devilhuan014 wrote: ↑
Tue Dec 10, 2019 3:48 am
(3) Mic Microphone with Usb Port (Unable to find relevant code)
You can use arecord
with the parameter "-vvv" and pipe it to e.g. "/dev/null", regexp and convert the values. It works with usb-mics or webcams. But it isn't a calibrated/real dB output...