I have a Panasonic SC-BTT775 All in One system. I have connected my xbox to the HDMI in and the system is connected to the TV via HDMI (Arc). The system doesn't have a headphones socket so I want to use the headphones socket on the TV when using my xbox sometimes. However what ever settings I try I cannot get the sound to output through the TV speakers. The instructions say its possible if I set the system volume to "0" and the audio output is 2-channel audio, but it doesn't say how to set it to 2-channel audio. I have found a setting called HDMI Audio Out and turned that ON. Does anyone have this system and knows how to configure this. Otherwise is there anyway to get headphones connected to the Panasonic system itself I cannot see a way. Apart from this one issue I'd say this is a pretty good system, just wish it had a headphone socket. Thanks.