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.

Olympus OM-D E-M5 mark 2

I've never been able to resist a good body.

 

Especially when the controls feel nice and are easy to access.

Yes, I'm talking cameras once again!

Experimenting with Focus Stacking

Focus Stacking is supposed to be a good way to increase the depth of field, especially for macro photography.

In an idle moment I noticed that my camera had a built in mode to help with this.

So here are my notes on focus bracketing and stacking.

my photographic workflow: RAW > Geeqie > RawTherapee > Gimp > Jpeg

I seem to change the way that I process photos every 18 months or so.

These changes may affect the choice of photo viewer, editor or even the format used to take photos.

So this post just details my current preferences.

Switching from dSLR to micro four thirds

What is it like to use a mirror-less M43 camera after years of using digital SLR cameras?

Is the quality acceptable from the smaller format used in this new breed of camera?

Now that we have made the switch, for us the answer is yes.

Bat Call Analysis: second thoughts

I'm still trying to reconcile my bat call recordings with the data provided in the Jon Russ book "British Bat Calls".

This caused me to question whether my home-brew bat detector was a reliable witness.

Just how much faith can I have that my FD detector is producing sensible recordings?

Bat Detector: electret microphones

Building your own Bat Detector is a relatively easy electronics construction project.

The tricky bit can be locating a suitable transducer or microphone that has a useful frequency response into the ultrasonic range used by common bats.

During the last few weeks I have been testing a number of devices, and here are my notes.