Please right click on Stereo Mix and select Enable from the context menu.Now, you’ll be able to see a recording device named Stereo Mix (or Wave Out Mix, Mono Mix, etc.).Select Show Disabled Devices from the pop-up menu.Now, go to the Recording tab next to Playback.Choose a primary speakers audio playback device and then click on the Set Default button.Go to the Playback tab instead of the Sounds tab selected by default.Select Sounds from the pop-up menu to open the Sound window.Right click on the sound volume icon in the system tray located in the lower right corner.Besides, you can select audio output devices for specific apps on Windows. How to output audio to two or multiple devices in Windows 10? You should enable Stereo Mix and select multiple outputs devices for audio playback Windows 10: right click on the sound volume -> select Sounds -> choose a primary audio playback device -> enable Stereo Mix -> set as default -> select a secondary audio playback device -> apply changes.