Since VE1843 use the DIP switch to implement audio embed or de-embed(HDMI audio on), it can de-embed to 3.5mm jack or bypass to HDMI audio on Rx, not both at the same time.

If you set both Tx and Rx HDMI out DIP switch to off， 3.5mm audio in will bypass to 3.5mm audio out.

At the same time HDMI audio in will bypass to HDMI audio out. There will be 2 separated path for 2 audio signals.