How to Fix Soundbar Audio Out of Sync

If your soundbar audio is out of sync with what's happening on screen, you're not alone. Soundbar audio out of sync is one of the most common complaints among home theater users, and the good news is that it's almost always fixable without calling a technician. Whether you're watching a movie, streaming a show, or gaming, that slight delay between lips and words — or sound effects and action — can completely ruin the experience. This guide covers every practical fix, from quick one-click adjustments to deeper settings changes.

Before diving in, it helps to understand that audio sync problems aren't always caused by the soundbar itself. Your TV's processing, the connection type, streaming app buffering, and even your display's refresh rate can all contribute. For users who've connected their soundbar via HDMI, it's also worth reading about HDMI ARC vs eARC differences for soundbars — the connection standard you're using directly affects how audio is transmitted and timed.

Why Soundbar Audio Goes Out of Sync

Understanding the root cause is half the battle. Audio sync issues happen when the audio signal and video signal take different amounts of time to reach your eyes and ears. Modern TVs process video through multiple stages — upscaling, noise reduction, HDR tone mapping — each of which adds milliseconds of delay. Your soundbar, meanwhile, receives the audio signal and plays it almost immediately. The result: sound arrives before (or after) the picture it belongs to.

TV Processing Delay

This is the most common culprit. High-end TVs with advanced picture processing pipelines can introduce anywhere from 50ms to over 200ms of video latency. When audio is sent directly to the soundbar without a matching delay applied, you'll notice lips moving out of time with dialogue. The technical term for this is audio-to-video synchronization (A/V sync), and it's a well-studied problem in broadcast and home theater engineering.

Connection Type Matters

How your soundbar is connected dramatically affects whether sync problems occur and how severe they are. Optical (Toslink) connections are one-way and carry no timing data — they're particularly prone to sync drift. Bluetooth introduces its own latency, typically 100–300ms, which is almost always noticeable. HDMI ARC and eARC connections are generally the best for keeping things in sync, as they support bi-directional communication and can pass timing information back and forth. If you're having frequent sync issues over Bluetooth or optical, switching to HDMI ARC is often the single most effective fix.

Quick Fixes to Try First

Before adjusting any settings, always start with the basics. These steps resolve the majority of soundbar audio out of sync issues and take less than five minutes.

Power Cycle Your Devices

Turn off your TV, soundbar, and any connected source devices (streaming stick, cable box, game console). Unplug everything from the wall — not just standby off, but fully unplugged. Wait 60 seconds. Plug back in and power up in this order: source device first, then soundbar, then TV. This clears any buffered state in the HDMI handshake and often resolves sync drift that has accumulated during long sessions.

Check and Re-seat Cables

A loose HDMI or optical cable can cause intermittent sync problems that come and go unpredictably. Unplug each cable from both ends, inspect the connectors for bent pins or debris, then firmly re-seat them. If you're using an older HDMI cable, try swapping it for a new one rated for at least HDMI 2.0 — cheap or aging cables can cause handshake issues that manifest as audio sync drift.

Using Audio Delay Settings

Most modern TVs and soundbars include built-in audio delay controls. These let you manually offset the audio signal forward or backward in time to match the video. This is the most targeted fix for sync issues caused by TV processing pipelines.

Adjust Audio Delay on Your TV

Navigate to your TV's audio settings menu. Look for options labeled "Audio Delay," "A/V Sync," "Audio Sync," or "Lip Sync." The exact path varies by brand:

• Samsung: Settings → Sound → Expert Settings → Digital Output Audio Delay
• LG: Settings → Sound → AV Sync Adjustment
• Sony: Settings → Display & Sound → Audio Output → A/V Sync
• Vizio: Menu → Audio → Lip Sync

Start by increasing the delay in small increments (10–20ms at a time) while watching a scene with clear speech. Stop when lips and audio are in sync. If audio is arriving before the video (you hear sounds before you see the action), decrease the delay instead.

For a deeper dive into this specific adjustment, our full guide on how to fix soundbar audio delay walks through the process step-by-step for all major TV brands.

Soundbar Lip Sync / Audio Delay Controls

Many soundbars also have their own sync controls, accessible either through a physical button on the remote or within the soundbar's companion app. On Samsung soundbars, look for a "Sync" button on the remote that cycles through delay presets. On Sony and LG models, the soundbar app usually offers a slider. If your soundbar lacks these controls, adjusting the TV-side delay is your primary tool.

Users with LG soundbars specifically should also check out the guide on how to reset an LG soundbar — a factory reset can sometimes clear persistent sync calibration bugs that manual adjustment doesn't fix.

HDMI ARC and eARC Fixes

HDMI ARC (Audio Return Channel) is the recommended connection for most soundbars, but it can introduce its own set of sync-related quirks, especially when CEC (Consumer Electronics Control) is involved.

Disable and Re-enable CEC

CEC allows your TV to communicate with and control the soundbar automatically. When this handshake goes wrong, it can cause audio to drop, stutter, or fall out of sync. Try disabling CEC on your TV (sometimes called Anynet+, Bravia Sync, SimpLink, or HDMI Control depending on brand), waiting 30 seconds, then re-enabling it. This forces the devices to renegotiate their connection, which often resolves sync timing issues.

Switch Audio Format

Complex audio formats like Dolby Atmos or DTS:X require more processing than standard stereo or Dolby Digital 5.1. On some TV/soundbar combinations, decoding these formats introduces additional latency. Try changing your TV's audio output format:

• Go to your TV's audio output settings
• Change from "Auto" or "Bitstream" to "PCM" (stereo)
• Test sync — if it improves, the issue is format-related processing
• You can then try "Dolby Digital" specifically to see if that format works without sync issues

This is especially useful if the sync problem only occurs with certain content (like Atmos movies but not regular TV) rather than everything you watch.

Adjusting TV Picture Settings That Affect Sync

Video processing features are often the hidden cause of soundbar audio out of sync problems. Every enhancement your TV applies to the picture adds processing time, and that time is time the audio has already been delivered to your soundbar.

Enable Game Mode

Game Mode on modern TVs disables most picture processing enhancements in order to reduce input lag for gaming. As a side effect, it dramatically reduces the video delay that causes sync issues — typically bringing latency down from 80–150ms to under 15ms. Even if you're not gaming, enabling Game Mode while watching movies can resolve persistent sync drift. You'll sacrifice some picture processing (local dimming, motion enhancement, etc.), but on a good TV the difference is usually subtle.

Disable Motion Smoothing

Motion smoothing (called "Motion Plus" on Samsung, "TruMotion" on LG, "MotionFlow" on Sony) uses frame interpolation to create intermediate frames, which adds noticeable processing delay. Disabling it — or at least reducing the strength to "Low" — can reduce video latency by 20–40ms and bring audio back into alignment. Look for this setting in your TV's picture or advanced picture menu.

Other picture settings worth disabling when troubleshooting sync: noise reduction, dynamic contrast, HDR tone mapping (if toggleable), and any "AI" or "Smart" picture modes. Disable them one at a time and test sync after each change to isolate which feature is causing the delay.

Advanced Fixes and When to Reset

If the steps above haven't resolved your soundbar audio out of sync problem, it's time to look at firmware and factory reset options. These are more drastic but often necessary for persistent or worsening sync issues.

Factory Reset the Soundbar

A factory reset wipes the soundbar's stored settings and calibration data, returning it to its out-of-box state. This can fix sync issues caused by corrupted settings or a botched firmware update. The process varies by brand — most soundbars have a combination of buttons you hold for 5–10 seconds, or a reset option in the companion app. After resetting, re-pair or reconnect the soundbar, then go through the setup process before testing sync again. Avoid applying any custom audio settings during initial testing so you're working from a clean baseline.

If you're still experiencing problems connecting your soundbar to other devices after a reset, our guide on how to fix soundbar Bluetooth not pairing covers the reconnection process for common brands.

Update Firmware

Soundbar and TV manufacturers regularly release firmware updates that fix known bugs, including audio sync issues. Check for updates on both devices:

• TV: Settings → Support → Software Update → Check Now
• Soundbar: Check the manufacturer's companion app, or visit the support page for your model and download the update file to a USB drive

After updating both devices, test sync from scratch before applying any manual delay settings. Sometimes the firmware update itself solves the problem, and a manual delay offset you had dialed in before the update may now cause audio to arrive early rather than late.

If you want to go deeper on optimizing your entire soundbar setup — not just sync — the guide on how to set up a soundbar for best sound quality covers placement, EQ settings, and connection optimization in detail.

For comprehensive help from our team, visit our dedicated service page: How to Fix Soundbar Audio Out of Sync — it includes a full diagnostic checklist and brand-specific instructions.