Yes, you can control the volume through an optical cable on an LG TV if the sound settings are configured correctly.
Here's a breakdown of how it works:
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LG Sound Sync (Optical): The key is to set the sound output on your LG TV to "LG Sound Sync (Optical)." When this setting is enabled, the sound bar (or other audio device connected via optical cable) will automatically switch to "LG OPT" mode.
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TV Remote Control: With the correct configuration, you can then use your LG TV remote control to adjust the volume, and the sound bar will respond accordingly.
In essence, controlling the volume through the optical cable relies on the LG Sound Sync feature, which allows the TV's remote to communicate volume commands to a compatible audio device connected via optical.
