There's no audio in any of my videogames.

As the title says, none of my PC games have any audio, and I've checked the volume mixer (which is the only thing I know how to do bc I know nothing about computers) I played one game last night, and tested it again just now with a different game, but they were both full volume on the mixer, so I know that's not the issue. I use windows, for reference. Can someone help me with this?