C:\\Program Files (x86)\\Microsoft Visual C++ Build Tools>pip install pyaudio
Collecting pyaudio
Using cached PyAudio-0.2.11.tar.gz
Installing collected package
Prebuilt wheels of PyAudio are currently available for Python 2.7 and 3.4-3.6. If you don't want to use Python 3.6 and want to install PyAudio in 3.7 you have to compile and install PortAudio and PyAudio from sources. See the instructions at
http://portaudio.com/docs/v19-doxydocs/tutorial_start.html
https://smaudet.wordpress.com/2014/01/26/building-pyaudio-on-windows-7-x64-using-the-free-msvc-toolchains/