I think a vast majority of our readers use PCs to make voice calls. Windows 7 has lots of built-in functionality around this feature. Let’s take a look at one of the most practical.
When you’re using a PC to make calls and you have a sound producing app on the side, Windows 7 will automatically reduce the system volume. I prefer completing muting everything and that’s how I’ve set mine up. Here’s how.
Press Win+R and type in mmsys.cpl. This will take you directly to the Sound section of the Control Panel. Click on the Communications tab and choose Mute all other sounds. As expected, this will automatically mute everything but the call.