Screenshot do Sonic Pi com o código que toca um Blues

Programe Música: Sonic Pi

É, oficialmente, meu novo hobby. Sonic Pi é uma ferramenta para criação de música ao vivo através de programação Ruby.

É divertidíssimo! Olha só, um exemplo do Sonic Pi tocando um Dó-Ré-Mi-Fá:

# Do-Re-Mi-Fa

use_synth :pluck

melody = [ :C, :D, :E, :F, 0, :F, :F, 0,
           :C, :D, :C, :D, 0, :D, :D, 0,
           :C, :G, :F, :E, 0, :E, :E, 0,
           :C, :D, :E, :F, 0, :F, :F, 0 ]

melody.each do |note|
  if note != 0 then
    play note
  end
  sleep 0.3
end

Numa tarde de domingo, escrevi o seguinte programa:

# Cyber Piano Blues #1
# Author: Elcio Ferreira
# https://elcio.com.br/

beat = 0.45

chords = [ chord(:A3, :minor7), chord(:D4, :minor7), chord(:A3, :minor7), chord(:A3, :minor7),
           chord(:D4, :minor7), chord(:D4, :minor7), chord(:A3, :minor7), chord(:A3, :minor7),
           chord(:E4, :minor7), chord(:D4, :minor7), chord(:A3, :minor7), chord(:E4, :major7),
           ]

basses = [ :A2, :C3, :E3, :A2, :D3, :F3, :E3, :C3, :E3, :D3, :C3, :E3,
           :A2, :C3, :A2, :C3, :D3, :F3, :A2, :C3, :E3, :A2, :E3, :A2 ]

melody = [[ :A4, :B4, :C5, :E5, :B4, :C5, :E5, :Fs5, :A4, :B4, :C5, :E5, :B4, :C5, :E5, :Fs5,
            :E5, :B4, :C5, :E5, :B4, :C5, :E5, :C5,  :E5, :B4, :C5, :E5, :B4, :C5, :E5, :C5,
            :C5, :E5, :G5, :E5, :C5, :A4, :F4, :C5,  :C5, :E5, :G5, :E5, :C5, :A4, :F4, :C5,
            :A4, :B4, :C5, :E5, :B4, :C5, :E5, :C5,  :A4, :B4, :C5, :E5, :B4, :C5, :E5, :C5,
            :B4, :G4, :B4, :D5, :F5, :D5, :F5, :D5,  :B4, :G4, :B4, :D5, :F5, :D5, :F5, :D5,
            :B4, :C5, :E5, :Fs5,:E5, :Gs5,:E5, :D5,  :B4, :C5, :E5, :Fs5,:E5, :Gs5,:E5, :D5,
            ],
          [ :B4, :C5, :A4, :E5, :C5, :E5, :B4, :Fs5,
            :B4, :C5, :E5, :E5, :C5, :E5, :B4, :C5,
            :E5, :G5, :C5, :E5, :A4, :F4, :C5, :C5,
            :B4, :C5, :A4, :E5, :C5, :E5, :B4, :C5,
            :G4, :B4, :B4, :D5, :D5, :F5, :F5, :D5,
            :C5, :E5, :B4, :Fs5,:Gs5,:E5, :E5, :D5,
            ]
          ]


live_loop :melody do
  use_synth :piano
  idx = 0
  2.times do |melodyidx|
    4.times do |time|
      if time == 1 or time == 3 then
        melody[melodyidx].each do |tune|
          play tune
          sleep beat * (idx % 2 + 0.5)
          idx+=1
        end
      elsif time == 2 then
        melody[melodyidx].each do |tune|
          2.times do
            play tune
            if idx % 2 == 1 then
              sleep beat * 1
              play tune, pan: 0.5
            end
            sleep beat * 0.5
            play tune, pan: -0.5
            idx+=1
          end
        end
      else
        play :A5
        play_chord chord(:A4, :major7)
        play_chord chord(:A5, :major7)
        sleep beat * 6 * 8
        melody[1].each do |tune|
          play tune
          sleep beat/2
          play tune
          sleep beat/2
        end
      end
    end
  end
end

live_loop :chimes do
  sleep 12 * 4 * 4 * beat
  (12 * 4 * 4).times do
    sample :drum_cymbal_pedal
    sleep beat
  end
end

counter = 0
live_loop :drums do
  if counter % 4 == 0 and counter > 23 and counter < 48 then
    sample :drum_cymbal_open
  end
  sleep beat
  sample :drum_tom_hi_soft, pan: 0.4
  sleep beat * 1.5
  if counter > 23 then
    sample :drum_tom_hi_soft, pan: 0.4
  end
  sleep beat / 2
  if counter > 47 then
    sample :drum_tom_hi_soft, pan: 0.4
  end
  sleep beat
  sample :drum_snare_soft
  if counter % 24 == 0 then
    sample :drum_cymbal_closed, pan: 0.4
  end
  counter += 1
  if counter > 71 then
    counter = 0
  end
end

live_loop :progression_chords do
  use_synth :piano
  4.times do |variation|
    if variation > 0 then
      chords.each do |thechord|
        sleep beat
        play thechord, pan: -0.4
        sleep beat * 4
        play thechord, pan: -0.4
        sleep beat * 3
      end
    else
      chords.each do |thechord|
        sleep beat/2
        play thechord, pan: -0.4
        sleep beat * 2
        play thechord, pan: -0.2
        sleep beat * 1.5
        sleep beat/2
        play thechord, pan: 0
        sleep beat * 2
        play thechord, pan: 0.2
        sleep beat * 1.5
      end
    end
  end
end

live_loop :basses do
  use_synth :piano
  3.times do
    basses.each do |bass|
      2.times do
        play bass, amp: 1, pan: -0.7
        sleep beat/2
        play bass, amp: 1, pan: -0.7
        sleep beat * 3.5
      end
    end
  end
  4.times do
    basses.each do |bass|
      2.times do
        play bass, amp: 1, pan: -0.7
        sleep beat/2
        play bass, amp: 1, pan: -0.7
        sleep beat * 2.5
        play bass, amp: 1, pan: -0.7
        sleep beat
      end
    end
  end
end

live_loop :progression_melody do
  use_synth :piano
  5.times do |round|
    chords.each do |thechord|
      if round == 0 then
        play_pattern_timed thechord, beat/2, amp: 1, pan: 0.7
        sleep beat * 2
        play_pattern_timed thechord, beat/2, amp: 1, pan: 0.7
        sleep beat * 2
      elsif round == 1 then
        play_pattern_timed thechord, beat, amp: 0.6, pan: 0.7
        play_pattern_timed thechord, beat/2, amp: 0.6, pan: 0.7
        sleep beat * 2
      elsif round == 2 then
        play_pattern_timed thechord, beat, amp: 0.6, pan: 0.7
        play_pattern_timed thechord, beat, amp: 0.6, pan: 0.7
      else
        play_pattern_timed thechord, beat/2, amp: 0.6, pan: 0.7
        play_pattern_timed thechord, beat/2, amp: 0.6, pan: 0.7
        sleep beat * 4
      end
    end
  end
end

Se você não estiver afim de instalar o Sonic Pi para testar, e quiser saber como ficou meu blues:

Meu primeiro blues em Sonic Pi

Recomendo! Instala, testa, é divertido!

Publicado por

Elcio

Elcio é sócio fundador da Visie Padrões Web. Pioneiro no uso e divulgação dos padrões do W3C no Brasil, Elcio já treinou equipes de dezenas de empresas como Globo.com, Terra, Petrobras, iG e Locaweb. Além disso, tem dirigido as equipes da Visie no desenvolvimento de projetos web para marcas como Brastemp, Itaú Unibanco, Johnson & Johnson e Rede Globo.

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