Class: Tone

Inherits:
Object show all
Defined in:
lib/tone.rb

Overview

a sound to be played.

  • a Chord is made of these.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = nil) ⇒ Tone

args

a Hash containing attributes



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# File 'lib/tone.rb', line 16

def initialize(args = nil)
  @frames = 0
  @wave = Wave.new
  @amp = Fader.new(0.5,0,MathUtils::GR)
  @freq = Fader.new(220,0,MathUtils::GR)
  init_hash(args)
end

Instance Attribute Details

#amp ⇒ Object

Fader.final is relative to Fader.start.



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# File 'lib/tone.rb', line 10

def amp
  @amp
end

#frames ⇒ Object

duration of the tone in seconds.



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# File 'lib/tone.rb', line 5

def frames
  @frames
end

#freq ⇒ Object

Fader.final is relative to Fader.start.



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# File 'lib/tone.rb', line 13

def freq
  @freq
end

#wave ⇒ Object

Wave for one single wave in the tone. (Repeated for #frames)



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# File 'lib/tone.rb', line 7

def wave
  @wave
end

Instance Method Details

#chord(note, name, element) ⇒ Object

element

Element to save the used tones and notes to.



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# File 'lib/tone.rb', line 122

def chord(note, name, element)
  out=Buffer.new
  chrs=Composer.chord_notes note.note, name
  notes_total = chrs.count
  chrs.each_with_index do |v,i|
    ltone = deep_copy
    lamp = 1.0/notes_total # lower vol of each tone
    ltone.amp.start *= lamp # lower vol of each tone
    ltone.amp.final *= lamp # lower range of vol
      # use a reduced amplitude. (by tones in chord).
      # mulitplied by givin amplitude
    realnote = note+v
    ltone.note= realnote # set to right freq
    
    out.push ltone.out(i,notes_total)
    element.add_t ltone
    element.notes.push realnote
  end
  out
end

#detail ⇒ Object 



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# File 'lib/tone.rb', line 113

def detail
  wave.detail
end

#fade ⇒ Object

make it end with an amlitute of 0 (complete fade out).



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# File 'lib/tone.rb', line 208

def fade
  amp.final = -amp.start
  self
end

#freq_final(is_relative = true) ⇒ Object 



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# File 'lib/tone.rb', line 31

def freq_final(is_relative=true)
  return is_relative ? freq.final : freq.start + freq.final
end

#note ⇒ Object

return the note closest to the set frequency



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# File 'lib/tone.rb', line 194

def note
  out = Note.new
  fre = freq.start
  linear_frequency = Math.log(fre/220.0,2.0) + 4
  # puts "linear_frequency #{linear_frequency}"
  out.octave= ( linear_frequency ).floor
  cents = 1200.0 * (linear_frequency - out.octave)
  not_wrap = (cents / 99.0)
  # puts "note no wrap #{not_wrap}"
  out.note = not_wrap.floor % 12
  out
end

#note=(note) ⇒ Object

set #freq based off a Note



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# File 'lib/tone.rb', line 186

def note=(note)
  freq.start = note.freq
end

#note_end=(note) ⇒ Object 



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# File 'lib/tone.rb', line 189

def note_end=(note)
  # freq.final = note.freq
end

#out ⇒ Object

output the WaveData for a full tone (chirp). All sound created flows into this atm.

freq_exp

default 0. 0 means linear. higher means it reachs the frequency at the end of it’s range later.



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# File 'lib/tone.rb', line 145

def out
  # puts "out amp: #{amp.start}"
  buffer_len = frames
  inc_x = 0.0
  data = WaveData.new
  lfreq = freq.start
  log "tone starting with freq #{lfreq}", 4
  lamp = amp.start
  wave_exp = wave.detail.exp
  freq_exp = freq.exp
  amp_exp = amp.exp
  wave_into=0
  while data.dps.count < buffer_len do
    wave_data = wave.out(lfreq, lamp, wave_into)
    data + wave_data
    inc_x += wave_data.count
    x = (inc_x.to_f / buffer_len)

    #freq
    freq_multiplier = x # when exp is off
    #fade exponentially if on.
    freq_multiplier = x ** (1.0 /((1.0/freq_exp)*x)) if freq_exp
    lfreq = freq.start + freq_multiplier*freq.final

    #amp
    amp_multiplier = x # when exp is off
    #fade exponentially if on.
    amp_multiplier = x ** (1.0 /((1.0/amp_exp)*x)) if amp_exp
    lamp = amp.start + amp_multiplier*amp.final

    #wave
    wave_into = x # when exp is off
    #fade exponentially if on.
    wave_into = x ** (1.0 /((1.0/wave_exp)*x)) if wave_exp

  end
  data.fit_to buffer_len
  data
end

#rand_amp_both(max = 0.8, min = 0.0025) ⇒ Object

random amp.



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# File 'lib/tone.rb', line 36

def rand_amp_both(max = 0.8, min = 0.0025)
  upper = max - min
  
  val = rand * upper
  self.amp.start = min + val
  val = rand * val # can't be more
  self.set_amp_final (min + val), false
  self.amp.rand_exp
end

#rand_detail_both(min = 3, max = 512, weight = 2) ⇒ Object

random ammount of detail in a wave. weighted toward lower values weight times.



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# File 'lib/tone.rb', line 47

def rand_detail_both(min = 3, max = 512, weight=2)
  upper = max - min
  
  val = rand * upper
  weight.times {val *= rand}
  self.wave.detail.start= min + val
  val = rand * upper
  weight.times {val *= rand}
  self.wave.detail.final= min + val
#  puts "start detail #{val}"
#  puts "final detail #{val}"
  self.wave.detail.rand_exp
end

#rand_freq(min = 12, max = 20_000) ⇒ Object

random start frequency in range.



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# File 'lib/tone.rb', line 77

def rand_freq(min = 12, max = 20_000) 
  upper = max - min
  val = min + rand*upper
  self.freq.start = val
end

#rand_freq_both(min = 12, max = 20_000) ⇒ Object

random frequencies in range.



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# File 'lib/tone.rb', line 84

def rand_freq_both(min = 12, max = 20_000)  
  upper = max - min

  rand_freq min, max
  val = min + rand*upper # final val
  self.set_freq_final val, false
  self.freq.rand_exp
#  puts "freq.start #{freq.start}"
#  puts "freq.f #{freq.final}"
#  puts "freq.x #{freq.exp}"
end

#rand_sat_both(weight = 2, max = 1.0) ⇒ Object

random ammount of saturation, weighted toward lower values weight times.



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# File 'lib/tone.rb', line 62

def rand_sat_both weight=2, max=1.0
  sat = max
  weight.times {sat *= rand}
  self.saturations.start= sat
  
  sat = max
  weight.times {sat *= rand}
  self.saturations.final= sat
  self.saturations.rand_exp
#  puts "saturations.start #{saturations.start}"
#  puts "saturations.final #{saturations.final}"
#  puts "saturations.x #{saturations.exp}"
end

#saturation=(val) ⇒ Object

set saturation for both start and end



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# File 'lib/tone.rb', line 107

def saturation= val
  wave.saturation= val
end

#saturations ⇒ Object 



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# File 'lib/tone.rb', line 110

def saturations
  wave.saturations
end

#set_amp_final(val, is_relative = true) ⇒ Object

is_relative

false for setting it absolute



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# File 'lib/tone.rb', line 102

def set_amp_final val, is_relative=true
  self.amp.final = is_relative ? val : val - amp.start
end

#set_freq(val) ⇒ Object

set frequency #freq#start



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# File 'lib/tone.rb', line 25

def set_freq (val)
  dif = freq.start - val
  freq.start = val
  set_freq_final freq_final(false) + dif, false
end

#set_freq_final(fq, is_relative = true) ⇒ Object

is_relative

false for setting it absolute



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# File 'lib/tone.rb', line 97

def set_freq_final fq, is_relative=true
  self.freq.final = is_relative ? fq : fq - freq.start
end