Ubuntiu Skype sound issue – solved
Running the Skype 18.104.22.168 beta on ubuntu , the on-board microphone for several inexpensive video cams would not play nice until the following single adjustment was made:
start Skype >>open Options >> open Sound Devives >> UNtick the box (remove the default) “Allow Skype to automatically adjust mixer levels”
That simple. Apparently the auto adjust under PulseAudio reduces the USB microphone output to 0.