pyaudio not working on python 3.9 code example

Example 1: why pyaudio is not installing

"""
If you are having trouble installing PyAudio on your mechine, pyaudio
is a unofficial library, so you need to use pipwin to install and use
PyAudio and if you don't know anything about pipwin no problem you may 
watch this video: https://www.youtube.com/watch?v=-3am_5jMzJ4
"""

Example 2: pyaudio not installing

pipwin install pyaudio