https://twitter.com/kn1kn1/status/961220777696681987

loop_chop.rb

live_loop :l1 do
  loop_chop(:loop_mehackit2, 4, 5, 1.0, 1.5, true)
end

def loop_chop(loop_name, prob_chop = 0, prob_rev = 0, pitch_shift_mix = 0.0, amp = 1.0, pick = false, rate = 1.0)
  dur = sample_duration(loop_name) * rate
  onsets = sample_buffer(loop_name).onset_slices
  onsets = onsets.shuffle if pick
  onsets.each do |onset|
    puts "onset: #{onset}"
    with_fx :pitch_shift, mix: pitch_shift_mix, pitch: [3, 6, 12].choose, window_size: [0.001, 0.01, 0.05].choose do
      start = onset[:start]
      finish = onset[:finish]
      idx = onset[:index]
      s = dur * (finish - start)
      r = 1.0
      r = -1.0 if one_in prob_rev
      rate =  r / rate
      
      in_thread do
        if one_in prob_chop
          d = rrand_i(4, 8)
          puts "d: #{d}"
          d.times do
            sample loop_name, onset: idx, amp: 0.25*amp, rate: rate
            sleep s / d
          end
        else
          sample loop_name, amp: 1.0*amp, start: start, finish: finish, rate: rate
        end
      end
      sleep s
    end
  end
end