Getting microphones of ReSpeaker 2-Mics Pi HAT working with Darkice for Icecast

Hello everyone,

Im building a remote soud/baby monitor using a raspberry Pi Zero W and a ReSpeaker 2-Mics Pi HAT.
On it I run Raspberry PI OS lite and did these tutorials:

  1. Update everything sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade

  2. Do

  3. Get darkice and Icecast to work:

The webpage shows fine and when I use in the config file darkice.cfg
device = plughw:0,0 # Soundcard device for the audio input

Here is the problem:
I dont know how to get sound from the two microphones into darkice. The stream works but I hear nothing. Also the test with the |arecord -f cd -Dhw:0 test.wav|
||aplay -Dhw:0 test.wav| dont seem to work. 0 is the right number. But It does not seem to stop and I dont hear anything over the headphones. I had to do + c

Can anybody help me / guide me in the right direction?

Thanks in advance!