Whenever I ran the Ring Doorbell Windows app, it would always lower the volume on any other application (music, video, etc.) that was running. As soon as I closed the Live View, the volume on the other apps would return to normal. I contacted their support and was told that it could be a driver issue. Obviously, they didn’t really know why it was happening.
Well, I did some more digging and discovered that in the Sounds dialog, there is a Communications tab. By default, the “When Windows detects communications activity” option was set to “Reduce the volume of other sounds by 80%”. That sure sounded like what was happening, so I changed it to “Do nothing”. BINGO! That fixed it!
I never even knew that setting existed. To get to the Sounds dialog, click the Windows icon on your desktop to bring up the menu. Type Sound and it will appear. It will say Control Panel underneath.
I’m not sure if other versions of Windows do the same thing, but I wouldn’t be surprised. Good luck!