How to disable auto-adjusting of mic input level in Chrome in Mac OS? Although this question has been addressed at this link, none of the solutions worked for me and they are mostly from several years ago (I tried 3 or 4 of them and left comments too). 

The problem I'm having is that the mic input level (in the sound panel of system preferences) keeps decreasing automatically. Each time I reset the audio input level back to 100% my problem is solved. I want to be able to have it just stay put without readjusting.

Here's more detail: I'm using a language learning website that has an interactive feature that allows me to record myself saying a phrase so that it can then check if I've repeated the phrase correctly. But I find that as I'm using this record feature, the input mic level in the system preferences starts to decrease over time. So I end up repeatedly adjusting the mic input level back to 100% and it works well again.

I'm using the Chrome browser on Mac 10.13.6 with a MacBook Pro 2015
If you are using  Audio application (like Skype) or like yours "language learning website that has an interactive feature that allows me to record myself"

you gave them permission to use your audio, otherwise they would not work.

Most of them have audio adjustment within them self (like Skype), so first look for it in your app you are using.

Microphone is used to send something back to the app. In turn it measures the Audio level and sends increase or decrees to your Mac. 

Mac is open to those requests (you gave it the permission).

The only way to stop this is revoke the permission, or check what audio setting the app it self has.

Stopping the Auto gain on your Mac would require application specific monitoring and blocking the audio gain adjustments, which could result in the app not working properly since it might not hear you well.

You also have a tool on your Mac that allows for more control and adjustments.


  Applications > Utilities > Audio Midi Setup