How to disable microphone volume auto adjustment in Cisco Webex

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!

Here is Solutions:

We have many solutions to this problem, But we recommend you to use the first solution because it is tested & true solution that will 100% work for you.

Solution 1

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, see below), 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.

Above, we use volume = 40, which corresponds to the numeric value shown in alsamixer below the green level control fader as shown here: How to disable microphone volume auto adjustment in Cisco Webex.

If you want to set the volume to the "native" volume of your microphone (0dB of the hardware, without added "mic boost" that can add static noise), adjust this volume number until the top left of alsamixer shows db gain: 0.00, like so:

How to disable microphone volume auto adjustment in Cisco Webex

How to determine the .conf file for your microphone

  • Run pacmd list-sources.

  • In the output, search for the index: section listing the desired device, e.g.

      * index: 6
        name: <alsa_input.usb-Blue_Microphones_Yeti_Stereo_Microphone_REV8-00.analog-stereo>
        active port: <analog-input-mic>
  • The active port part at the end contains the file name you need to edit in /usr/share/pulseaudio/alsa-mixer/paths/.

    In the above example, it is <analog-input-mic>, so we would edit /usr/share/pulseaudio/alsa-mixer/paths/analog-input-mic.conf for this mic.

Note: Use and implement solution 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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