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Hi Wayne. We will need some clarification on what background sound adjustments are. The LG UHD 70 Series 55 inch 4K HDR Smart LED TV, Model # 55UN7000PUB has Sound Mode Settings like AI Sound / AI Sound Pro that automatically optimizes sound based on content type. Standard that optimizes the sound for all types of content. Cinema optimizes the sound for cinemas, Clear Voice III/Clear Voice IV boosts sound clarity, Sports /Soccer optimizes the sound for sports games, Music optimizes the sound for music, and Game optimizes the sound for gameplay. Virtual Surround Plus / Virtual Stadium Surround Plus / ULTRA Surround / ULTRA Stadium Surround allows you to enjoy an immersive soundscape with the virtual multi-channel surround sound effect. The Equalizer lets you set the desired sound by adjusting the equalizer directly (100Hz / 300Hz / 1kHz / 3kHz / 10kHz)...^IFV
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