Before You Start: No sound may occur if the headphones are disconnected, the TV audio settings are incorrect, or the transmitter is not receiving audio. Turn on the Duet Aura transmitter and headphones, then play a TV channel or video with sound.
Step 1 – Check the Headphone Connection
Keep both headphones turned on and near the transmitter. Check the headphone LED:
Solid Orange – Connected to Auracast. Continue to Step 2.
Flashing Orange – Searching for the Auracast connection.
Headphones not connecting? Follow the pairing guide below.
Duet Aura – Headphone Pairing Guide →Step 2 – Check the TV Audio Connection
- Make sure the TV audio cable is firmly connected at both ends.
- Set the transmitter's input selector to match your cable: HDMI ARC, OPT, or AUX.
- Play TV audio and check the transmitter's Audio Signal light.
Solid White – TV audio detected.
Flashing White – No TV audio detected. Check Step 3.
Step 3 – Check TV Audio Settings
Open the connection you are using:
HDMI ARC
- Connect the HDMI cable to the TV's HDMI ARC port.
- Select HDMI ARC / Receiver as the TV Sound Output.
- Set the audio format to PCM / Stereo.
Still no sound? Try disabling eARC in the TV settings while keeping regular ARC enabled.
Optical Cable
- Connect TV Optical OUT to transmitter OPTICAL INPUT, not OUTPUT.
- Set TV Sound Output to Optical / Digital Audio Out.
- Set the audio format to PCM / Stereo.
AUX / 3.5 mm
- Connect TV Headphone / Audio OUT to transmitter AUX INPUT.
- Select Headphones / Audio Out in TV settings, if needed.
- Increase the TV volume.
Step 4 – Check the Volume
- Increase the volume on both headphones.
- Make sure the TV program is not muted.
- Test each headphone separately.
No Sound on Certain Apps or Cable Box?
If regular TV audio works, play the affected program and set the TV or streaming device's digital audio format to PCM / Stereo.
Cable Box Audio Settings →Still No Sound? Restart
- Turn off the transmitter and both headphones.
- Reconnect the TV audio cable firmly.
- Turn on the transmitter, then both headphones.
- Wait for the solid orange headphone lights and test again.
Still No Sound?
Tell us your TV model, cable type, and transmitter/headphone LED status.
Contact Avantree Support →
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