Sound problem with UM7300PUA


Novice Member
I have the above model tv (up to date) and the sound has been sub-par since I've had it.
I have tried 3 different sound bars, each tried with optical and ARC with not much improvement.
I think I could improve on the sound by adjusting the sound mode..... But here's the issue:
When I go to settings, then sounds, adaptive sound control, sound mode settings and AI acoustic tuning are all grayed out.
The Web OS is 4.9.3.
Can someone help me with this please?

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