Soundbar Audio Codecs: What You Need to Know

What Are Audio Codecs on a Soundbar Listing?

An audio codec is a format used to encode and decode digital sound. On a soundbar listing, the codec names tell you which audio formats the bar can accept from your TV, streaming device, or game console. Listings often mention codecs in the title, bullet points, or specifications section.

Knowing which codecs a soundbar supports helps you match it to your source devices. For example, if you watch Blu‑ray discs or stream from services that use Dolby Atmos, you need a soundbar that lists Dolby Atmos support. If you connect a game console, you may want support for DTS:X or Linear PCM.

The channel layout of a soundbar also affects which codecs it can decode. A 2.0 bar may handle stereo PCM, while a 5.1 or Atmos bar can process multi‑channel streams. See our guide to soundbar channels to understand what the numbers mean.

Common Codecs You Will See

The most frequently listed codecs on soundbar listings are:

• Dolby Digital – A lossy codec used on DVDs, broadcast TV, and streaming. It supports up to 5.1 channels.
• Dolby Digital Plus – An enhanced version used by streaming services. It can carry up to 7.1 channels and is often paired with Dolby Atmos metadata.
• DTS – A lossy codec found on many DVDs and Blu‑rays. It supports up to 5.1 channels.
• PCM (Pulse‑Code Modulation) – An uncompressed format. Most soundbars accept two‑channel PCM over HDMI or optical. Multi‑channel PCM (up to 7.1) requires HDMI eARC.

Lossless and Immersive Codecs

Higher‑end soundbars support lossless and object‑based codecs that deliver more detail and height effects. These codecs require an HDMI connection with eARC (enhanced Audio Return Channel) to pass the full bitrate.

Object‑based codecs like Dolby Atmos and DTS:X add height channels and let sound move around the room. If you are deciding between the two, our Dolby Atmos vs DTS:X comparison explains the differences in listing terms.

• Dolby TrueHD – Lossless codec used on Blu‑ray discs. It can carry Dolby Atmos metadata.
• DTS‑HD Master Audio – Lossless codec used on Blu‑ray discs. It can carry DTS:X metadata.
• Dolby Atmos – Object‑based codec that adds height channels. It can be delivered over Dolby Digital Plus (lossy) or Dolby TrueHD (lossless).
• DTS:X – Object‑based codec similar to Dolby Atmos. It uses height and surround objects and can be delivered over DTS‑HD Master Audio.

How to Check Codec Support on a Listing

Start by reading the listing title. Many sellers include codec names such as “Dolby Atmos” or “DTS:X” in the title. Next, scan the bullet points or the “Features” section. Look for phrases like “Dolby Digital decoding,” “DTS support,” or “HDMI eARC.”

If the listing does not mention a codec, check the manufacturer’s product page. The maker’s site usually lists supported audio formats in the specifications table. You can also search for the model name plus “specifications” to find the official page.

Remember that a soundbar may support a codec only over certain connections. For example, Dolby Atmos may work over HDMI but not over optical. Always verify the connection type required for each codec. Our HDMI ARC vs eARC guide explains which connection carries which formats.

For Bluetooth streaming, the codec support is separate. Many bars only list SBC and AAC, but some add aptX or LDAC. The soundbar Bluetooth codecs article goes into more detail.

HDMI and Bluetooth Codec Support

HDMI eARC is the connection that enables lossless and object‑based codecs. As described on the HDMI Licensing Administrator site, eARC “supports the most advanced audio formats and highest audio quality” and is backward compatible with earlier HDMI versions. If you want Dolby TrueHD or DTS‑HD Master Audio, your soundbar and TV must both support eARC.

For wireless streaming, Bluetooth codecs matter. The Bluetooth Classic radio is used for audio streaming and supports codecs such as SBC (mandatory), AAC, aptX, and LDAC. A listing may mention “aptX” or “AAC” to indicate higher‑quality wireless audio. The Bluetooth Special Interest Group explains that Bluetooth Classic is “mainly used to enable wireless audio streaming.” Check the listing’s connectivity section for Bluetooth codec names.

The table below gives a quick overview of what you can expect from each connection. Keep in mind that the actual codec support is always stated on the listing or the maker’s page.

What to Pick for Your Situation

Use the table below to choose a soundbar based on the codecs you need. Each row links to a buying guide that compares soundbars on stated details.

If you are also wondering about subwoofer placement or rear speakers, our subwoofer placement guide and rear speakers worth it article can help you plan the full setup. Remember that the codec list is only one part of the decision; the number of speakers and the connection options matter too.

What to Pick for Your Situation

Questions

Do all soundbars support Dolby Atmos?

No. Dolby Atmos is a feature that must be listed in the title or specifications. Many soundbars support only Dolby Digital or DTS. Check the listing for the words “Dolby Atmos” or “Atmos.”

What is the difference between Dolby Digital and Dolby Digital Plus?

Dolby Digital is a lossy codec that supports up to 5.1 channels. Dolby Digital Plus is an enhanced version that supports up to 7.1 channels and can carry Dolby Atmos metadata. Streaming services often use Dolby Digital Plus.

Do I need eARC for DTS:X?

Yes, to get the full lossless DTS:X experience you need HDMI eARC. Some soundbars may accept DTS:X over regular ARC in a lossy form, but the listing should specify the required connection.

Can I get Dolby Atmos over optical?

No. Optical cables do not have enough bandwidth for Dolby Atmos. You need HDMI ARC or eARC to pass Dolby Atmos. Some soundbars may accept Atmos over HDMI only.

What Bluetooth codecs should I look for?

SBC is mandatory on all Bluetooth audio devices. AAC is common for Apple devices. aptX and LDAC offer higher bitrates. Look for these names in the listing’s connectivity section.

How do I know if a soundbar supports PCM?

Most soundbars support two‑channel PCM. Multi‑channel PCM (5.1 or 7.1) requires HDMI eARC. Check the listing for “PCM” or “multi‑channel PCM” in the audio format list.

What if the listing does not mention any codec?

If no codec is stated, the soundbar likely supports basic Dolby Digital and DTS. For advanced codecs, check the manufacturer’s product page or contact the maker.

Can I use a soundbar with a TV that does not have HDMI eARC?

Yes. The soundbar will still work over HDMI ARC or optical, but you will be limited to lossy codecs like Dolby Digital and DTS. Lossless codecs require eARC on both the TV and the soundbar.