HDMI ARC lets your TV send audio back to a soundbar or receiver instead of just receiving video and sound

HDMI ARC stands for Audio Return Channel. On a normal HDMI cable, your TV receives video and audio from a device like a cable box or streaming player. With ARC, the TV can also send audio back through the same cable to a soundbar, receiver, or other audio equipment. This eliminates the need for a separate audio cable running from your TV to your speakers.

The practical difference: instead of plugging your soundbar into your TV with both an HDMI cable (for video) and an optical audio cable (for sound), you use one HDMI ARC cable. Your TV takes the audio from any source—whether it's built-in apps, cable, or an antenna—and sends it to the soundbar automatically.

HDMI ARC has been around since 2009, but many people don't use it because they don't know it exists or because their TV and soundbar aren't connected the right way. The setup is straightforward once you know which port to use and which settings to turn on.

Key Takeaways

  • HDMI ARC uses a specific port on your TV (usually labeled ARC or eARC) to send audio back to a soundbar or receiver through one cable instead of two.
  • Not all HDMI ports on your TV support ARC—you must use the correct port, which is almost always HDMI 3 or HDMI 4.
  • You need to turn on ARC in your TV's audio settings and sometimes in your soundbar's settings for it to work.
  • eARC is a newer version that handles more audio formats and higher quality sound, but regular ARC works fine for most home setups.

Which HDMI port supports ARC on your TV

Your TV has multiple HDMI ports, but only one (sometimes two) supports ARC. On most TVs made in the last ten years, this is HDMI 3 or HDMI 4. Some newer TVs label it as HDMI 3/ARC or HDMI 4/eARC. Check your TV's manual or look at the ports themselves—manufacturers sometimes print "ARC" or "eARC" next to the correct port.

If you plug your soundbar into HDMI 1 or HDMI 2, ARC will not work, and you'll need to use a separate optical audio cable. This is the most common setup mistake. The port matters because ARC requires a different electrical signal path than regular HDMI, and only one port on your TV is wired that way.

If you can't find which port is ARC, check your TV's settings menu. Most TVs have a section called Audio or Sound that shows which HDMI port is set as the ARC port. You can also contact the TV manufacturer with your model number—they'll tell you when ready.

How to set up HDMI ARC in your TV settings

Once your soundbar is plugged into the correct HDMI port, go to your TV's settings menu. Look for a section called Sound, Audio, or External Speakers. Inside that menu, find an option that says "HDMI ARC" or "HDMI eARC" and turn it on. The exact wording and location varies by TV brand—Samsung calls it "HDMI Audio Out," LG calls it "HDMI ARC," and Sony calls it "Audio Return Channel."

After you turn on ARC in the TV settings, your soundbar should automatically detect the connection. Some soundbars also have a setting to enable ARC, usually found in their own menu or app. Check your soundbar's manual if sound doesn't come through after you've enabled ARC on the TV.

Test it by playing something on your TV—a streaming app, cable channel, or antenna broadcast. The audio should come through your soundbar instead of the TV's built-in speakers. If it doesn't, go back to your TV's audio settings and make sure the soundbar is selected as the output device.

The difference between ARC and eARC

eARC (enhanced Audio Return Channel) is a newer version released in 2016. The main difference is speed and audio format support. Regular ARC can handle standard surround sound formats like Dolby Digital 5.1. eARC can handle newer formats like Dolby Atmos and DTS:X, which create more immersive sound with overhead speakers.

For most people, this difference doesn't matter. If you have a basic soundbar or a 5.1 receiver, regular ARC is fine. If you have a high-end soundbar with Atmos support or a newer receiver, eARC will let you use those features when watching streaming services or Blu-ray movies.

Your TV needs to support eARC to use it, and so does your soundbar. If either device only supports regular ARC, you'll get regular ARC performance. There's no downside to having eARC—it's backward compatible, meaning eARC devices work fine with regular ARC devices.

Why ARC is better than separate audio cables

Before ARC, connecting a soundbar meant running two cables from your TV: HDMI for video (if you wanted to use the TV's apps) and an optical audio cable for sound. This created clutter and meant your soundbar only got audio when you used the TV's built-in apps, not when you plugged in a cable box or game console.

With ARC, one cable handles everything. Your TV collects audio from any source—built-in apps, cable boxes, game consoles, antennas—and sends it all to the soundbar through that single HDMI cable. You also get one remote to control volume instead of juggling your TV remote and soundbar remote.

The only real limitation is that ARC only works when your soundbar is connected to the TV's ARC port. If you plug a device directly into your soundbar's HDMI input, ARC doesn't explore—the soundbar gets audio the normal way. This is fine for most setups, but it's worth knowing.

Common reasons ARC stops working

If your ARC setup suddenly stops working, the most common cause is that ARC got turned off in your TV's settings. This sometimes happens after a software update. Go back to your audio settings and confirm ARC is still enabled.

The second most common issue is using the wrong HDMI port. If you moved your soundbar to a different port for any reason, ARC won't work unless you move it back to the ARC port. Check which port your TV's manual lists as the ARC port and verify your soundbar is plugged into that one.

A third possibility is a loose cable. HDMI cables can work partially loose without falling out completely. Unplug the HDMI cable from both the TV and soundbar, wait five seconds, and plug it back in firmly. This fixes many connection issues.

If none of these work, try a different HDMI cable. Some older or damaged cables don't support ARC even if they work for regular video. HDMI cables are cheap, and swapping it out takes two minutes.

When you might not want to use ARC

ARC is convenient, but it's not the right choice for every setup. If you have a receiver with multiple HDMI inputs and you're plugging several devices into it (cable box, game console, streaming device), it's often better to plug everything into the receiver and run one HDMI cable from the receiver to your TV. The receiver handles all the switching, and your TV just displays the picture.

You also don't need ARC if you only use your TV's built-in apps and don't plan to connect other devices. In that case, a straightforward soundbar with a 3.5mm audio cable or Bluetooth connection works fine and costs less.

If your TV doesn't support ARC or your soundbar is very old, you're not missing much by using an optical audio cable instead. Optical cables are reliable, cheap, and work with almost any TV and soundbar combination. The main trade-off is one extra cable and slightly less convenience.

Frequently Asked Questions

Do I need a special HDMI cable for ARC?

No. Any standard HDMI cable works with ARC. You don't need to buy a special "ARC cable." However, if your current cable is old or damaged, it might not support ARC reliably. Try a different cable before assuming ARC is broken.

Can I use ARC if my soundbar is connected wirelessly?

No. ARC requires a physical HDMI cable connection. If your soundbar only has Bluetooth or WiFi, you'll need to use a different audio connection method, like an optical cable or a 3.5mm aux cable from your TV.

Will ARC work with my cable box or game console?

Only if they're connected to your TV. ARC sends audio from your TV to your soundbar, not directly from other devices. If you plug a cable box into your soundbar's HDMI input instead of your TV's, ARC doesn't explore—the soundbar gets audio the normal way.

What if my TV has ARC but my soundbar doesn't?

You can still use them together, but you'll need a separate audio cable. Plug the soundbar into the ARC port with an HDMI cable for video, then run an optical or 3.5mm audio cable from your TV's audio output to the soundbar. This gives you the video benefit of HDMI without the audio return feature.

Does ARC improve sound quality?

ARC itself doesn't improve sound quality—it's just a way to send audio through one cable instead of two. The sound quality depends on your soundbar and the audio format being used. eARC supports newer formats like Dolby Atmos, which can sound better if your soundbar supports it.