Why Is My Sonos Arc Soundbar Audio Out of Sync With TV Video Lip Sync Delay
- TV audio processing adding latency before sending to soundbar
- HDMI ARC or eARC handshake not syncing properly
- Sonos Arc audio delay setting needs manual adjustment
Problem Description
Your Sonos Arc soundbar audio does not match the video on your TV. Voices are heard before or after lips move on screen creating a distracting lip sync delay. The delay may be constant or vary depending on the content or streaming app.
Symptoms
- Audio arrives before or after video by a noticeable amount
- Lip movements on screen do not match spoken words
- Delay is worse on some streaming apps than others
- Delay only occurs through the soundbar not TV speakers
- Audio sync was fine initially but gradually became worse
- Switching inputs or apps temporarily fixes then returns
Recognize these? Here's what usually causes it.
Common Causes
- TV audio processing adding latency before sending to soundbar
- HDMI ARC or eARC handshake not syncing properly
- Sonos Arc audio delay setting needs manual adjustment
- TV game mode or motion smoothing adding video processing delay
- Dolby Atmos decoding adding extra latency on some content
- CEC timing issue between TV and soundbar
Most fixes happen in the first 3 steps.
Do not change audio delay settings while Dolby Atmos content is playing. Switch to standard stereo content first to calibrate then test with Atmos content. Atmos adds its own processing layer that can confuse calibration.
Tools & Requirements
These tools will help you complete this fix.
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Step-by-Step Solution
Adjust Sonos Audio Delay
Open the Sonos app and go to Settings then System then your Sonos Arc. Tap Audio Delay or Lip Sync Correction. Use the slider to add or subtract delay in 10ms increments. Play a video with visible speech and adjust until lips match audio. The range is typically plus or minus 75ms. Most TVs need 20 to 40ms of added audio delay to sync properly.
Configure TV Audio Settings
On your TV go to Sound Settings and set Audio Output to HDMI ARC or eARC. Disable any audio processing effects like virtual surround or dialog enhancement on the TV side. Set Audio Format to Pass Through or Bitstream so the TV sends unprocessed audio directly to the Arc. Processing on both the TV and soundbar doubles the latency. Let the Sonos Arc handle all audio processing.
Needed for this step
Certified HDMI 2.1 Cable 6FT, 8K HDMI eARC Cord...
$9.90Enable Game Mode on TV
TV picture processing modes like motion smoothing and noise reduction add video latency that creates audio sync issues. Enable Game Mode or Filmmaker Mode on your TV which disables most picture processing and reduces video delay to match audio timing. This is especially effective for streaming apps that already apply their own video processing before sending to your TV.
Check HDMI Connection
Ensure you are using the HDMI ARC or eARC port on your TV not a standard HDMI port. Use a certified HDMI 2.1 cable for eARC support. A damaged or low-quality HDMI cable can cause timing inconsistencies. Try replacing the cable. If using ARC with Dolby Atmos content switch to eARC which has higher bandwidth and better sync handling for advanced audio formats.
Power Cycle Both Devices
Unplug both your TV and Sonos Arc from power simultaneously. Wait 60 seconds. Plug in the TV first and wait for it to fully boot. Then plug in the Sonos Arc. This forces a fresh HDMI CEC handshake between the two devices which often resolves sync drift that accumulates over time. After reconnecting test lip sync on multiple apps.
Quick Solutions
Still having issues? This is usually the deeper cause below.
If pairing fails after multiple attempts, the device may still be registered to a previous account — factory-reset it before trying to add it to a new one.
Use a YouTube lip sync test video to precisely calibrate the audio delay setting. Search for lip sync test on YouTube and adjust the Sonos slider until the clap sound perfectly matches the visual.
Pairing failures almost always come down to distance during the initial handshake — manufacturers seriously understate how close you actually need to be.
- TV audio processing adding latency before sending to soundbar
- HDMI ARC or eARC handshake not syncing properly
- Sonos Arc audio delay setting needs manual adjustment
- TV game mode or motion smoothing adding video processing
- Dolby Atmos decoding adding extra latency on some content
Before you go — try one of these (they fix most cases).
Most popular upgrades chosen by Sonos Arc owners.
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Official Manufacturer Manual
Sonos provides official product documentation through their online manual rather than downloadable PDF. Access setup guides, troubleshooting steps, and product specifications for your Sonos Arc.
Source: sonos.com
Need More Help? Sonos Support
Note: The contact information below connects you directly to Sonos's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.
