pyaudio.PaMacCoreStreamInfo:
Mac OS X-only: PaMacCoreStreamInfo is a PortAudio Host API
Specific Stream Info data structure for specifying Mac OS
X-only settings. Instantiate this class (if desired) and pass
the instance as the argument in PyAudio.open to parameters
input_host_api_specific_stream_info or
output_host_api_specific_stream_info. (See Stream.__init__.)