Quick gist to test fade in....

amp_test.rb

set_volume! 5

set_mixer_control! amp: 0.1, amp_slide: 0.1
sleep 1 # wait for amp to go down
set_mixer_control! amp: 5, amp_slide: 8


live_loop :doombeat do
  # if one_in(3) then sleep [16, 32, 64].choose end

  if one_in(2)
    puts "doombeat 1"
    cut = rrand(60, 80)
    16.times do
      sample :loop_industrial, beat_stretch: 2, amp: 0.225, cutoff: cut
      sleep 2
    end

  elsif one_in(3)
    puts "doombeat 2"
    16.times do
      sample :loop_industrial, beat_stretch: 2, amp: 0.225, cutoff: range(60, 85, step: 2.5).mirror.ring.tick
      sleep 2
    end

  else
    puts "doombeat 3"
    cut = rrand(70, 80)
    8.times do
      sample :loop_industrial, beat_stretch: 4, amp: 0.25, cutoff: cut
      sleep 4
    end
  end
end