BirdNet-Pi: USB audio module testing

I've bought a couple more modules

so thought I'd do some tests to compare performance.

This post concerns the use of USB audio modules in connection with miniature electret microphone capsules.

BirdNet-Pi: more thoughts on microphones & audio

There's a lot of talk on the Github Discussions page about microphone quality.

So naturally I have been giving the matter some consideration and have conducted a few simple checks.

Bat Detector Overhaul: Automation

In England, the number of bats is declining, and has been for the last 100 years.

Organisations like the Bat Conservation Trust are always looking for volunteers to gather and post information on bat numbers and species in your local area.

While I'm neither a bat expert nor a bat volunteer, I thought it might be interesting to automatically gather data from a fixed location (...as this would save me poncing around the fields in the dark!).

The Adafruit USB Audio Adapter

This USB module is recommended for the Raspberry Pi, but one of the sales bullet points for this module says "Not recommended for Mic input"

Why would you buy it just for the audio output when the Pi already has an audio output?

Well I need it for the audio input, and for just £4.77 post free from The Pi Hut via Amazon, it was worth a punt.