I was attempting to take on the Matrix Google Assistant project, and got some errors. In the video tutorial, it said you could run arecord recording.wav -f S16_LE -r 16000 -d 5 to test the mics. However, when I ran the command, I got this error:
pi@raspberrypi:~ $ arecord recording.wav -f S16_LE -r 16000 -d 5
ALSA lib pcm_hw.c:1713:(_snd_pcm_hw_open) Invalid value for card
arecord: main:788: audio open error: No such file or directory
I have researched solutions, but found nothing. I’m stuck.