ScreensieHardware
How to Change Speakers in Windows
Choose which speakers, headset, monitor, or dock plays sound.
Follow the steps in order and stop if the screen or target does not match what is described. Use administrator access only when the task requires it.
Open Quick Settings
Select the speaker/network area on the taskbar.
Open the output list
Select the arrow beside the volume slider.
Choose the device
Select the intended speakers, headphones, monitor, or dock.
Test at low volume
Start with low volume, play a known sound, and raise it gradually.
Use full settings if needed
Open Settings > System > Sound to configure defaults per application.