Hi,
I've got the same issue with Dolby TrueHD (7.1) as the newest openpli 8.3 does not pass through that audio via HDMI cable. I've got a Denon X4500 Amplifier and, obviously, it can decode the TrueHD sound. However, it doesn't work on my receiver (it's VU Duo 4K).
Can anyone help with this issue of how to pass through the audio signal?