Respeaker-2 suddenly started to talk slow and with a very low voice

My respeaker-2 suddenly started to talk slowly and with a very low voice. Music is also played slow and frequency down shifted. I reinstalled like this:

rm -rf seeed-voicecard
git clone
cd seeed-voicecard
#sudo ./
sudo ./ --compat-kernel
sudo reboot

But it is still like Barry White has taken over my raspberry pi…

Any idea what could have happened an how to solve this?

kind regards,