I took a different route with my LG TV and HD621.
I bought a de-embedded that connects to the EARC channel on my LG TV and sucks HDMI audio from the TV and onto my HD621.

All of my UHD video devices connect to the TV. The HD devices to my HD631z

The de-embedded was around £45 from Amazon

Last edited by Mr_Sukebe; 2023-01-07 16:28.
861v4/ID40/LPS, HD621, Roon, BAT VK-600se, Impulse Ta'us. Director/Heed Canamp with HD600s.