Yeah, the AVR. I generally use Neural:X for anything not Atmos/DTS:X like you.
Denon X6500H 7.2.4 -> LG OLED65C9P
Main: NVIDIA Shield Pro (2019) Other Devices: Apple TV 4K, FireStick 4K Max (2023), Homatics Box R 4K Retired devices: Zidoo X9S, Xiaomi Mi Box, All the old RPi’s
