Low Volume feature in Windows 11/10
However, if you don’t like this feature, and you wish to stop Windows from automatically lowering the volume, you can disable this Low Volume feature in Windows as follows:
Open Control Panel > Hardware and Sound > Sound > Audio properties page > Communications tab. You can also open the Sound settings via Settings > System > Sound > More sound settings. The options available are:
Select Do Nothing from the available options, click Apply/OK and exit. That’s it. You will have disabled this feature. Related reads:
Computer sound volume too lowComputer volume increases or decreases automaticallyComputer volume too loud on the lowest setting.