Please help. Sonos ARC - New Fire Cube - Projector. I can play music through Alexa App from Cube to ARC. What I can’t do is get sound from video. I tried a splitter from my cube to projector and ARC, but no sound is coming from the ARC. My projector has no ARC HDMI - the only output sound via old school audio cable. I have a new Cube and new ARC and we can’t use them to watch TV.