Thanks, Moridin. I think you made the right point. I guess it is not enabled in the HDMI for multi-channel audio. I talked to Yamaha tech support this morning. The guy told me that it should be decoded in multi-channel audio if there is multi-channel audio from the HDMI connection. I can still enjoy the DD sound through the toslink connection, just need to reset the reciver to take the audio signal from Optical/Coxial connection. Thanks again.

Han