I am using Cisco Webex for the online meetings, the problem is that the microphone volume automatically goes to maximum and I just can't decrease it. Is there any way to solve this problem? Any help would be highly appreciated!
I had a similar problem. Sometimes it is impossible to prevent applications from trying to adjust the microphone level. With Ubuntu, it is at least possible to prevent ALSA from responding to such requests.
In the configuration file
/usr/share/pulseaudio/alsa-mixer/paths/analog-input-internal-mic.conf (you might have to look for the correct file for your microphone), I changed to part
[Element Capture] switch = mute volume = merge override-map.1 = all override-map.2 = all-left,all-right
[Element Capture] switch = mute volume = 40 override-map.1 = all override-map.2 = all-left,all-right
and after a
sudo alsa force-reload, applications don't magically change the microphone volume anymore.