Samsung UA46ES7100MXSQ manual Only 2 channel sounds from the receiver, Using the ARC function

only 2 channel sounds from the receiver.

Using the ARC function

You can listen to sound from the TV through a receiver connected using an HDMI cable without connecting a separate optical cable. To listen to sound through a receiver using the ARC function, go to Receiver screen (System

→Anynet+ (HDMI-CEC) → Receiver).