code: def play_sound(self, sound_file):
          
          self.stop_sound()
          if sound_file:
              cmd = self.check_commands(["ffplay", "paplay", "play"])
              if cmd:
                  if cmd == "ffplay":
                      cmd = "ffplay -autoexit -nodisp -loglevel 0"
                  sound_file = os.path.expanduser(sound_file)
                  c = shlex.split("{} {}".format(cmd, sound_file))
                  self._audio = Popen(c)
docs: Plays sound_file if possible.