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Opera Plus - Fix No Sound

  • Updated

Before You Start: No sound usually means the headphones aren't connected to the transmitter or the transmitter isn't receiving TV audio. Turn on the Opera Plus transmitter and headphones, set the headphones to TV/BASE, and play a TV channel or video with sound.

Step 1 – Check the Headphone Connection

  1. Set the headphone switch to TV/BASE, not Phone/Bluetooth.
  2. Keep the headphones turned on and near the transmitter. Check the headphone LED.
Solid Blue – Headphones connected. Continue to Step 2.

Headphones not connecting? Follow the pairing guide below.

Opera Plus – Headphone Pairing Guide →

Step 2 – Check the TV Audio Connection

  1. Make sure the TV audio cable is firmly connected at both ends.
  2. Connect the TV's audio OUT port to the transmitter's matching INPUT port, not OUTPUT.
  3. Set the transmitter's input switch to match your cable: HDMI ARC, OPT, or AUX.
  4. Play TV audio and check the transmitter's Audio Signal light.
Solid White – TV audio detected.
Flashing White – No valid TV audio detected. Check Step 3.

Step 3 – Check TV Audio Settings

Open the connection you are using:

HDMI ARC
  1. Connect the TV's HDMI ARC / eARC port to the transmitter's HDMI ARC input.
  2. Set TV Sound Output to HDMI ARC / Receiver.
  3. Set Digital Audio Format to PCM / Stereo.
  4. Turn eARC OFF in the TV settings.
Optical Cable
  1. Connect TV Optical OUT to transmitter OPT IN.
  2. Set TV Sound Output to Optical / Digital Audio Out.
  3. Set Digital Audio Format to PCM / Stereo.
AUX / 3.5 mm
  1. Connect TV Headphone / Audio OUT to transmitter AUX IN.
  2. Select Headphones / Audio Out in TV settings, if needed.
  3. Increase the TV volume.
Find PCM Settings for Your TV →
Step 4 – Check the Volume and Mute
  1. Increase the headphone volume using the + button.
  2. Make sure the headphone Mute function is OFF.
  3. Try another TV channel or video.
No Sound on Certain Apps or Cable Box?

If regular TV audio works but a streaming app, channel, or cable box has no sound, play the affected program and set the TV or streaming device's audio format to PCM / Stereo.

Cable Box Audio Settings →
Still No Sound? Restart
  1. Turn off the transmitter and headphones.
  2. Reconnect the TV audio cable firmly.
  3. Turn on the transmitter.
  4. Switch the headphones to TV/BASE, turn them on, and test again.

Still No Sound?

Tell us your TV model, cable type, and transmitter/headphone LED colors.

Contact Avantree Support →

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