I switched my soundbar from optical to HDMI and finally got real Dolby Atmos

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Released Oct 28, 2026, 9:30 AM EDT

Sagar holds a bachelor’s degree in electronic devices engineering from Swami Vivekananda Technical University in Bhilai. He later on finished his MBA in financing and marketing from SSIM, Hyderabad. Sagar is likewise a Google-certified Digital Sales and Marketing expert and has a Six Sigma White Belt in Business. He likewise holds accreditation in SEO, Bing Ads from Microsoft, and Business Analytics.

Sagar began his profession in financing after making an MBA, operating at a leading international corporation in London. His enthusiasm for innovation ultimately led him to move equipments and check out content writing. His journey started with ThemeFoxx, where he found his propensity for streamlining complicated tech subjects. With time, he broadened his know-how, composing for a few of the most widely known tech publications and IT brand names. His bylines now appear in over a lots outlets, consisting of SlashGear, Neowin, TechPP, Android Police, SamMobile, Android Headlines, Guiding Tech, and Tech Wiser.

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I have a number of soundbars in my home, and both of them have a Dolby Atmos logo design printed happily on package. As an audiophile, I presumed that suggested I ‘d get immersive, overhead noise every time I pushed play, with no input required. Getting a Dolby Atmos soundbar is just half the task; the other half is making sure it can really get the signal, and mine could not.

The offender was a thin optical cable television I ‘d never ever believed to concern, and the distinction appeared the minute I switched it for HDMI. Throughout this operation, I found out that optical merely can’t bring Dolby Atmos, no matter what package assures.

If you’re in the very same circumstance, HDMI ARC and eARC are the repair, and you can make the switch in about 10 minutes.

Optical cable television and Dolby Atmos do not go together

There’s a bandwidth issue

Optical audio is excellent, however it is old. You can get at a lot of compressed 5.1 surround noise with an optical cable television, which is rather great if you have a surround-sound speaker system. With sophisticated audio innovation like Dolby Atmos, an optical cable television isn’t enough. Dolby Atmos is a various sort of audio that deals with sounds as things that walk around you in 3D, which takes much more information than optical can bring.

Mentioning numbers, an optical cable television has approximately 3-5 Mbps of bandwidth. Dolby Atmos can’t squeeze through that, as it requires more bandwidth. It just operates in HDMI mode due to the fact that HDMI eARC provides much greater bandwidth, around 37 Mbps (double basic ARC HDMI ).

While surround sound works well, it isn’t the very best method to experience a motion picture indicated for Dolby Atmos. The worst part is having a Dolby Atmos speaker however not using its complete capacity. Before changing to HDMI, the audio felt flat. After changing to HDMI, I might hear rains near me and helicopters zooming previous my head.

HDMI ARC and eARC repair it

ARC suggests Atmos, however compressed

HDMI ARC (Audio Return Channel) has actually been around considering that 2009. It lets your television send out sound back to your soundbar through the very same HDMI cable television that brings video. No 2 cable televisions. It’s likewise a huge action up from optical. ARC can bring Atmos, however just in a compressed type, frequently referred to as Dolby Digital Plus. For a lot of streaming, that’s currently a genuine upgrade since not all material is offered in Dolby Atmos.

If you desire real Dolby Atmos, then HDMI eARC is your choice. eARC means Enhanced ARC. It supports uncompressed 5.1 and 7.1, 32-channel audio, Dolby TrueHD, and Dolby Atmos. With around 37 times more bandwidth than basic ARC, that is the genuine distinction in between “Atmos-ish” and the genuine thing. If you’ve got a 4K Blu-ray gamer, eARC is how its lossless Atmos soundtrack reaches your soundbar.

To switch, keep a couple of things in mind. Not every HDMI port can send out audio back. Search for the port identified ARC or eARC on your television. Utilize the television’s eARC port, which is offered on the majority of contemporary TVs and DVD gamers. Plug the other end into the HDMI eARC/ARC output on your soundbar. In many gadgets, the very first HDMI port is typically the eARC port.

There are likewise a couple of things that you require to toggle:

• You require to switch on HDMI-CEC.

• Set the digital audio output to Auto or Pass-Through.

• Switch on eARC mode, which some soundbar or television menus need.

Menus differ by brand name; search for your television’s menu online.

What will you really hear?

Streaming versus discs

Many streaming apps, be it Netflix, Hulu, Disney +, or Amazon Prime, provide Atmos utilizing Dolby Digital Plus. This is essentially a lossy variation of Atmos. If you wish to take pleasure in real lossless Dolby Atmos noise, you ‘d get it on Blu-ray discs, which utilize Dolby TrueHD.

Will you hear a distinction? There will not be a night-and-day distinction on every program. You’ll still get genuine Atmos, something you will not get over optical. When I played a film with Dolby Atmos, I might hear steps approaching, a battle scene unfolding around me, and other scenes felt dynamic.

The very best part is that you should not quit on your television if it just has plain ARC. According to Dolby, you can get Dolby Atmos noise by plugging your streaming box or console into the soundbar’s HDMI input, then sending out the soundbar’s HDMI output to the television.

Get the very best sound quality

If your soundbar supports Atmos and your Television has an ARC or eARC port, you’ve most likely spent for something you’re not utilizing. Especially, it costs absolutely nothing if you’ve currently got an HDMI cable television. Speaker positioning and space setup matter a lot, and Atmos isn’t like magic on every soundbar. The much better the soundbar, the much better Atmos sound you will have. Still, it’s the most convenient upgrade I’ve made all year.

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