Hi people... I need some help regarding the external audio device connected to Sony google tv. I got my new sony nsx-40gt1. As the volume output is not good I got a vizio speaker bar and connected it using Optical Toslink Cable. Now the problem is I have to control the volume with the remote provided for the external device. When I control the volume using the TV remote, I see a message "Audio system is not registered". Can somebody please tell me how to setup the device to control it from TV remote. Is there any possibility to register the audio device with TV. Thanks Suresh.