audio_playback.ipynb is not working

[fisipro2]

The audio_playback.ipynb does not work. It records nothing. I tried many different brands and types of microphone, none of which works. I also tried the the microphone port and the line-in port, none works.

I got the same issues as this:
https://discuss.pynq.io/t/audio-base-overlay-not-reading-microphone-input/1064

This must be a bug.