HDMI can be handy when you want to stream media on big-screen TVs or to use other multimedia devices. HDMI-compatible devices include computer monitors, video projectors, HD and Ultra HD TVs, Blu-ray players, digital cameras, camcorders, etc. If you're getting the 'The device is being used by another application' error message, follow the instructions in this article to fix it. HDMI (High-Definition Multimedia Interface) provides an interface between audio and video sources such as video display devices and other compatible components.
Please close any devices that are playing audio to this device and then try again.' HDMI Audio Error in Windows 10
How to Fix 'The device is being used by another application.
