The volume mixer is one of the most useful tools built into Windows 11. It allows you to set a custom volume level for each app on your PC. You can use this to your advantage by reducing the volume for apps that send lots of notifications and increasing it for the apps you actually want to hear, like your music player. While the volume mixer has been a part of Windows for many years, Microsoft has been working on revamping it. The updated volume mixer is now available to every Windows 11 user: here's how to make the most of it.