Samsung UE40ES7000U E-Manual page 729

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When the receiver (i.e. Home
Theatre) is set to on, you can
hear sound output from the TV'
s Optical jack. When the TV is
displaying a DTV (air) signal, the
TV will send out 5.1 channel sound
to the receiver. When the source
is a digital component such as a
DVD player and it is connected
to the TV via HDMI, you will hear
only 2 channel sounds from the