If an app doesn’t appear in the list, you’ll need to launch it first-and perhaps start playing or recording audio in it. If you set your master volume to 10 and Chrome to 50, Chrome will play at a volume level of 5. For example, if you set your master volume to 10 and Chrome to 100, Chrome will play at a volume level of 10. An app’s volume level is configured as a percentage of your master volume level. Below that, you’ll find options for configuring the volume level of each individual app, as well as the sound output and input devices that each app uses.