Samsung UN55ES8000G E-Manual page 110

sound echo caused by the difference
in decoding speed between the TV's
speakers and the speakers attached to
your audio receiver. If this occurs, set
the TV to
N
When
External
are turned off. You will hear sound
through the external speakers only.
When the
Speaker, both the TV's speakers and
External
Speaker Select
Speaker, the TV's speakers
Speaker Select
Speaker.
is set to
is set to TV