Hi Jon,

SmartLink 3x SPDIF or MMHR has some metadata embedded into the signal which enable the Meridian Processor switch to either Music or Movie layout. I guess this is why Meridian used the term SmartLink.

However, the HD621 still needs a comms connection for source switching, standby etc.

Regards,
Carl

861v6+ID40, HD621, 8000.2, 7200HC, 7200.2, SKYQ Silver, PS3, PDP-LX6090, QNAP TS870-Pro (8*6TB), Roon, iPadAir2.
[In Reserve] C15, MD600 (2*3TB), TwinStore RM (2*2TB)