Thankyou Davisg for checking what is actually happening with the Sky sound.

I'll see if any improvement over next couple of days, and then I'll cancel Sky movies if it stays at the same status.

Dunnersfella: TV model is 55LA6230. I was presently surprised when it output 5 channel to reciever from optical, even when input was from HDMI. Previous TV which was Phillips would not do this.

Runningman: info button on TV only shows it's a dolby signal, but not how many channels of sound are in boardcast.

On a channel like box, receiver shows left right lights, but there is no dolby light lit up, and it does prologic on those channels.

Thanks for everyones input.