Fix No Sound After Setup

No-Sound Troubleshooting

Start with the transmitter's audio signal light. It quickly tells you whether the problem is coming from the TV connection or the headphones.

Start with these checks before resetting anything.

Most no-sound problems are caused by the wrong TV audio output, an unsupported audio format, the wrong transmitter input, or the headphones not being in Base mode.

Quick No-Sound Check

Follow these steps in order. Stop when the sound returns.

Check the Transmitter Audio Signal Light

Play a TV program with sound and look at the transmitter's audio signal indicator.

Solid whiteValid TV audio is detected. Continue to Step 2.

Flashing whiteNo valid audio signal is being detected.

Flashing White? Check TV Connection

Match the Cable and Input Selector

The transmitter input must match the cable connected to your TV.

Optical TV Optical OUT → transmitter Optical input → select OPT/AUX.

HDMI ARC TV HDMI ARC/eARC port → transmitter HDMI ARC connection → select the matching HDMI ARC input.

AUX TV Headphone / Audio OUT → transmitter AUX input → select OPT/AUX.

Make Sure the Headphones Are in Base Mode

Move the headphone mode switch to Base. This is the correct mode when using the headphones with the Crescendo 3D transmitter.

Correct: OFF / Bluetooth / Base

Check the Headphone Connection

The headphone LED should become solid blue when connected.

Reconnect the Crescendo 3D Headphones

Reconnect the Audio Cable

Unplug the audio cable from both the TV and transmitter, then reconnect it firmly. Restart the transmitter and test again.

What You Want to See

The transmitter's audio signal light is solid white, the headphones are in Base mode, and the headphone LED is solid blue.

If the Audio Signal Light Is Flashing White

Open the section that matches how Crescendo 3D is connected to your TV.

Using Optical

TV Sound Output → Optical / Digital Audio Out

Make sure the optical cable is connected to the TV's Optical OUT port, not an input.

Set the TV's Digital Audio Output Format to PCM. Dolby, DTS, Bitstream, Auto, or Pass Through may prevent the transmitter from receiving usable audio.

Find PCM Settings for Your TV

Using HDMI ARC

TV Sound Output → HDMI ARC / Receiver

Connect the transmitter to the TV HDMI port labeled ARC or eARC.

Set the TV's digital audio format to PCM.

If the TV is using eARC and there is still no sound, turn eARC off and test standard ARC.

Find PCM Settings for Your TV How to Disable eARC

Using AUX / Headphone Output

TV Sound Output → Headphones / Audio Out

Make sure the cable is connected to the TV's Headphone or Audio OUT jack.

Increase the TV volume because many TVs control the headphone output level directly.

Sound Works on TV Channels but Not Netflix, Prime Video, Roku, Fire TV, etc.

If normal TV audio works but a specific app or streaming device has no sound, that source may be sending Dolby or another incompatible format.

Change the app, TV, or streaming device audio setting to PCM / Stereo.

Netflix / Prime Video No Sound Streaming Device No Sound

Watch the No-Sound Video Guide

Still Have Questions or Need Help?

Ask us about your Crescendo 3D setup and include your TV model, connection type, and the transmitter's audio signal light behavior.

Ask a Question