def setup():
global audio_player
global crank_handler
global stop_button
GPIO.setmode(GPIO.BCM)
GPIO.setup(stop_button, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(next_button, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
audio_player = AudioPlayer()
audio_player.load_file()
crank_handler = CrankHandler()
