- Press “Windows + R”, type mmsys.cpl and press Enter.
- Select the “Recording” tab.
- Check if you have the device “Stereo Mix”, right-click and select “Enable”.
- Double-click on “Stereo Mix” to open the properties window and select the “Listen” tab.
- Click Properties, Check “Listen to this device”.
- Under “Playback through this device”, select the device you want the sound to output simultaneously.
