Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems Using HD621 to 861 for audio processing only in a 4K setup

The solution was to turn off eArc on the TV and use Arc. And set eArc/Arc to auto on the Vertex2.
Also had to set the Audio Flag on the Vertex2 to 5.1. Seems there is a "bug" or interoperability issue when connecting the HD621 to the Vertex2 Audio Out, it can't read the EDID from the HD621 and you have to force it to 5.1.

Hello .
I just discovered this post.

For your information I finally found a Swiss knife for Meridian:

Another solution (Chinoppo ...)
GIEC BDP G5800
or his little brother
GIEC BDP G5300

lt also works well, but ideally provide a +5v and +12v linear power supply.
It plugs into the video HDMI via a 4x2 Matrix.4k 60Hz HDR
It plugs into HDMI Audio on the HD621 .

The result is excellent.