Audio Lag with Avantree Transmitters

Before You Start: Audio lag, echo, or dropouts may be caused by wireless interference, incompatible Bluetooth technology, or TV audio processing.

Step 1 – Reduce Wireless Interference

1. Turn off Bluetooth on nearby phones, tablets, or computers previously paired with the headphones.
2. Keep the headphones within 3 feet (1 meter) of the transmitter.
3. Move the transmitter away from Wi-Fi routers, TV boxes, and other wireless devices.

Step 2 – Check the Bluetooth Audio Codec

Check the aptX, LL, or SBC indicator on your transmitter. The lit indicator shows which Bluetooth audio codec is being used, depending on what your headphones support.

• LL (aptX Low Latency) – Lowest audio delay.
• aptX – Some audio delay may be noticeable.
• SBC – Higher audio delay may be noticeable.

Using AirPods or other standard Bluetooth headphones? Some audio delay is normal because these headphones may not support aptX Low Latency.

Step 3 – Check Your TV Audio Settings

1. Open your TV’s Sound / Audio Settings.
2. Look for Audio Delay, Lip Sync, or AV Sync.
3. Adjust the setting, if available, and test the audio again. Its effect can depend on your TV and audio connection.

Step 4 – Fix Echo Between TV Speakers and Headphones

If you hear the same sound twice, the TV speakers and headphones may be playing it at different times.

• Using headphones only? Mute the TV speakers if your TV allows this without muting the transmitter’s audio.
• Using both together? Check whether your TV can adjust the delay for its speakers and external audio separately.

Still Having Audio Lag?

If the delay continues, contact Avantree Support. Include your transmitter model, headphone brand and model, TV connection type, and whether you hear lip-sync delay, echo, or audio dropouts.