Opera Plus - Fix No Sound – Avantree Support

Before You Start: No sound may be caused by disconnected headphones, incorrect TV audio settings, or a loose audio cable. Play a TV program or video with sound, then follow these steps.

Step 1 – Restart Devices & Check Headphone Connection

Turn OFF the TV, transmitter, and headphones. Turn them back ON, starting with the TV.
Set the headphone switch to TV / BASE.
Check the headphone LED.

Solid BLUE – Headphones connected. Continue to Step 2.

Headphones not connecting? Duet headphones use 2.4 GHz wireless, not TV Bluetooth. Follow the Opera Plus Headphones Reconnection Guide →

Step 2 – Check the Audio Signal & TV Settings

Play a TV program or video with sound. Check the transmitter’s Audio Signal LED.

Solid WHITE – TV audio detected.

Flashing WHITE – No valid TV audio detected. Check the settings below.

Choose your TV connection and follow the matching instructions.

Optical – TV Connection

Important – Set your TV audio format to PCM / Stereo.
Why PCM? PCM allows the Opera Plus transmitter to receive and play TV audio correctly. Dolby, DTS, Bitstream, Auto, or Pass Through may cause no sound.

Open your TV’s Settings → Sound / Audio:

Set Sound Output to Optical / Digital Audio Out.
Set Digital Audio Format to PCM / Stereo.

Find PCM Settings for Your TV →

HDMI ARC – TV Connection

Set the TV’s audio output to HDMI ARC / Receiver / External Speaker.
Set the digital audio format to PCM / Stereo.
If your TV has an eARC setting, turn eARC OFF.

AUX / 3.5 mm – TV Connection

Set your TV’s Sound Output to Headphones / Audio Out, if required.
Increase the TV volume and make sure it is not muted.

Step 3 – Check the Cable & Volume

Check the cable connection: Use only one audio connection (HDMI ARC, Optical, or AUX). Make sure the cable is securely connected to both the TV and transmitter.
- Optical: Connect to the transmitter’s OPT IN (Input from TV).
- HDMI ARC: Connect to the transmitter’s HDMI ARC INPUT.
- AUX / 3.5 mm: Connect to the transmitter’s AUX IN (Input from TV).
Input Selector: Set the transmitter to match your connection: HDMI ARC, OPT, or AUX.
Volume: Increase the headphone volume. If using AUX, also increase the TV volume.
Test: Try another TV channel or video. If there is still no sound, try a new cable of the same type.

Still No Sound?

Contact Avantree Support and include your TV brand and model, connection type, and the LED status on your headphones and transmitter.

Contact Avantree Support →