LG webOS
An echo can come from two speaker paths playing together
When TV speakers and an external speaker reproduce the same programme at different times, the result can sound like an echo.
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The viewing journal — page 26
Practical reading about screens, players, Canadian viewing and the decisions behind a better setup.
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LG webOS
TV standby does not always mean a fresh app start
A fast-start feature can preserve a different system state from a full manufacturer-supported power cycle.
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VIDAA
A mobile remote app is not automatically the TV player
A phone application may control the television without decoding the programme or holding the viewing account.
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Roku
Why Roku AirPlay can work awake and fail in standby
Receiver availability can change with standby behaviour.
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HDMI audio
Why a TV app and an external box can produce different audio
The same speakers can receive sound through different decoding and connection paths.
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HDMI video
A different HDMI cable cannot add an app or video decoder
A cable carries a supported signal between devices.
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