PyAudio是开源跨平台音频库PortAudio的python封装，PyAudio库的维护者是Hubert Pham，该库从2006年开始推出，一直持续更新至今，pzh-py-speech使用的是PyAudio 0.2.11。

This allows him to record from the audio playback which provides an internal source for the pyAudio package. His Python script saves snippets of the streaming audio to .wav files.