Fix: No Sound with a Bluetooth Headset on CarPlay or Android Auto

Applies to: CHIGEE displays using CarPlay or Android Auto with a Bluetooth headset/intercom.

Key idea: With CarPlay/Android Auto, audio comes from your phone to your headset. The CHIGEE display does not output app audio.

How it should be connected

Pair your headset to your iPhone (only). Do not pair the headset to the CHIGEE display.
Audio path: CHIGEE Display ⇔ iPhone ⇔ Bluetooth Headset

Pair your headset to both the phone and the CHIGEE display.
- Phone ⇔ Headset = music, nav prompts, phone call audio
- CHIGEE Display ⇔ Headset = microphone path for voice commands/assistant
Audio path: Phone ⇔ Headset and CHIGEE Display ⇔ Headset

Select the headset as the active output.
- iPhone (CarPlay): Open Control Center → long-press Now Playing → tap the AirPlay (triangle/circles) icon → pick your headset.
  - Bonus (new iOS 26 setting): If CarPlay keeps stealing your headphone audio, enable Settings → General → AirPlay & Continuity → Keep Audio with Headphones.
- Android (Android Auto): Press Volume → tap the output icon; or swipe down for Quick Settings → Media output → select your headset.
  - On Samsung Galaxy it’s explicitly labeled Media output in Quick Panel.
Turn up all volumes.
- Phone media volume, headset volume, and app/nav guidance volume (many apps have a separate slider).
- Disable Mute/Silent or Do Not Disturb/Focus modes.
Disconnect extra Bluetooth devices.
- Cars, speakers, BMW TFT, second intercoms can “steal” audio. Turn them off and test.
Power-cycle & re-pair.
- Reboot phone and display; toggle your headset off/on.
- If needed: Forget the headset on the phone, re-pair cleanly.

Settings → Bluetooth → your headset ⓘ → ensure it’s set as Headphone and “Connect for This iPhone” is enabled.
In Apple/Google Maps, verify Voice Guidance is On (not muted).

Settings → Bluetooth → your headset → ensure Media audio (A2DP) is On (and Call audio (HFP) if you take calls).
Some Android skins kill background apps—allow Android Auto, Bluetooth, and your music/nav apps to run unrestricted.

Intercom/mesh vs. music (A2DP): Some headsets lower/disable stereo music while in intercom modes. Switch to a mode that allows A2DP, or turn off intercom during navigation/music.
Multipoint pairing: Make the phone that runs CarPlay/Android Auto the primary device on the headset.

On the phone, Forget the headset.
On the headset, clear pairing memory (follow the headset manual).
Reboot phone and CHIGEE.
CarPlay: pair Headset ⇔ iPhone only, then start CarPlay.
Android Auto: pair Headset ⇔ Phone, confirm music plays; then pair Headset ⇔ CHIGEE display for the mic path; start Android Auto.

Test the phone ⇔ headset alone (without CHIGEE). If that fails, the issue is phone/headset.
Try a different headset or different phone to isolate.
Update phone OS, headset firmware (if available), and CHIGEE firmware.
Android users: avoid Android Auto Beta—use the stable release.