Fix No Sound After Setup

Quick Check

1. Check the transmitter light

• Solid WHITE: TV audio is detected 
• Flashing WHITE: No TV audio detected → continue to Step 2.

   2. Check the input
.   Make sure the transmitter matches your connection:

• Optical → OPT
• HDMI ARC → HDMI ARC
• AUX → AUX

   3. Check the connection light

• Solid ORANGE: Connected.

• Flashing ORANGE: Reconnect/pair the headphones.

  Headphones: Press and hold the ⏯ button until the LED begins flashing ORANGE.
  Transmitter: Hold the headphones icon on the transmitter. The LED will turn solid ORANGE when connected.

• Solid BLUE: Connected by Bluetooth → double-press the multifunction button to switch to Auracast.

   4. Check your TV audio settings

• Optical: Set Digital Audio Output → PCM. Find your TV brand settings
• HDMI ARC: Select ARC and turn eARC OFF.
• AUX: Select Headphones / Audio Out and turn up the TV volume.

  5. No sound only on Netflix, Prime Video, Roku, Fire TV, etc.?
.   Set the app or streaming device audio to PCM / Stereo:

• Netflix / Prime Video
• Roku / Apple TV / Fire TV / Cable Box

Most Common Reason

The TV is set to an unsupported audio format (Dolby/DTS instead of PCM) or the headphones are not properly connected.

💡 Tip:

After a TV system update, the audio output settings may change automatically. If the sound suddenly stops working, please check that the TV’s audio output is set to PCM. Also try unplugging and reconnecting the audio cables, then restart both the transmitter and the headphones.

Still no sound?

Submit a Support Ticket:  support@avantree.com and include:

● LED behavior (color and flashing pattern)

● Your TV model

● How everything is connected (Optical, AUX, HDMI ARC)