Why is the microphone not working on xubuntu 20.04?

Question

linux

switched from win7 to hubuntu, the microphone does not work either in the cart or in the obs. produces a hiss.

found this
https://goto-linux.com/2020/4/16/%D0%BA%D0%B0%D0%B...

on point 2
sudo arecord -f S16_LE -d 10 -r 16000 --device ="hw:1,0" /tmp/test-mic.wav
says
Record WAVE '/tmp/test-mic.wav' : Signed 16 bit Little Endian, Frequency 16000 Hz, Mono
arecord: set_params:1374: No number of channels available

what does it mean? and how to decide?