Noisy Typer in Ruby

gistfile1.rb

require "mac-event-monitor"

def main
  m = Mac::EventMonitor::Monitor.new
  m.add_listener(:key_down) do |e|
    system('afplay /Users/youpy/Downloads/NoisyTyper-v001/NoisyTyper.app/Contents/Resources/%s.mp3 &' % keycode2name(e.keycode))
  end
  m.run
end

def keycode2name(keycode)
  case
  when keycode == 36
    'return-new'
  when keycode == 49
    'space-new'
  when keycode == 51
    'backspace'
  when [50,18,19,20,21,22,23,26,28,25,29,27,24].include?(keycode)
    'key-new-01'
  when [48,12,13,14,15,17,16,32,34,31,35,33,30,42].include?(keycode)
    'key-new-02'
  when [57,0,1,2,3,5,4,38,40,37,41,39].include?(keycode)
    'key-new-03'
  when [56,6,7,8,9,11,45,46,43,47,44,56].include?(keycode)
    'key-new-04'
  else
    'key-new-05'
  end
end

main