The HDMI passthrough is working, why can't I get sound from my headphones? - HAX05

Need to know before you set up:

1. For HDMI ARC, a little "handshake" between devices needs to happen before they can communicate. Therefore, if the soundbar/AVR is not on, the passthrough will NOT work, because the TV does not "see" the HDMI ARC connection. Thus, if you turn on the devices in the wrong order, you'll get no sound.
2. The HAX05 can be powered via HDMI ARC with your soundbar. When you connect the HAX05 to your soundbar, check to see if the power light turns solid RED. If so, the power adapter is no longer necessary. [This lets you avoid handshake issues because the HAX05 is being powered on by the soundbar].

Next, follow this procedure:

1. Make sure you do NOT have anything connected to the DC IN port.
2. On the RCA side, plug a cable from the HDMI ARC OUT port to your soundbar's HDMI ARC port (the handshake happens at this moment).
3. The power light on the other side should be solid RED.
4. On the power side, plug a cable from the HDMI ARC IN port to the TV's HDMI ARC port.
5. Plug your Avantree transmitter to either the OPT or RCA port.
6. Set the ARC soundbar output select switch to ON.
7. The LED on the other side next to the ARC OUT port should be solid GREEN.
8. TV settings are set up correctly. Grab your TV’s remote control, and go to SETTINGS > AUDIO > HDMI ARC > PCM

With this setup, you should be able to get sound from your headphones and the soundbar at the same time!