Fix TV AVR Lip-Sync Audio Delay

If voices lag behind the picture, add audio delay (lip-sync delay) in your TV or AVR until speech lines up. If voices come before the picture, reduce delay—or switch the delay control to the device that can remove delay (some TVs can only add delay, not subtract it). The most reliable approach is to pick one device to “own” lip-sync, disable extra syncing elsewhere, and then fine-tune in small millisecond steps.

Identify what “out of sync” actually means

Lip-sync errors aren’t all the same, and the fix depends on direction:

• Audio late (most common): lips move first, dialogue arrives after. Fix is to delay the video less (enable low-latency video mode) or delay the audio more (add ms of audio delay).
• Audio early: dialogue arrives first, lips catch up later. Fix is to delay the audio less (reduce ms) or increase video processing (rarely desired). If your TV only adds audio delay, you may need to move the correction to the AVR/source.

A quick reality check: people often notice sync errors most on close-up talking heads, news anchors, and simple dialogue scenes—because your brain is trained to spot mouth timing.

Why lip-sync breaks in TV + AVR setups

In most home systems the video path and audio path don’t take the same amount of time.

Common reasons the picture gets delayed:

• TV image processing (motion smoothing, noise reduction, upscaling, HDR tone mapping).
• Certain “cinema” picture modes that trade speed for processing.
• Frame-rate conversion or judder reduction.

Common reasons audio gets delayed:

• Audio decoding and post-processing (surround upmixing, room correction, dynamic range features).
• Wireless audio hops (Bluetooth, some Wi-Fi speaker links).

In a typical AVR setup, the TV is doing heavy video work while the AVR is handling audio—so the picture ends up late compared to audio, which means you usually need to delay audio to match.

Decide where to set the delay: TV or AVR

You want one primary place to correct lip-sync. Two places can work, but it often turns into “chasing the problem” because each adjustment interacts with the other.

Use this rule of thumb:

Prefer the AVR’s audio delay when:

• You use multiple sources (cable box, console, streamer) into the AVR.
• Your TV’s A/V sync control is limited (for example, only adds delay or has coarse steps).
• You want one consistent correction across inputs.

Most AVRs label this setting as Audio Delay, A/V Sync, or Lip Sync, and it’s typically adjustable in milliseconds. Many also support automatic lip-sync behavior where the system compensates based on reported display latency. (On Denon models, for example, “Audio Delay” is designed specifically to “compensate for incorrect timing between video and audio,” and includes an auto lip-sync on/off option.) (manuals.denon.com)

Prefer the TV’s A/V sync control when:

• You route audio from TV to AVR via ARC/eARC and switch sources on the TV itself (built-in apps, antenna, etc.).
• Your AVR is essentially acting like an amplifier while the TV is the “hub.”
• The sync problem only appears on internal TV apps.

If you can’t decide, pick one device, set the other to neutral/default, and test. The goal is to avoid stacking delays unintentionally.

Turn off the settings that secretly change timing

Before adjusting milliseconds, eliminate features that commonly create “moving targets”:

1. Disable motion interpolation (often called MotionFlow, TruMotion, Auto Motion Plus, etc.). These features can change video latency scene-to-scene.
2. Try Game Mode / Low Latency mode on the TV. This reduces video delay—often dramatically—so it can instantly change (or solve) lip-sync. If you enable it and audio becomes late instead of early, that’s a clue you were compensating for TV video processing before.
3. Disable extra audio processing temporarily on the AVR: surround upmixers, “virtual” modes, heavy dynamic processing. These can add variable delay. Once you’re synced, re-enable features one by one and confirm sync remains acceptable.
4. If you use a streaming box, check for any match frame rate or audio processing toggles that may alter timing between apps.

You’re trying to reach a stable baseline where the required delay is consistent.

Use a repeatable test to dial in the exact delay

Do not tune lip-sync on random scenes that cut rapidly. Use something predictable:

• A close-up of a person speaking in a well-lit shot (news, interviews).
• A scene with sharp consonants (p, t, k) where mouth closure is obvious.
• A test clip where a click/beep aligns with a flash (if you have one available).

Then adjust in small steps:

• Start with 20–40 ms changes until you’re close.
• Then fine-tune in 5–10 ms steps.

What “perfect” looks like: the start of speech (especially plosives like “p” and “b”) should coincide with the mouth opening/closing movement, not noticeably before or after.

Make auto lip-sync work for you (and know its limits)

HDMI has mechanisms to help devices coordinate A/V timing automatically. Newer HDMI features also aim to improve how devices communicate latency. (hdmi.org)

In practice, “auto lip-sync” can be inconsistent because:

• Some TVs report only an average delay rather than the exact delay for the active picture mode.
• The reported latency can change when you switch HDR modes, refresh rates, or processing features.
• Different inputs/apps may still behave differently.

If you enable auto lip-sync and the result is “close but not perfect,” keep auto enabled and apply a small manual offset if your device supports it. If auto produces inconsistent results across modes, turn it off and use a fixed manual delay.

ARC/eARC routing: the most common sync pitfall

When your TV is the source (built-in streaming apps) and audio goes out via ARC/eARC to an AVR or sound system, lip-sync depends heavily on the TV’s handling of timing. This is where you’ll often find a TV-side “Digital Audio Output Delay” or “A/V Sync” control.

If the TV only lets you add delay and you have audio late (dialogue behind lips), the TV-side control can’t fix it by itself. In that case:

• Look for an AVR setting that can reduce or bypass added delay.
• Try a TV audio output format that reduces processing overhead.
• Disable features that add extra buffering in the TV’s audio path.

The key is matching whichever side is slower—usually video—by delaying the faster side.

App-by-app differences: when one delay setting isn’t enough

Sometimes lip-sync looks fine on one app and wrong on another. That usually points to one of these:

• Different output formats (stereo vs surround vs Atmos) triggering different decode paths.
• Different frame rates (24p movies vs 60p UI) changing video pipeline latency.
• Different device paths (internal TV app vs external streamer).

Practical approach:

1. Tune lip-sync for your most-used scenario (for many people: streaming movies).
2. If your devices support per-input or per-mode delays, set them accordingly.
3. If not, choose the compromise that makes speech acceptable in the majority of content.

Streaming boxes: don’t ignore built-in calibration tools

Some sources include their own sync calibration that accounts for the display’s latency. For example, Apple TV includes a “Wireless Audio Sync” calibration designed to measure latency and align output timing. (Apple Támogatás)

Even if you’re not using wireless speakers, platform calibration features can reveal whether your mismatch is coming from source timing vs TV processing. If calibration improves things, your earlier “fix” was likely compensating in the wrong place (or fighting automatic adjustments).

A simple “best practice” configuration that usually works

If you want a stable setup without endless tweaking:

1. Pick one hub:
   • AVR as hub: all sources into AVR, one HDMI to TV.
   • TV as hub: sources into TV, eARC/ARC to AVR.
2. Enable only one primary sync control:
   • If AVR is hub, start with TV A/V sync at default and tune AVR Audio Delay.
   • If TV is hub, start with AVR delay at default and tune TV A/V sync.
3. Reduce variable latency:
   • Turn off motion smoothing.
   • Avoid picture modes that add heavy processing.
   • Keep audio processing consistent while tuning.
4. Write down the final value (in ms) and which input/mode it applies to.

Why does this matter

Poor lip-sync makes dialogue harder to understand and increases listening fatigue, especially in speech-heavy content. Once your system is aligned, you can stop “tracking” mouths and focus on the content—and you avoid turning the volume up just to compensate for perceived clarity problems.

Sources

• HDMI latency and synchronization overview (Latency Indication Protocol). (hdmi.org)
• Denon AVR “Audio Delay” / auto lip-sync setting documentation. (manuals.denon.com)
• Apple TV calibration option for syncing audio and video timing. (Apple Támogatás)