HDMI Lip Sync is a technology that automatically aligns audio and video, eliminating synchronization issues between these signals. This is especially useful when audio is processed faster than video, and delays become noticeable when watching movies, sports broadcasts, or playing games. This feature was first introduced in HDMI version 1.3 and is now widely supported in modern TVs, AV receivers, and soundbars.
Key facts about HDMI Lip Sync:
- Automatically aligns audio and video signals using the LIP protocol.
- HDMI ARC and eARC technologies help transmit audio more efficiently and reduce delays.
- Certified HDMI cables and devices ensure better performance.
- Manual audio delay adjustment allows for even more precise synchronization.
To avoid sync issues, it is important to use HDMI 1.3 or higher devices and, if necessary, perform manual settings. Read more about how to properly install and use this feature below.
How HDMI Lip Sync Works
Signal processing and delay compensation
HDMI Lip Sync technology ensures that audio and video are perfectly synchronized, even when their processing speeds are different [5] [1] . When the video signal is processed slower than the audio, the system automatically applies the necessary delay to the audio signal so that both reach the viewer at the same time. This process is facilitated by the Latency Indication Protocol (LIP), which allows source devices to determine the appropriate delay correction, especially when using a complex system with multiple devices [1] .
HDMI ARC and eARC integration
The system’s efficiency is further enhanced by the integration of ARC technology. HDMI ARC (Audio Return Channel) and eARC (Enhanced Audio Return Channel) allow audio signals to travel back from the TV to an AV receiver or soundbar over a single HDMI cable [1] . eARC technology offers higher data throughput and supports high-quality audio formats such as Dolby Atmos and DTS:X , which allows for even more precise audio-video synchronization. Using ARC or eARC reduces the number of cables and makes it easier to compensate for delay.
Use of certified devices
To ensure flawless synchronization, it is essential to use certified devices. Even small delays can ruin the viewing experience, so certified devices are essential because they meet strict standards for signal quality and latency [4] . Uncertified or poor quality HDMI cables can cause additional delays or signal distortion, which can interfere with synchronization.
AUTOGARSAS.LT offers high-quality certified HDMI cables and devices that are optimized for optimal HDMI Lip Sync performance in your home theater systems. It is also important to use devices that support HDMI 1.3 or later, as only then can Lip Sync functions be used [4] . By regularly updating your software, you will maintain compatibility with the latest HDMI standards and improve synchronization quality [3] . In the next section, we will discuss how certifications further contribute to smooth synchronization.
HDMI Lip Sync Setting
Enabling HDMI Lip Sync
Enabling HDMI Lip Sync depends on the type of device you're using. On TVs, this feature is usually found in the sound settings. For example, on LG and Sony TVs, go to Settings > Sound > AV Sync and enable automatic sync. If your TV supports HDMI 1.3 or higher, Lip Sync often turns on automatically.
On AV receivers, this feature is usually hidden in the HDMI or audio settings menu. On Yamaha , Denon , and Marantz models, which you can find on AUTOGARSAS.LT , the settings are called “Lip Sync” or “Audio Delay.” On Sony receivers, look for the “A/V Sync” setting. To make sure everything works smoothly, make sure the feature is enabled on both the source device and the receiver.
The location of the settings on soundbars varies by manufacturer. Many models have a dedicated button on the remote or you can find the feature in their app. Some soundbars automatically detect latency via the HDMI ARC or eARC connection and make corrections without any additional steps.
Manual delay adjustment
If automatic HDMI Lip Sync doesn't fix the sync issues, you can adjust the audio delay yourself. Most devices allow you to change the delay from 0 to 300 ms.
Look for settings like “Audio Delay” or “Lip Sync Adjustment” on your TV or AV receiver. It’s recommended to start with 40-60ms and adjust by observing your lips during dialogue until the synchronization is accurate. It’s best to use content where lip movements are clearly visible, such as news programs or movies with a lot of dialogue.
If you're using an HDMI eARC connection, this standard transmits more precise timing information, so devices often automatically adjust for processing delays. However, sometimes minor manual adjustments may be necessary.
If manual settings don't help, it's worth trying the tips below.
Solving common problems
Constant audio lag can occur when multiple devices, such as a TV, AV receiver, or soundbar, are performing processing. In such cases, allow only one device to perform delay correction.
Don't forget to update your devices' software, which may resolve syncing issues. Also, use certified HDMI cables to ensure better signal transmission.
On game consoles, turn off image enhancements such as motion smoothing or noise reduction, as they increase processing time. Set your TV to Game Mode or PC Mode, which reduces lag.
If your devices do not support HDMI Lip Sync or do not have the ability to manually adjust, consider purchasing an external audio delay controller or upgrading your device to one that supports HDMI 1.3 or later.
When testing for sync, use content that has clear dialogue and watch for lip movements to match the audio. If issues persist, connect sources directly to your TV or receiver to determine which device is causing the delay.
Multi-device and home system compatibility
Home automation system integration
Modern home automation systems allow for centralized control of HDMI Lip Sync across all rooms and devices. Since signal processing delays can vary from room to room, the LIP standard's capabilities help to automatically compensate for these differences. This is especially useful when trying to ensure smooth audio and video synchronization throughout the home.
In Lithuania, where the metric system is the most common, automation solutions need to be tailored to local needs. For example, a central AV receiver connected via HDMI eARC to multiple TVs and speakers in different rooms can automatically manage synchronization settings for each zone. This ensures that sound effects and dialogue always match the image, regardless of the device or room size.
The AUTOGARSAS.LT team offers professional consultations and installation services that perfectly meet the needs of Lithuanian homes. Here is what client Rita says about their work:
"I bought a music sound system for my home at a car audio store, the employees consulted, selected the best option, installed and adjusted everything. I am extremely satisfied with the result. A big THANK YOU to the team! I recommend it :)" [6]
In multi-room systems, the automation platform not only ensures audio and video synchronization, but also adapts settings to the room's acoustics and usage. The standards that help to harmonize different devices are discussed below.
Compatibility standards and requirements
HDMI CEC (Consumer Electronics Control) technology allows devices from different manufacturers to communicate with each other and coordinate settings. This is especially convenient in multi-device systems, where a single remote control can control the entire network.
HDMI ARC and eARC standards ensure high-quality audio transmission and support automatic Lip Sync adjustment. HDMI eARC in particular, which offers higher data throughput and supports more advanced audio formats, allows for more accurate synchronization even in complex systems with multiple devices or high-definition content [1] [4] .
| Standard | Sound transmission | Lip Sync correction | Device management | Multi-device support |
|---|---|---|---|---|
| HDMI ARC | Limited | Basic/manual | No | Limited |
| HDMI eARC | High (supports advanced formats) | Automatic | No | Wide |
| HDMI-CEC | N/A | N/A | Yes (centralized) | Wide |
These standards ensure that system components operate smoothly and without interference. Studies show that properly implemented HDMI Lip Sync reduces viewer complaints about audio and video mismatches by up to 90% [3] . Professionally installed systems using certified equipment and standards such as eARC have the lowest synchronization error rates.
To ensure optimal performance, it is recommended to use certified HDMI 2.1 cables and compatible equipment. Customer Daiva shares her experience:
"If anyone is setting up a new house, I recommend consulting with the "Autogaras" team! They sincerely advised how and what wires to run, where and what speakers to place or connect. They put everything together on the project, and later installed the equipment. A true team of professionals!!!" [6]
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Manufacturer Comparison: Lip Sync Features
Feature comparison table
AUTOGARSAS.LT offers a wide range of high-end audio and video solutions from Yamaha , Denon and Marantz . All of these manufacturers ensure smooth audio and video synchronization, but each has its own advantages and solutions. AUTOGARSAS.LT experts ensure that all offered products meet the highest synchronization standards.
Let's take a look at how each manufacturer implements Lip Sync features to make your home theater system work flawlessly.
Yamaha offers MusicCast , a system that allows you to control Lip Sync settings in multiple rooms simultaneously. The latest Yamaha models, such as the RX-A8A series, automatically detect and compensate for audio delays with an accuracy of 1 ms. This is especially useful in complex home theater systems that use projectors or multi-level speaker systems.
Denon and Marantz , both part of the Sound United group, use similar technology, so their Lip Sync functionality is very similar. However, the Marantz models feature more precise manual calibration, which allows you to customize the sync to your individual needs.
All of these manufacturers offer adjustment in 1 ms increments, ensuring maximum accuracy.
| Manufacturer | Automatic Lip Sync | Manual adjustment | HDMI ARC | HDMI eARC | Multi-room integration |
|---|---|---|---|---|---|
| Yamaha | Yes | Yes | Yes | Yes | MusicCast |
| Denon | Yes | Yes | Yes | Yes | HEOS |
| Marantz | Yes | Yes | Yes | Yes | HEOS |
These differences allow you to choose the equipment that best meets the needs of your home system.
All three manufacturers support HDMI eARC, which provides high data throughput. Yamaha devices automatically synchronize connected devices, while Denon and Marantz allow for more precise manual calibration, which is especially popular with professionals.
AUTOGARSAS.LT recommends choosing equipment that supports both automatic and manual Lip Sync settings. Such equipment not only ensures smooth operation, but is also adapted to future technologies. Professional installation and calibration guarantee that your audio and video synchronization will be flawless, and the entertainment experience will be of the highest level.
How To Perfectly Set Lip Sync Calibration In Your Home Theater
Conclusions
HDMI Lip Sync technology not only ensures smooth audio and video synchronization, but also provides a seamless entertainment experience. It automatically aligns signals, eliminating the need to manually adjust settings. This feature is especially useful when watching movies, watching sports broadcasts, or playing games, where accuracy and synchronization are essential.
Using certified devices, audio-visual lag is reduced to just 12 ms [2] , and professional solutions ensure flawless synchronization. This means that every detail – from dialogue to on-screen action – fits together purposefully.
Integration is also an important part of this process. AUTOGARSAS.LT, with over 27 years of experience in the field of audio and video systems, offers comprehensive solutions - from consultations to complete system design and installation. Their specialists ensure that each device is properly configured and seamlessly integrated into your home system.
Investing in HDMI eARC-enabled devices, along with professional installation, pays off with a quality entertainment experience. The Yamaha, Denon and Marantz devices offered by AUTOGARSAS.LT ensure reliable HDMI Lip Sync operation and meet the latest standards.
Properly implemented HDMI Lip Sync technology turns your home theater into a true entertainment center, where sound and image merge into a harmonious whole.
FAQs
How to choose the right HDMI cable to ensure smooth audio and video synchronization with HDMI Lip Sync?
For HDMI Lip Sync to work smoothly, it is important to use a high-quality HDMI cable that meets the latest standards, such as HDMI 2.0 or higher. Such cables ensure fast and stable data transfer, which is necessary for smooth audio and video synchronization.
AUTOGARSAS.LT offers a wide selection of HDMI cables , suitable for home theater systems. When choosing a cable, pay attention to its length, supported resolution (e.g. 4K or 8K) and additional features, such as Ethernet support. If you are not sure which cable will best suit your needs, our specialists are always ready to help you.
How to fix the most common HDMI Lip Sync problems?
HDMI Lip Sync technology was designed to keep the audio and video moving in sync on the screen. However, sometimes problems can occur, such as audio lag or video out of sync. The most common causes of these problems are incorrect settings or incompatible devices.
To resolve these issues, first make sure that your devices support the HDMI Lip Sync feature and that it is enabled on both audio and video devices. If that doesn't work, check that you are using a high-quality HDMI cable and consider updating your devices' software. If the issues persist after these steps, we recommend contacting AUTOGARSAS.LT specialists. They can help you find the most appropriate solution and ensure that your audio and video work flawlessly.
Does the HDMI Lip Sync feature work with all devices, or is special equipment required?
HDMI Lip Sync is designed to automatically match the audio and video, eliminating any possible mismatch between them. However, for this feature to work, both your video device (such as a TV or projector) and your audio equipment (amplifier or sound system) must support HDMI Lip Sync technology.
Before using this feature, it is worth reviewing the technical specifications or user manual of your devices. If you have any doubts about compatibility, AUTOGARSAS.LT specialists can help you select the right devices and ensure that your home theater system runs smoothly.
