---
title: "How to Fix Bluetooth Audio Delay | sync.video"
description: "Why Bluetooth headphones lag behind the picture, how to reduce the delay on Windows, Android, iPhone, Mac and TVs, and how to measure it in milliseconds."
url: https://sync.video/bluetooth-audio-delay
---

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# How to fix Bluetooth audio delay

Wireless headphones always add some delay. Here is how to shrink it on each kind of device, measure what is left and cancel it where a setting allows.

To fix Bluetooth audio delay, first make the link as fast as it can be (a low-latency codec or mode, an up-to-date device, the headphones close by), then cancel whatever delay is left with an AV sync setting in the TV, streaming box or app. Bluetooth can’t be made instant: sound is compressed, sent in small packets and buffered in the earbuds so it doesn’t break up, and that buffer is the delay you notice.

Most video apps on phones and computers already allow for it, which is why a film can look fine while a game or a video call does not. When something does lag, measure it with the [audio delay test](https://sync.video/audio-delay-test) using the **Microphone** method, with an earbud held next to the microphone, and type the number into the setting described below. If the lag is baked into a video you recorded with a Bluetooth microphone, the file itself needs fixing: see [fix audio sync](https://sync.video/fix-audio-sync).

Where the delay comes from: the picture goes straight to the screen, while the sound passes through decoding, a soundbar or receiver, and a Bluetooth link, each adding milliseconds.

## How to reduce and cancel Bluetooth delay

1. ### Measure it first
Connect the headphones to this device, open the delay test above with **Bluetooth** selected, press **Allow the microphone** and **Measure** with an earbud right next to the microphone. Note the result.
2. ### Speed up the link
Turn on any low-latency or game mode in the headphones’ app, update the headphones and the phone or computer, keep them within a few metres, and on Android try another codec in Developer options.
3. ### Measure again
Press **Measure again**. If the number dropped a lot, the faster mode was worth it; leave it on for watching.
4. ### Cancel the rest
Type what is left into the TV’s, streaming box’s or player’s AV sync setting, or press **Use this offset on this device** if you are using the sync player.

## Why Bluetooth audio lags

Classic Bluetooth audio squeezes the sound with a codec, sends it over a radio link that shares the air with Wi-Fi, and buffers it in the earbuds so a dropped packet doesn’t become a click. Bigger buffers mean fewer drop-outs and more delay. Earbuds also have to keep left and right in step, which adds more.

__Bluetooth codecs and their delay (typical figures; your headphones may differ)__
| Codec                  | Where you find it                                               | Delay                                                         |
| ---------------------- | --------------------------------------------------------------- | ------------------------------------------------------------- |
| SBC                    | Every Bluetooth audio device: the fallback                      | Typically among the highest                                   |
| AAC                    | iPhone, iPad and Mac with most headphones; many Android phones  | Typically similar to SBC, varies by phone                     |
| aptX and aptX Adaptive | Many Android phones with Qualcomm chips                         | Adaptive and Low Latency variants are designed for less delay |
| LDAC                   | Many Android phones; Sony headphones                            | Higher quality, not lower delay                               |
| LC3 (LE Audio)         | Newer phones, Windows 11 PCs and headsets that support LE Audio | Designed for lower delay than classic codecs                  |

Codec names tell only part of the story: the earbuds’ own buffering often matters more. A dedicated game or low-latency mode in the headphones’ app is usually the biggest single improvement.

## Device by device

### Windows 11

* If both the PC and the headset support LE Audio, turn on **Use LE Audio when available** in Settings → Bluetooth & devices → Devices, under Device settings. It needs Windows 11 22H2 or later and drivers from the PC maker; if the switch isn’t there, the PC doesn’t support it.
* Update the Bluetooth driver from the PC maker’s site, and keep the headset close to the PC.
* For games, a wired headset or the headset’s own USB dongle is far faster than Bluetooth.

### Android

* Turn on Developer options (tap Build number seven times in About phone), then look for the Bluetooth audio codec setting and try the codecs your headphones support. The menu’s position varies by phone maker.
* Use the headphones’ app for a game or low-latency mode.
* Some phones offer a media or game mode for Bluetooth in their sound settings; the names vary.

### iPhone, iPad and Mac

Apple’s devices pick the codec themselves and offer no latency setting. Video apps compensate on their own, so films usually look right; games and live audio show the lag. Keeping the software up to date and the headphones close is what you can do.

### TVs and streaming boxes

* On Fire TV devices, **AV Sync Tuning** under Settings → Display & Sounds → Audio plays a bouncing ball and a tone to line up; with a Bluetooth device connected it shows “Tuning Mode: Bluetooth”.
* Sony BRAVIA TVs can adjust Bluetooth delay with the **A/V sync** setting (on recent models under Settings → Display & Sound → Audio output → Audio system settings).
* Samsung says there are no settings that fix Bluetooth or wireless speaker sync on its TVs; use the TV’s speakers or a wired soundbar for watching if the delay bothers you.
* Other TVs: look in the sound settings for an AV sync, lip-sync or audio delay option, and check whether it applies to Bluetooth output.

## When the recording is the problem

A Bluetooth microphone delays your voice before the phone even records it, so a video filmed with wireless earbuds as the microphone carries that delay in the file forever. No setting on the playback side can know about it. Open the file in the [audio sync fixer](https://sync.video/fix-audio-sync), move the sound **Earlier** until it matches, and export a corrected copy.

1. Record a clap at the start of each take.
2. Use **Jump to the clap** and **This frame is the clap** to set the exact offset.
3. Use the same number for other clips from the same setup: the delay of one microphone is usually steady.

## Questions about Bluetooth audio delay

### Why do my Bluetooth headphones lag in games but not in films?

Video apps know the headphones’ delay and hold the picture back to match, so lips and words line up. Games can’t wait, because they react to what you press, so the delay shows.

### Which Bluetooth codec has the lowest latency?

Codecs designed for it, such as aptX Low Latency, aptX Adaptive’s low-latency mode and LE Audio’s LC3, usually beat SBC and AAC. The headphones’ buffering matters as much as the codec, so measure your own pair.

### Can I get rid of Bluetooth delay completely?

No. Some delay is part of how Bluetooth works. You can make it small and then cancel it with an AV sync setting, or use a wired connection or a low-latency dongle where timing matters most.

### How do I measure my headphones’ delay?

Connect them to your phone or computer, open the [audio delay test](https://sync.video/audio-delay-test), choose **Microphone**, hold an earbud next to the microphone and press **Measure**. You get a figure in milliseconds.

### Why does the delay change from day to day?

Headphones enlarge their buffer when the radio link is poor (a crowded room, a phone in a back pocket), and shrink it when it is clean. Measure in the place you usually listen.

### Does a Bluetooth transmitter help with a TV?

A transmitter that supports a low-latency codec, paired with headphones that support the same codec, usually cuts the delay a lot. If either side lacks it, both fall back to a slower codec.

## More in fix audio sync

* [ Fix audio and video out of sync Work out whether the file or the playback is at fault, then fix the delay or measure it. ](https://sync.video/fix-audio-sync)
* [ Test your audio delay A flash and beep, a microphone chirp or tapping: a latency figure in milliseconds. ](https://sync.video/audio-delay-test)
* [ Fix audio delay on a TV or soundbar The AV sync setting on Samsung, LG, Sony, Fire TV and Apple TV, and how to measure it. ](https://sync.video/audio-out-of-sync-on-tv)
* [ Fix YouTube audio out of sync Browser and app fixes for viewers, and a corrected file for creators before upload. ](https://sync.video/youtube-audio-out-of-sync)
* [ Fix streaming audio out of sync One app, one show or every app? Find the cause and the fix for streaming lag. ](https://sync.video/streaming-audio-out-of-sync)
* [ Sync audio and video online Drop one video to fix its delay, or several files to line them up by their sound. ](https://sync.video/)