
  end
  
end

Instance Attribute Details

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/juicy/song.rb', line 6

def key
  @key
end

#measures ⇒ Object (readonly)

Returns the value of attribute measures.



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# File 'lib/juicy/song.rb', line 6

def measures
  @measures
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/juicy/song.rb', line 6

def mode
  @mode
end

#tempo ⇒ Object (readonly)

Returns the value of attribute tempo.



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# File 'lib/juicy/song.rb', line 6

def tempo
  @tempo
end

Instance Method Details

#beat_length_in_milliseconds ⇒ Object 



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# File 'lib/juicy/song.rb', line 44

def beat_length_in_milliseconds
  60_000.0/@tempo
end

#demo_melody ⇒ Object 



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# File 'lib/juicy/song.rb', line 48

def demo_melody
  @demo_melody ||= [
    Note.new(name: "A", duration: :eighth, octave_change: -1),
    Note.new(name: "E", duration: :eighth, octave_change: -1),
    Note.new(name: "C#", duration: :eighth, octave_change: -1),
    Note.new(name: "E", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "E", duration: :eighth, octave_change: -1),
    Note.new(name: "C#", duration: :eighth, octave_change: -1),
    Note.new(name: "E", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: -1),
    Note.new(name: "E", duration: :eighth, octave_change: -1),
    Note.new(name: "C#", duration: :eighth, octave_change: -1),
    Note.new(name: "E", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "E", duration: :eighth, octave_change: -1),
    Note.new(name: "C#", duration: :eighth, octave_change: -1),
    Note.new(name: "E", duration: :eighth, octave_change: -1),
    
    Note.new(name: "D", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "F#", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "D", duration: :eighth, octave_change: 0),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "F#", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "D", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "F#", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "D", duration: :eighth, octave_change: 0),
    Note.new(name: "A", duration: :eighth, octave_change: 0),
    Note.new(name: "F#", duration: :eighth, octave_change: -1),
    Note.new(name: "A", duration: :eighth, octave_change: 0)
  ]
end

#play ⇒ Object 



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# File 'lib/juicy/song.rb', line 38

def play
  
  Track.play_concurrently(@tracks, @tempo)
  
end