When I connect the optical output on this set to my HT receiver I only get a PCM signal. Blue-Ray and Sat. are connected to the set via HDMI. Blue-RAy and sat. audio connected direct to the receiver works fine. LG manual states the digital optical out supports PCM and Dolby Digital signals.
LG support (which is worthless) had every excuss under the sun, such as HDMI cables only support 2.1 signal, my receiver cannot re-encode the 2.1 signal back to 5.1 etc.