Additionally if you continue to scatter related issues randomly around the forum you may be subject to a time out.
I've a Nano 33 BLE Sense. I'm reading about the PDM sound library:https://www.arduino.cc/en/Reference/PDMIt's not clear which library this is. In IDE / Manage Libraries, the closest I see is the Adafruit Zero PDM library, with the GitHub repo here:https://github.com/adafruit/Adafruit_ZeroPDM
Is that it?
Or is it a different library that's discussed on the first link, one that is owned by the Arduino project?
In general - on the main library pages on arduino.cc please add links to the corresponding GitHub repos. You'll make life easier for your users.
The standard Arduino user is not interested in GitHub repositories so that might be the reason why they are not there.
Examples are always useful. Which headers to #include? How to initialize the library? What's the context for some simple calls? One look at the example file in the repo you've indicated was more helpful to me than many hours of googling and just trying things randomly.It was easier with all the other libraries I'm using in this project, because the More Info link in the library manager always sent me to a place where I could find examples, like a GitHub repo. But for PDM I could find no such thing - until you posted that URL.It would be very helpful to just add a simple link at the bottom of the documentation page for each library of this kind: "examples - click here".