so, I bought a brandnew Raspi 4, flashed a new image of Raspi OS Lite on my SD card, put on the ReSpeaker on the Raspi, started the Raspi up and followed the steps from here to install the mic:
Unfortunately, arecord -L reports something different from what it is supposed to show:
null Discard all samples (playback) or generate zero samples (capture) lavrate Rate Converter Plugin Using Libav/FFmpeg Library samplerate Rate Converter Plugin Using Samplerate Library speexrate Rate Converter Plugin Using Speex Resampler jack JACK Audio Connection Kit oss Open Sound System pulse PulseAudio Sound Server upmix Plugin for channel upmix (4,6,8) vdownmix Plugin for channel downmix (stereo) with a simple spacialization playback ac108 default output usbstream:CARD=Headphones bcm2835 Headphones USB Stream Output usbstream:CARD=vc4hdmi0 vc4-hdmi-0 USB Stream Output usbstream:CARD=vc4hdmi1 vc4-hdmi-1 USB Stream Output
Consequently, when running
arecord -Dac108 -f S32_LE -r 16000 -c 4 hello.wav, I get an error:
ALSA lib pcm_hw.c:1829:(_snd_pcm_hw_open) Invalid value for card
arecord: main:830: audio open error: No such device
Any suggestions what I am doing wrong?