Thankfully, switching output devices is much easier in Windows 10 than it was in the old days. For example, if you have a set of speakers hooked up to your computer and you plug in a new monitor over HDMI or DisplayPort, it may start playing audio from the monitor's dinky built-in speakers, rather than the desktop speakers you have plugged in. When you have multiple sound devices plugged into your computer at once, Windows has to pick one from which to play sound-and it doesn't always pick the most obvious choice. How to Set Up Two-Factor Authentication.How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.