Thanks guys. Goal is to have the 5.1 AVR playing TV sounds (not the TV itself) fed from a cable box, while simultaneously playing the same audio (in perfect sync) through the whole house audio system to a nearby kitchen area. What is best way to achieve this to avoid echo (since I do not want to "turn down" the AVR)? My plan was HDMI from cable box to AVR as normal, but adding RCA line out from cable box to whole house audio amplifier. Am I to understand that the both systems will--or won't--play in perfect sync hooked up in this fashion? How do others handle this?
I do not want to blast the AVR in the family room in order to hear it in the nearby kitchen area (hence the concept of whole house audio), but the spaces are close enough that an echo would be annoying. Am I better off running a dedicated set of "B" speakers to the kitchen from the AVR directly for TV audio only? Seems like a waste, plus would like to hear it in other rooms as well. Thanks for any insights!