By default, the audio volume control in the system tray in Windows 10 is the master sound control that controls for all applications. Turning it up or down makes the sound louder or lower for all applications across the board.
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There are many ways you can tweak your Windows 7 to make it looks more like a Mac. The most common way is to get ride off the taskbar and add a Mac Style dock. How you customize your Windows
Yes, you see it right. It’s the new Volume Mixer in Windows 7, which lists all applications that are currently running and producing the audio. At the time I took above screenshot, I have Yahoo! Music running in Firefox, RadioIO