Soundbar HDMI 2.1 Gaming Features: VRR and ALLM

What VRR and ALLM mean on a soundbar listing

Variable Refresh Rate (VRR) and Auto Low Latency Mode (ALLM) are part of the HDMI 2.1 specification. According to the HDMI Licensing Administrator, VRR reduces or eliminates lag, stutter, and frame tearing for more fluid gameplay. ALLM allows the ideal latency setting to be set automatically for smooth, lag-free interactivity. These features are designed for gaming, but they also apply to movies and video.

On a soundbar listing, these terms indicate that the soundbar can pass the VRR and ALLM signals from a gaming console or PC to the TV without blocking them. The soundbar itself does not generate or process these features; it acts as a conduit. When a listing says "HDMI 2.1" or names VRR and ALLM, it means the soundbar's HDMI inputs support the bandwidth and signaling needed for these features. For a soundbar to pass 4K at 120Hz or 8K signals, it needs HDMI 2.1 bandwidth, which also enables VRR and ALLM.

However, not every soundbar that mentions HDMI 2.1 supports all gaming features. Some HDMI 2.1 soundbars may only handle lower bandwidth or may not include VRR and ALLM in their feature set. Reading the full specifications on the maker's page helps you confirm exactly which gaming features are supported.

Do you need a soundbar with VRR and ALLM?

Whether VRR and ALLM matter on a soundbar depends on how you connect your gaming device. Most gamers connect a console or PC directly to the TV's HDMI input and send audio to the soundbar via HDMI ARC or eARC. In that setup, the soundbar does not handle the video signal, so VRR and ALLM are irrelevant to the soundbar. The TV receives the VRR and ALLM signals directly from the console, and the soundbar only carries audio back from the TV through the ARC or eARC connection.

If you connect your console to the soundbar's HDMI input and then run an HDMI cable from the soundbar's output to the TV (HDMI passthrough), the soundbar must support HDMI 2.1 with VRR and ALLM to pass those signals to the TV. Without support, the soundbar may block or degrade the features, causing screen tearing or higher input lag. This setup is less common but may be needed if your TV has limited HDMI inputs or if you want to manage fewer cables.

For most people, connecting the console directly to the TV is simpler and avoids compatibility questions. The soundbar only needs HDMI ARC or eARC to carry audio from the TV. This approach also works with any soundbar, regardless of its HDMI version. If you need to route through the soundbar because of TV input limitations or cable management, then a soundbar with HDMI 2.1 and VRR/ALLM support becomes important.

Many soundbars on this site are the best HDMI ARC soundbars, which are ideal for direct-to-TV connections. For those who want passthrough capability, the best premium soundbars often include HDMI 2.1 features.

How to check if a soundbar supports VRR and ALLM

Start by reading the listing title. Some soundbars include "HDMI 2.1" or "VRR" in the title. If the title does not mention it, check the bullet list or feature section of the listing. Look for phrases like "HDMI 2.1 input", "supports VRR", "ALLM compatible", or "gaming features". These terms are usually placed near the connection details.

If the listing does not state VRR or ALLM, visit the maker's official product page. The specifications table often lists HDMI version and supported features. For example, a soundbar with HDMI 2.1 inputs may support VRR and ALLM, but not always. Some HDMI 2.1 soundbars only pass video at lower bandwidths. Confirm by looking for explicit mention of VRR and ALLM in the feature list.

When in doubt, contact the seller or the maker's support team. Ask whether the soundbar passes VRR and ALLM signals when used in a passthrough configuration. The answer will tell you if the soundbar is suitable for your gaming setup. Keep your console model and TV model ready, as the question may require specific compatibility details.

For a general recommendation, the best soundbars on this site are compared on stated details, so you can see which ones list HDMI 2.1 features. If you are also interested in immersive audio, the best Dolby Atmos soundbars often include HDMI 2.1 inputs as well.

HDMI passthrough and connection options

HDMI passthrough means the soundbar sits between your gaming device and the TV. The console connects to the soundbar's HDMI input, and the soundbar's HDMI output connects to the TV. This allows the soundbar to process audio while passing video through. For this to work with VRR and ALLM, the soundbar must support those features and have sufficient HDMI bandwidth.

HDMI eARC is a separate feature that carries audio from the TV back to the soundbar. Even if you use passthrough, you may still need eARC for the best audio quality from the TV's apps. HDMI ARC is the older version and supports fewer audio formats. Both are explained in the HDMI ARC vs eARC guide.

If you connect your console directly to the TV, you do not need passthrough. The soundbar only uses ARC or eARC for audio. This is the simplest setup and works with any soundbar that has an ARC or eARC port. The best HDMI ARC soundbars list will help you find a model that matches your budget and audio needs.

For a gaming setup with a projector, the connection may differ because projectors often have limited HDMI ports. In that case, a soundbar with passthrough might be necessary. The soundbar with projector setup guide offers more detail on that scenario.

What to look for in a soundbar for gaming

Beyond VRR and ALLM, consider the soundbar's connection options. HDMI eARC is important for high-quality audio from the TV. If you use passthrough, ensure the soundbar has enough HDMI inputs for your devices. Also check if the soundbar supports 4K at 120Hz or 8K passthrough, which are common with HDMI 2.1.

For audio, look for Dolby Atmos or DTS:X support if you want immersive sound in games. A soundbar with a separate subwoofer and rear speakers can enhance the gaming experience, but those features are separate from VRR and ALLM. The best soundbar with separate subwoofer and best soundbar with rear speakers guides compare models on these features.

Remember that the soundbar's primary job is audio. VRR and ALLM are video-related features. If you prioritize low input lag and smooth visuals, connecting your console directly to the TV is the most reliable method. The soundbar then only needs HDMI ARC or eARC for audio. Always follow the maker's manual for volume settings and listening habits. For guidance on hearing protection, refer to the NIDCD page on noise-induced hearing loss.

What to pick for your situation

Questions

Can I use VRR if my soundbar does not support it?

Yes, if you connect your console directly to the TV. The soundbar only needs HDMI ARC or eARC for audio. VRR works between the console and TV without involving the soundbar.

Is HDMI 2.1 necessary for gaming on a soundbar?

Only if you plan to pass the video signal through the soundbar. If you connect the console to the TV directly, HDMI 2.1 is not needed on the soundbar. HDMI ARC or eARC is sufficient for audio.

How can I tell if a soundbar supports ALLM?

Look for "ALLM" or "Auto Low Latency Mode" in the listing or on the maker's specifications page. Some soundbars list it under gaming features or HDMI 2.1 details.

Does a soundbar with HDMI 2.1 always support VRR and ALLM?

Not always. HDMI 2.1 includes many features, and a soundbar may implement only some of them. Check the product page for explicit mention of VRR and ALLM support.

Will a soundbar add input lag if I use passthrough?

This article does not cover latency measurements. For specific latency figures, refer to the soundbar's manual or contact the maker. The HDMI specification includes Quick Frame Transport (QFT) to reduce latency, but implementation varies.

What is the difference between VRR and ALLM?

VRR synchronizes the display's refresh rate with the console's frame rate to eliminate tearing and stutter. ALLM automatically switches the TV to its lowest latency mode when a game starts, reducing input lag. Both are part of the HDMI 2.1 specification.