Hi, I have just bought a Yamaha Receiver Model RX A830 and set up with a 4K HD TV and HD Sky (Cable) box with HDMI cables. When there are programmes broadcast from Sky box in DD/DTS the receiver does not detect the correct sound format of the broadcast. Instead the receiver shows various other formats on the display, other than the correct broadcast signal. I know there are options to change the sound format manually on the receiver, but I have set the receiver to auto detect the broadcast format and it is not working. Any help would be greatly appreciated.