Sometimes, You need a hotkey to adjust the volume in Windows PCs. For example: You need to adjust the audio level when you play full screen video or game.
There is a simple way to do this, here are the steps:
1.Install and run Perfect Hotkey software.
2.Configure your keyboard shortcuts for volume adjusting
Perfect Hotkey will let you assign whatever hotkeys you wish to control your system audio, By default, You can use CTRL+UP and CTRL+Down to set the volume level after you install Perfect Hotkey.
3.Done
Perfect Hotkey supports to the following tasks with a assigned hotkey:
1.Open URL
2.Open File/Folder
3.Volume Down/Up
4.Canned Messages
Download link: http://www.pcclean.io/perfect-hotkey/