NOTE: If you can, try to follow these instructions as closely as possible. Here, we'll show you how to set up your Harmony remote to control everything at once. While it doesn't really eliminate the hassle entirely-since Logitech's setup software is a little awful-it does give you far more control over the movies, music, and other devices in your living room. Logitech's Harmony line is designed to take the hassle out of controlling your home theater (and, on certain higher-end remotes, your smarthome devices, too).