Input 4, which is conveniently marked with a little game controller icon, also accepts 4K/120Hz with and without HDR. All four of its HDMI inputs are compatible with variable refresh rate, including AMD's FreeSync and standard VRR formats, as well as ALLM (aka Auto Game Mode), which lets it automatically switch to game mode to reduce input lag when it detects you're playing a game. Gaming features are one of the QN90A's strong points. I've seen no evidence that one HDR format is inherently "better" than the other, so I definitely don't consider the lack of Dolby Vision a deal-breaker on this TV - it performs like a champ without that format. It lacks the Dolby Vision HDR support found on most competitors' HDR TVs. The set supports high dynamic range content in the HDR10 and the HDR10 Plus formats. Plug in an optional webcam (Samsung has a list of recommended cameras, all by Logitech) and the app will track your exercises and give you coaching complete with celebrity personal trainers like Jillian Michaels. Samsung's health app debuted on its TVs in 2020 and this year it's expanding to offer guided personal training.
And like most TVs, you can also pair the QN90A with separate Alexa or Google speakers. With Amazon and Bixby (but not Google) you also have the option of simply saying "Alexa" or "Hi, Bixby" wake words, allowing you to issue commands hands-free and unlike last year the mic is located in the TV itself, not the remote. Whichever one you choose will be available when you press the mic button on the clicker. Voice command is built-in and you can choose between Amazon Alexa, Google Assistant or Samsung's homebrew Bixby. The voice assistant can be summoned from the remote or hands-free by saying "Alexa" or (if you prefer, for some reason) "Hi, Bixby." David Katzmaier/CNET Choice of voice assistant, optional webcam
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