Does that mean that MMHR only supplies digital audio signals (eight wires = 4 x 2-channel SPDIF out and return) and does not transmit any metadata?

So is a comms connection also required between the HD621 and procesor or is metadata multiplexed over one of the MMHR digital audio streams?

In the spirit of Spinaltap, I would like to confirm that I am not involved in the corrupt theft of a global sport.