Originally Posted by GMT
What if I want 4k and don't care about the new codecs, but still want 5.1 surround?
You can either buy a source with two HDMI outputs, where one output is used for audio to the HD621 or...
buy a HDFURY (Integral or Vertex) to remove all the handshaking/copy protection nonesense. That way your source will work with the HD621 and not tell you that a non-compatible device is connected.

One output goes to the TV/projector, the other into the HD621. The video connection from the HD621 to the TV/projector is not required anymore. If you need more inputs, then add an additional HDMI switch before the HDFURY. If you have a single programmable remote, this is really no different than using the regular M remote, even though you're hiding one/two additional devices in the rack.

- Stephan