I think in your case then you are right , they should be able to sync since both signals are digital and hitting the same processing in your receiver . The situation I was trying to illustrate was people that have the CC plugged right into a TV , which would probably be the majority of users . Every TV will have it ' s own processing of the HDMI signal , introducing latency . Now try to group that with a CCA plugged into basic audio system or GH where the latency is very low and you will see the issue right away . Google just won ' t enable this because people would be mad that audio is not syncing . I doubt their intention with the CCA was to perfect whole home audio , I think it was just to give old audio systems a second chance . Same could be said for the CC giving dumb TV ' s some smarts . Now they could very well do some more development to give users options to adjust delays and all , but I doubt that is high on their list at all .