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Hi there! The Insignia™ 32" Class F20 Series LED Full HD Smart Fire TV's digital optical audio output delivers a fixed volume level, meaning your TV remote won't control its volume. All volume adjustments must be made directly on the connected external audio device, such as a soundbar or AV receiver, which is standard for digital optical outputs designed to provide an unadulterated signal to external audio systems. — Shiela | Insignia Support
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