Great thread topic on AVR detection and explanation on how-to utilse rpi4's spare HDMI port to output audio directly to AVR (HDMI 1.4b in my case) when following Settings are correctly assigned to required hdmi out.
- Settings -> System -> Audio -> Audio output device
- Settings -> System -> Audio -> Passthrough output device
Just been testing method/process with hdmi0 (video) and hdmi1 (audio) this morning (which works perfectly, thanks) and like others, I now understand will need to permanently setup edid and config, such that rpi4 remembers hdmi1 connection, when rpi4 and/or AVR is powered off/on.
Thank you HiassofT
To me, on the other hand, I still can't get the audio to work, if I connect my Marantz av7701 to the second hdmi output of the raspberry pi4.
The receiver is regularly recognized and with the method written in this thread, the receiver also works and I turn it off when I turn on the raspberry, but unfortunately no audio.