Microsoft today announced a new system update for Xbox One that brings Arena on Xbox Live for Killer Instinct, a new Party overlay, and other new features.

“As part of this update, gamers will be able to start competing in Killer Instinct tournaments through Arena on Xbox Live on their Xbox One and Windows 10 PCs, as well as create their own Killer Instinct tournaments in their Clubs,” a Microsoft representative told me today. “The update also includes a new Party overlay for Xbox One owners that displays the Gamertag of who’s speaking in your Party, and the Dolby Access app will arrive soon on Xbox One, which enables Dolby Atmos audio through supported AVRs and sound bars.”

Here’s what’s new.

Arena on Xbox Live Tournaments for Killer Instinct. A new Tournaments tab in the Game hub helps gamers find upcoming Killer Instinct tournaments you can register for directly. You’ll be notified (on the console or via the Xbox app on Windows 10, Android or iOS) when it’s time to compete.

Gamer-created Arena tournaments. The first gamer-created tournaments through Arena for Killer Instinct are now available. (You can also create tournaments for your Xbox Live Club in the Xbox app on Windows 10.)

Looking for Group posting notification. Now, posting in Looking for Group (LFG) is easier than before thanks to a new notifications feature that alerts you when anyone you follow has created a new LFG post.

Clubs on Xbox Live and Beam integration. Clubs on Xbox Live now helps game broadcasters and viewers find each other via a new Beam tab in Clubs.

Party overlay updates. You can now overlay the speaking Party members’ names on-screen, even when the Guide isn’t displayed. You can also configure the overlay’s position and transparency.

Coming soon: Dolby Atmos app. Following its debut in the Windows 10 Creators Update, the Dolby Access app is coming soon to all Xbox One consoles. “This app enables Dolby Atmos audio, creating sound that flows around you, even overhead, through Dolby Atmos enabled AVRs and sound bars,” Microsoft explains. “With an additional store purchase, Dolby Atmos for Headphone en