gistfile1.rb

require 'scissor'

def main
  max = 16
  max.times.inject([[random_sequence], Scissor()]) do |memo, i|
    # workaround to avoid ecasound bug which occurs when the number of tracks is 3 or 10 (or more)
    tracks = memo[0] + (max - (memo[0].size - 1)).times.map { Scissor.silence(1) }

    memo[1] += (mix(tracks, 'tracks_%i.wav' % i) * 8)
    memo[0] += [random_sequence]
    memo
  end[1] >> 'result_%i.wav' % Time.now.to_i
end

def mix(tracks, filename)
  Scissor.mix(tracks, filename, :overwrite => true)
end

def random_tape
  # http://beatsdrummachine.com/hammerhead_drum_sounds.zip
  Scissor(Dir[File.expand_path('~/Downloads/hammerhead_drum_sounds/*.wav')].sample)
end

def random_sequence
  n = rand(100)
  Scissor.sequence(16.times.map {|i| Math.sin(n * i) > 0.7 ? 'x' : ' '}.join(''), 60.0 / 105 / 6).apply(:x => random_tape)
end

main