Apple TV 4K Wireless Audio Sync uses an iPhone near the wired TV or receiver speakers to measure timing and align supported wireless output. Start from Settings > Video and Audio > Calibration. This is a speaker-chain calibration task, not a universal correction for every source’s lip-sync.
Confirm that the arrangement matches the tool
Record the Apple TV, HDMI-connected TV or receiver, wired speakers and wireless destination. Have the eligible iPhone available and follow the on-screen requirements. Apple describes this tool for a supported arrangement where wired and wireless output can sound offset. A programme whose audio and picture are already mismatched on one ordinary speaker route needs a different initial check.
Keep any player-level delay value in the record. Adding a calibration while an unexplained manual correction remains active can make the result difficult to interpret. Coordinate with the owner before changing an established home-theatre configuration.
Choose the comparison that fits the symptom
Listen to each supported route separately, then compare the combined route. Use the same permitted passage and keep existing delay settings in the record.
| Observation | Useful direction |
|---|---|
| Both routes acceptable alone; combined output echoes | Check the documented combined-chain calibration. |
| One route silent alone | Resolve its connection or format before timing. |
| Both routes show the same source lip-sync error | Investigate source/player timing separately. |
| Two independent feeds are offset | Use the live-delay workflow. |
Follow the calibration sequence
Use the current Apple guide and actual model prompts. The iPhone listens to the calibration signal, so its location matters.
- Open Video and Audio on Apple TV and move to Calibration.
- Select Wireless Audio Sync.
- Follow the iPhone prompts and hold the phone near the TV or receiver’s wired speakers as directed.
- Allow the generated tones and measurement sequence to finish.
- Return using the remote’s supported Back or Menu control.
Compare single and combined output
After calibration, repeat the combined and single-route comparison. Record the speaker chain and any remaining duplicate sound. A problem confined to one programme needs its own source timing check.
Retest when the chain changes
The expected result is better alignment in the documented speaker arrangement. Keep the hardware route and calibration outcome together so a later move through a different receiver or TV input can be assessed accurately. Ask Apple or the equipment publisher about an incomplete calibration. Ask the player or provider about a source that remains internally misaligned across otherwise working outputs.