Syncing Christmas lights to music is a fun and festive way to add some extra holiday cheer to your home. To get started, you'll need a set of Christmas lights and an app that can sync the lights to your music. The app will typically have a variety of different color settings and patterns that you can choose from, as well as the ability to set the tempo of the lights to match the beat of your music. Once you've chosen your settings, just connect your lights to the app and watch the magic happen!