Hi, I resolved this by using a Portta optical switch unit. I've taken optical connections from the Sky Q box, TV and PS4 Pro, with the output going into the Sonos Beam. This bypasses the shonky audio processing on the Q9FN. The Portta comes with a remote control but I have integrated it into my Harmony system, so when 'Watch TV' is triggered from the harmony remote or Alexa: 1. Turns on the TV and sets it to HDMI 1 2. Turns on the Sky Q box 3. Sets the Portta to '1' (the port the Sky optical is connected to) And so on for the other inputs...with the HDMIs all still terminating on the Q9FN for video. I can still tell that the underlying issue is still there as if the Portta doesn't switch ports for some reason, audio will be picked up via the Q9FN from the Sky Q HDMI and is still ridiculously delayed. Good luck!
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