Harmony A1 - Fix No Sound – Avantree Support

Before You Start: No sound may mean the speaker is not connected to the transmitter, the transmitter is not receiving audio, or the volume is too low. Follow these steps to find and fix the problem.

Step 1 – Check the Auracast Speaker Connection

Solid Orange – The speaker is connected and receiving audio.

Flashing Orange – The speaker is not receiving audio.

Turn on the Harmony A1 transmitter and speakers.
Keep the speakers near the transmitter while they connect.
If a speaker keeps flashing orange, turn it off and back on. Keep it near the transmitter and wait a few seconds for it to reconnect. The speaker LED should turn solid orange.

Note: The speakers must be in Auracast mode (orange LED) to connect to the transmitter. If a speaker flashes red and blue, it is in Bluetooth mode and will not connect to the transmitter. Double-click the speaker’s Mode button to switch to Auracast mode.

Step 2 – Check the Audio Signal & Transmitter Input

Play audio and check the transmitter’s OPT/AUX input indicator.

Solid White – Audio input detected. Continue to Step 3 →

Flashing Red – No valid audio signal. Check the settings for your selected input below.

Choose the input that matches your audio source.

Optical

Press the transmitter’s AUX/OPT button to select OPT.
Set TV Sound Output to Optical / Digital Audio Out.
Set Digital Audio Format to PCM / Stereo.

AUX

Press the transmitter’s AUX/OPT button to select AUX.
Set TV Sound Output to Headphones / Audio Out.
Increase the TV volume.

Bluetooth

Press Phone / Pair on the transmitter to select Phone input.
Press and hold Phone / Pair for about 4 seconds. The indicator flashes red and blue when pairing mode is ready.
Open your phone’s Bluetooth settings, select Avantree Oasis Aura, and play audio.

Find PCM Settings for Your TV →

Why PCM? For Optical connections, the transmitter needs a compatible stereo signal. Set the TV audio format to PCM / Stereo. Dolby, DTS, Bitstream, Auto, or Pass Through may cause no sound.

Step 3 – Check Volume & Restart

Increase the volume on the audio source, transmitter, and speaker.
Make sure the audio source is not muted. Try another channel, video, or app.
For Optical or AUX, check that the audio cable is securely connected at both ends.
If there is still no sound, try a new cable of the same type.
Turn off the transmitter and speaker, then turn them back on and test again.

Still No Sound?

Tell us which input you’re using, the transmitter and speaker indicator status, and whether the speaker connects to the transmitter.

Contact Avantree Support →