A:Answer Thank you for your inquiry! Your Samsung soundbar switches from eARC to HDMI input because the Rocketfish HDMI switch automatically detects active devices like your PS5 or Sony 4K player and triggers input changes via HDMI-CEC. This causes the soundbar to prioritize the new HDMI signal over the eARC connection. To prevent this, you can disable HDMI-CEC on your devices, connect the switch to your TV instead of the soundbar, or use a switch with manual input selection to avoid automatic switching. Tine | Rocketfish Support