Skip to main content
Sign in
Deutsch Español Français Italiano 日本語（日本） 中文 (香港)
Category List
  • Updated

C81 - Fix No Sound

  • Updated
No sound from your C81 may be caused by headphones that are not connected, an incorrect USB audio output setting, or the wrong audio mode or volume. Follow the 3 steps below to restore audio.
1

Check the C81 Connection Light

Make sure C81 is plugged into your device and your Bluetooth headphones or earbuds are turned on. Check the LED on the C81 adapter.

Solid Blue

Connected using aptX Adaptive or aptX Low Latency.

Flashing Blue

Connected using aptX HD, aptX, or SBC.

Flashing Blue & White

Pairing mode. Headphones are not connected yet.

Solid White

Talk/Call Mode is active.

Solid blue or flashing blue? Your headphones are connected. Continue to Step 2.
Flashing Blue & White? Reconnect Your Headphones
  1. Temporarily turn off Bluetooth on nearby phones or computers that your headphones previously connected to.
  2. Put your headphones or earbuds into Bluetooth pairing mode.
  3. With C81 plugged in, press and hold its multifunction button for about 2 seconds until the LED flashes blue and white.
  4. Keep C81 and your headphones close together.
  5. Wait for a solid blue or flashing blue connection light.
Expected: C81 connects to your Bluetooth headphones.
Review C81 Connection Instructions →
2

Check the Audio Output

  1. Make sure C81 is fully inserted into a compatible USB audio port on your PS5, PC, Mac, or other supported device.
  2. Play a video, game, or music.
  3. Open your device's Sound / Audio Output settings.
  4. Select the C81 USB audio adapter as the output device.
  5. Increase your device's volume.
I'm Using C81 with a PS5
  1. Open Settings → Sound → Audio Output.
  2. Under Output Device, select the C81 USB headset or adapter.
  3. Set Output to Headphones to All Audio.
  4. Start a game and test the sound.
Important: If Output to Headphones is set to Chat Audio only, game audio may not play through your Bluetooth headphones.
I'm Using C81 with Windows
  1. Open Settings → System → Sound.
  2. Under Output, select the C81 USB audio device.
  3. Make sure the output is not muted.
  4. Play music or a video to test.
I'm Using C81 with a Mac
  1. Open System Settings → Sound.
  2. Select Output.
  3. Choose the C81 USB audio device.
  4. Increase the output volume and test audio.
3

Check the Volume and Audio Mode

  1. Increase the volume on your Bluetooth headphones or earbuds.
  2. Increase the volume on your PS5, computer, or audio source.
  3. Check whether C81 shows a solid white LED.
  4. If the LED is solid white, C81 is in Talk/Call Mode. Double-tap the multifunction button to switch audio modes.
  5. Play music or game audio again.
Expected: C81 is connected to your headphones, the correct USB audio output is selected, and sound plays normally.
Still No Sound? Try These Additional Fixes
  1. Unplug C81, then plug it in again.
  2. Restart your Bluetooth headphones and reconnect them to C81.
  3. Try another compatible USB port.
  4. Confirm C81 is selected as your device's audio output.
  5. If pairing still fails, reset C81 and pair your headphones again.
Review C81 Troubleshooting →
Tip: If your headphones connect but audio keeps dropping, check the C81 connection troubleshooting guide.

Still Need Help?

Tell us your headphone brand and model, whether you're using PS5, Windows, Mac, or another device, and what color or pattern the C81 LED shows.

ASK A QUESTION

Comments

0 comments

Related articles

Please sign in to leave a comment.