docs: def open_audio(frequency=44100, format=AudioFormat.default, channels=2, chunksize=1024):
      """Open the mixer with a certain audio format.
      
      Args:
          frequency (int): Output sampling frequency in samples per second (Hz).
          format (AudioFormat): Output sample format.
          channels (int): Number of sound channels in output. Set to 2 for stereo, 1 for mono.
          chunksize (int): Bytes used per output sample.
          
      Raises:
          SDLError: If the audio device cannot be opened.
      """
      check_int_err(lib.Mix_OpenAudio(frequency, format, channels, chunksize))