OP from Post#1 has helped many many ppl for many years to come. It works like a magic! with many Nvidia GPU series. As the OP stated that the script works as well for AMD graphic cards, I'm just wondering if there is a way to tweak HDMIAudio-1.1.kext for AMD Radeon RX480? I have tried it but ended up with no success so far. Perhaps some more inputs, anyone? Or is it even possible at this moment?