Class: Burn::Fuel::Rom::Note

Inherits:
Object
  • Object
show all
Defined in:
lib/burn/fuel/rom/note.rb

Constant Summary collapse

C =

For music (0..59 are octaves 1-5, 63 note stop)

0
D = 
2
E = 
4
F = 
5
G = 
7
A = 
9
B = 
11
CS = 
11
DS = 
1
ES = 
3
FS = 
4
GS = 
6
AS = 
8
BS = 
10
REST = 
-1
DURATION_BASE =

Empty Rows 128~191 (63steps)

127
SIXTEENTH = 
4 + DURATION_BASE
EIGHTH = 
10 + DURATION_BASE
QUARTER = 
22 + DURATION_BASE
HALF = 
46 + DURATION_BASE
DOTTED_SIXTEENTH = 
7 + DURATION_BASE
DOTTED_EIGHTH = 
16 + DURATION_BASE
DOTTED_QUARTER = 
34 + DURATION_BASE
DOTTED_HALF = 
70 + DURATION_BASE
TRIPLET_SIXTEENTH = 
1 + DURATION_BASE
TRIPLET_EIGHTH = 
4 + DURATION_BASE
TRIPLET_QUARTER = 
10 + DURATION_BASE
TRIPLET_HALF = 
22 + DURATION_BASE
TENUTO = 
1.0
ACCENT = 
0.7
STACCATO = 
0.2

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(duration = :quarter, pitch = :c0, articulation = nil, duration_symbol = nil) ⇒ Note

Returns a new instance of Note.



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# File 'lib/burn/fuel/rom/note.rb', line 47

def initialize(duration=:quarter, pitch=:c0, articulation=nil, duration_symbol=nil)
  @pitch_list = {c:C, bsharp:C,
                 ds:DS, dflat:DS, csharp:DS,
                 d:D, 
                 es:ES, eflat:ES, dsharp:DS,
                 e:E, fs:FS, fflat:FS,
                 f:F, esharp:F,
                 gs:GS, gflat:GS, fsharp:GS,
                 g:G, 
                 as:AS, aflat:AS, gsharp:AS,
                 a:A, 
                 bs:BS, bflat:BS, asharp:BS,
                 b:B, cs:CS, cflat:CS,
                 rest:REST,
                 }

  # Fix pitch first at this early timing
  if !pitch.to_s.match(/(.+)(\d)/).nil? then
    raise Exception.new "pitch #{pitch.to_s} is not defined." if !@pitch_list.keys.include?(Regexp.last_match(1).to_sym)
    @pitch = @pitch_list[Regexp.last_match(1).to_sym]
    if Regexp.last_match(2).to_i <= 4 then
      @octave = Regexp.last_match(2).to_i
    else
      raise Exception.new "Sorry only 0-4 octave range is supported."
    end
  else
    raise Exception.new "pitch #{pitch.to_s} is not defined." if !@pitch_list.keys.include?(pitch)
    @pitch = @pitch_list[pitch]
    @octave = 0
  end
  
  @duration = duration
  @articulation = articulation
  @duration_symbol = duration_symbol
end

Instance Attribute Details

#articulation ⇒ Object

Returns the value of attribute articulation.



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# File 'lib/burn/fuel/rom/note.rb', line 45

def articulation
  @articulation
end

#duration ⇒ Object

Returns the value of attribute duration.



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# File 'lib/burn/fuel/rom/note.rb', line 45

def duration
  @duration
end

#duration_symbol ⇒ Object

Returns the value of attribute duration_symbol.



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# File 'lib/burn/fuel/rom/note.rb', line 45

def duration_symbol
  @duration_symbol
end

Instance Method Details

#generate ⇒ Object 



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# File 'lib/burn/fuel/rom/note.rb', line 83

def generate
  duration = get_actual_duration
  
  result = Array.new
  if @pitch==REST then
    @articuulation = 0
  else
    result << @pitch + 12 * @octave
  end
  
  articulation = Note.const_get(@articulation.upcase) if !@articulation.nil?
  if articulation.nil? then
    result << duration
    result << 63 # note stop
  elsif articulation == TENUTO then
    result << duration + 1
  else
    if (len(duration)*articulation).ceil > 0 then
      result << DURATION_BASE + (len(duration)*articulation).ceil
      result << 63 # note stop
    end
    if (len(duration)*(1.0 - articulation)).floor > 0 then
      result << DURATION_BASE + (len(duration)*(1.0-articulation)).floor
    end
  end
  result
end