Why does not appear the "Dolby Atmos for home theater" option?

Question

Why does not appear the "Dolby Atmos for home theater" option?

Aaron Leonrdo 0

When I connect my laptop (with an RTX 5060 mobile) to my 2023 LG TV with passthrough to my Sonos system (by eARC to the Sonos Beam gen 2) it appears very briefly all the options of spatial audio, Dolby Atmos for home theater, Dolby Atmos for Headphones, Dolby Atmos for built-in speakers, Dolby Atmos for speakers, DTS:X para cine en casa (for home theater, my system is in spanish), DTS Neural:X para altavoces (for speakers), DTS:X for headphones. After that it only appears deactivated, Windows Sonic para auriculares (for headphones) and Dolby Atmos for Headphones (I bought the license), I don't think the best option for home theaters is the Dolby Atmos for headphones version.

Also when I play content in Dolby Atmos (does not matter the codec) through VLC or MPC-HC it does not affect anything (neither the volume) and it passthrough the video and audio but if I want to apply effects with Dolby Access or make a live upmix (by the app/pc/software, not the hardware: sonos soundbar) I can't.

Also the Sonos Beam gen 2 can receive linear PCM up to 7.1 channels but it only appears to support 2 channels and up to 24bit/192khz quality in sound options, with support for DD (Dolby Digital) and DD+ (Dolby Digital Plus) but when I passthrough via mpc-hc it can play audio in LPCM, AC3, E-AC3, TrueHD, Dolby MAT and Dolby multichannel PCM in 7.1 (5.1, 6.1, 3.1, 2.1, 2.0, mono) and Dolby Atmos.

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Answer recommended by moderator

Aaron Leonrdo 0

The solution, for anyone with the same problem, was to use Custom Resolution Utility (CRU) and add the support for 8 channels, Dolby TrueHD, and with that I can finally get 7.1 LPCM real to my system (I checked in the Sonos app), however the Dolby atmos para centro de entretenimiento (for home theater) when I activated, it's still sending 7.1 LCPM unless I play Dolby Atmos content, but like that I can't obtain something like 7.1.4 in Nuendo or like 9.1 or more channels by Dolby Atmos.

Here the steps:

Install CRU
Open it as admin
In the up-left corner select the name of your device
Then double-click in Extension box the CTA-861 section
In the data blocks section edit or add Audio formats to the ones your system you know that support, not others.
And also if your system have more than 2 channels (like 5.1, 7.1, etc) add/edit Speaker setup and then you add your speakers grid, if you have 5.1 or 7.1 the defautls are below the window
After you made those changes click OK to all.
Then in the same folder as CRU.exe is, also there are other files, such as restart64.exe (if your system is x64/64-bit) or restart.exe (if your system is x86/32-bit), it will restart the drivers so the screen can be dark for 5-10 seconds or blink, after that now you can adjust as normally in Windows the audio settings with your modifications.

:)

Hendrix-V 15,345 Reputation points Microsoft External Staff Moderator

2026-06-04T00:33:55.5133333+00:00

Hi Aaron Leonrdo,

Thank you for sharing such a detailed breakdown of your setup and the steps you’ve already taken - it’s very helpful and shows you’ve done thorough troubleshooting.

Your CRU steps are a valid workaround to extend the reported capabilities - adding 8-channel LPCM + TrueHD allows Windows to treat the device as multi-channel > This improves general surround output (7.1 LPCM).

However, it does not fully replicate a native Atmos endpoint because Atmos for home theater relies on bitstream passthrough, not channel-based layouts. The speaker configuration (like 7.1.4) is handled externally by the decoder (soundbar/AVR), not Windows.

If full detection is required (for broader Atmos behavior), use a direct connection where possible: PC > Atmos-capable soundbar / AVR (HDMI input). This allows Windows to detect Atmos capability directly from the audio device.
Aaron Leonrdo 0 Reputation points

2026-06-04T00:47:19.5066667+00:00

I know Atmos is only in bitstream, y thing was more about when mixing in Nuendo/Dolby Atmos renderer in Dolby Atmos, it decodes the signal directly with your system settings to your speaker layer, so the final output is in PCM with channel per channel, but as a Windows limitation of only support 7.1 and no more it is impossible to pass 7.1.4 or more channels, you need to first code the audio in bitstream and the pass the Atmos workflow to the HDMI but as I said it does not make again the mix, is difficult to me pass the ASIO to again the WASAPI and after the Dolby Access make the work again, however, for anyone seeing this and only wanting to listen Apple Music/TV or other Atmos content with this new adjustments (or without it for me, also) now you can listen to real Atmos through your system with doing anything more. :)
Aaron Leonrdo 0 Reputation points

2026-06-04T00:51:54.7033333+00:00

It would be cool if Windows add support to 9.0.6 speaker layers or 7.1.6 or 9.1.4, something like that that can be encoded to TrueHD/E-AC-3 (as they are able to encode up to 15 channels) in real-time (with Dolby Access) or live as Nuendo gives it, to can have the possibility to use HDMI for monitoring instead of the too pricey alternatives our there. It could only function with Dolby codecs if you bought them (explicitly or implicitly with your TV, pc or something in the chain), or in PCM (yet less common) if you don't own them (a license).
Hendrix-V 15,345 Reputation points Microsoft External Staff Moderator

2026-06-04T01:08:04.6366667+00:00

Hi Aaron Leonrdo,

I'm relieved to know that everything is good to go on your side - the setup is valid and suitable for games / general surround. I hope the insights shared in the forum help address your concerns effectively.

2 additional answers

Your answer

Hendrix-V 15,345 Reputation points Microsoft External Staff Moderator

2026-06-04T00:33:55.5133333+00:00

Hi Aaron Leonrdo,

Thank you for sharing such a detailed breakdown of your setup and the steps you’ve already taken - it’s very helpful and shows you’ve done thorough troubleshooting.

Your CRU steps are a valid workaround to extend the reported capabilities - adding 8-channel LPCM + TrueHD allows Windows to treat the device as multi-channel > This improves general surround output (7.1 LPCM).

However, it does not fully replicate a native Atmos endpoint because Atmos for home theater relies on bitstream passthrough, not channel-based layouts. The speaker configuration (like 7.1.4) is handled externally by the decoder (soundbar/AVR), not Windows.

If full detection is required (for broader Atmos behavior), use a direct connection where possible: PC > Atmos-capable soundbar / AVR (HDMI input). This allows Windows to detect Atmos capability directly from the audio device.
Aaron Leonrdo 0 Reputation points

2026-06-04T00:47:19.5066667+00:00

I know Atmos is only in bitstream, y thing was more about when mixing in Nuendo/Dolby Atmos renderer in Dolby Atmos, it decodes the signal directly with your system settings to your speaker layer, so the final output is in PCM with channel per channel, but as a Windows limitation of only support 7.1 and no more it is impossible to pass 7.1.4 or more channels, you need to first code the audio in bitstream and the pass the Atmos workflow to the HDMI but as I said it does not make again the mix, is difficult to me pass the ASIO to again the WASAPI and after the Dolby Access make the work again, however, for anyone seeing this and only wanting to listen Apple Music/TV or other Atmos content with this new adjustments (or without it for me, also) now you can listen to real Atmos through your system with doing anything more. :)
Aaron Leonrdo 0 Reputation points

2026-06-04T00:51:54.7033333+00:00

It would be cool if Windows add support to 9.0.6 speaker layers or 7.1.6 or 9.1.4, something like that that can be encoded to TrueHD/E-AC-3 (as they are able to encode up to 15 channels) in real-time (with Dolby Access) or live as Nuendo gives it, to can have the possibility to use HDMI for monitoring instead of the too pricey alternatives our there. It could only function with Dolby codecs if you bought them (explicitly or implicitly with your TV, pc or something in the chain), or in PCM (yet less common) if you don't own them (a license).
Hendrix-V 15,345 Reputation points Microsoft External Staff Moderator

2026-06-04T01:08:04.6366667+00:00

Hi Aaron Leonrdo,

I'm relieved to know that everything is good to go on your side - the setup is valid and suitable for games / general surround. I hope the insights shared in the forum help address your concerns effectively.

Answer 1

Hi Aaron Leonrdo,

The “Dolby Atmos for home theater” option only appears when Windows detects a compatible HDMI audio device that supports Dolby Atmos. If the current output device doesn’t report Atmos capability, the option will not be shown.

Here are some possible checking steps that you can try at this point:

1, Verify your audio hardware

Make sure your soundbar/AVR/TV explicitly supports Dolby Atmos
Basic 5.1 systems (Dolby Digital only) will not show this option

2, Check your connection setup

Recommended connection: PC > Atmos soundbar / AVR > TV
Avoid routing audio first through the TV (ARC), as it may limit formats

3, Confirm you are using HDMI output

Go to Settings > System > Sound
Select your HDMI audio device (not Realtek or speakers)

4, Avoid unsupported outputs

Optical/SPDIF connections do not support Atmos, so the option will not appear

If the option is missing, it typically means Windows cannot detect an Atmos-capable HDMI device in your current setup. Once a supported device is connected correctly, the option should appear automatically.

Let me know if you need further assistance, feel free to ask me by clicking "Add Comment" or "Add Answer" if you cannot add comment so your response will be visible. Thanks for your effort.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Aaron Leonrdo 0 Reputation points

2026-06-03T17:12:30.2033333+00:00

Hi, my setup explicitly supports Dolby Atmos. I know the recommended configuration is to connect first to the soundbar but my soundbar does not have hdmi out, by the way the TV makes passthrough, with my PS5 it plays Dolby Atmos.

The audio devices is set to LG TV SCCS2 (NVIDIA High Definicion Device) via HDMI 2.1.

It is an EDID problem

Answer 2

"Dolby Atmos for home theater" only remains available in Windows when the end-to-end audio path reports that it can accept a home-theater Atmos bitstream. If that capability is not reliably reported or maintained, Windows falls back to headphone/virtualization formats such as Windows Sonic for Headphones and Dolby Atmos for Headphones.

From the spatial sound platform behavior:

The actual output format is selected by the user but is constrained by what the connected device reports as supported.
Spatial sound with Microsoft Spatial Sound supports TVs, home theaters, and sound bars that support Dolby Atmos; otherwise, only headphone formats (Windows Sonic, Dolby Atmos for Headphones, DTS Headphone:X) are available.

In this scenario:

The brief appearance of all spatial formats indicates that, during device initialization, Windows initially sees a capability set that includes home-theater Atmos formats (for HDMI/eARC).
After the HDMI/EDID/eARC negotiation completes between laptop → LG TV → Sonos Beam, the final reported capabilities no longer include a supported home-theater Atmos endpoint for Windows Spatial Sound, so Windows hides "Dolby Atmos for home theater" and similar HDMI-based options, leaving only headphone-based formats.
Because of this, Dolby Access cannot keep a live-encode/upmix path active for home-theater Atmos; playback apps like VLC or MPC-HC can still bitstream Atmos directly to the TV/Sonos, but Windows’ spatial sound processing and Dolby Access effects are bypassed.

To use "Dolby Atmos for home theater" from Windows Spatial Sound, the HDMI/eARC chain must present a compatible Atmos home-theater endpoint to Windows. If that does not happen, Windows will only offer headphone spatial formats and will not allow PC-side live upmix or Dolby Access processing for the home-theater path.

References:

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Why does not appear the "Dolby Atmos for home theater" option?

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