Picovoice Issue: Soundlevel always 0 on STM32F411E-DISCO

[Jokymon]

Make sure you have read the documentation, and have put forth a reasonable effort to find an existing answer.

Expected behaviour

After connecting my STM32F411E-DISCO using pvshepherd I would expect to be able to record some audio - even some ambient noise - and see samples != 0 in the recorded output.

Actual behaviour

Everytime I record audio, the amplitude always stays 0.

This is also reflected in the fact, that no voice recognition is working at all.

Steps to reproduce the behaviour

I used an STM32F411 Discovery Kit out of the box, connected both USB cables and used a fairly recent pvshepherd-version 0.9.9 that I installed via pip.

[mrrostam]

Just to make sure that there is nothing wrong with the onboard mic, can you please try the BSP example inside STM32CUBEIDE and verify that the mic is working correctly for that project?

[Jokymon]

Thanks for your support. It turns out, the problem is indeed a defective microphone. I could try on a different board and got it working flawlessly.