Twitter and Yahoo’s Tumblr have touted their networks as vital online hubs for TV and movie fans. But on those networks, inserting your comments into a broader discussion about a particular show isn’t the smoothest of tasks. Typically, it involves identifying a particular hashtag and manually adding it to your comment.

That’s why Facebook is rolling out its new audio fingerprinting tool, detailed on Wednesday with a company blog post. With audio fingerprinting, you needn’t go looking for a hashtag. Instead, you click a button on your Facebook mobile app, it listens to the TV show you’re watching, and then it automatically links your comments to the right online forum–at least in theory. Behind the scenes, Facebook’s servers will do a lot of heavy lifting to match the audio with the right discussion, but to you, the process is seamless–particularly when compared to hashtagging.