Hm, I just had a look at the spec sheet that is on their page at the moment (actually it's from Jan. 2017) and there's no mentioning of HDMI bitstream OUT, neither in the text on the first page, nor in the block daigram further down: https://smyth-research.com/wp-content/uploads/2018/05/RealiserA16datasheet.pdf Compare this to the first block diagram that's been posted with the KS campaign: https://ksr-ugc.imgix.net/assets/01...-q=50&q=92&s=c25a2058dc46606eb91b2cb5eeb10f59 That clearly stated 36.8 Mbps bitstream OUT. So it seems (maybe with the updated HDMI board?) the bitstream output has been lost somewhere on the way and we'll never get Atmos measuring signals out of the HDMI output! The only hope left is the measuring disc with Atmos for the asynchronous measuring mode. But I doubt that this will become reality in the near future.