3D audio formats only work when you enable passthrough. The over-head audio metadata is only carried in the raw audio stream via passthrough. PCM can only deliver up to 7.1 channels, ergo the 3D audio part will be lost, if you let the Vero transcode the audio stream to PCM before passing it to your AVR. If you want to benefit from 3D audio, you’ll probably have to live with the time your AVR needs to detect the passthrough audio stream after every playback initialization or after resuming playback…