Samsung UN46ES7500F E-Manual page 441

– To hear 5.1 channel audio, connect
Anynet+ (HDMI-CEC) Menu
The Anynet+ menu changes depending on
the type and status of the Anynet+ devices
connected to the TV.
HDMI cables to your Anynet+ DVD
player, satellite box, etc. Then, connect
the DIGITAL AUDIO OUT (OPTICAL)
port on your DVD player, Satellite
Box, etc. (i.e. Anynet + Device 1 or 2)
directly to the Home Theater, not the
TV.