I know people have posted about this but there doesn’t seem to be a real clear answer.  I have a sonos amp in my basement.  I have an outdoor project that is not ARC or E-ARC.  From what I have found there is still a way to get my outdoor projector to play out of my B&W outdoor speakers.  Something along the lines Amazon firestick in HDMI audio extractor extractor into HDMI to optical sonos adapter and then on the other end HDMI into my amp?

Also, I plan to use an outdoor weatherproof box because the distance from my outside to my amp would need about a 75 ft HDMI cable.  I want to have a splitter so I can run two shorter cords.