Do you think AV receivers will ever support 6 channel pass through? I know it is a very new format and not even LAV filters has an option for 6 channel pass through of Flac. Although both LAV filters and my Yamaha rxv-679 support flac indepedently. They don't support pass through in the manner in which ac3 or dd and dts supports pass through. The best I can do is down mix the 6 channel FLAC on the lav filters before it reaches the AVR and listen to it only on headphones on the AVR. I could down mix and then upmix but that just seems annoying. Such a shame as well because 6 Channel flac sounds amazing, if only i could pass it through.