“My Alto 9+ sound bar has terrible audio lag. The firmware version is 2.3; I see that 2.9 is available. I’ve tried a number of things to update the firmware to see if that would help the audio lag problem but no update is available.. How do I update?”
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TCL has a fantastic support system, I've contacted them several times for questions and they are a far better authority on their own products than any one of us customers on Best Buy. I recommend you go straight to the experts on this one, my sound bar is identical to yours and receives updates so you're close to a solution.
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