https://makersportal.com/blog/recording-stereo-audio-on-a-raspberry-pi
https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout/raspberry-pi-wiring-test

sudo apt install python3-pip
sudo pip3 install --upgrade adafruit-python-shell
cd /tmp
sudo wget https://raw.githubusercontent.com/adafruit/Raspberry-Pi-Installer-Scripts/master/i2smic.py
sudo python3 i2smic.py

# plug microphone
sudo reboot
arecord -l
arecord -D plughw:1 -c1 -r 48000 -f S32_LE -t wav -V mono -v file.wav

# Control record volume
cp res/.asoundrc ~/.asoundrc

# alsa API
http://www.equalarea.com/paul/alsa-audio.html

# for project
sudo apt install libasound2-dev wiringpi

# for cava
sudo apt install libfftw3-dev libasound2-dev libtool automake
./autogen.sh
./configure
make
sudo make install

# Access point
grep "Access point conf" $(find /etc -type f)