May I follow on with this thread, as I am trying to setup a multi-room setup using Hifi Berry/RPi3 which is setup in one room for now and working for music on a network drive.
When watching live TV or a video via Plex – is it possible to extract/divert the TV sound to the Hifi Berry/Rpi3 so that the sound is not coming from the TV speakers but the Hifi Berry speakers (which will be ceiling mounted)?