Contributor I

Answered

Sonos Arc Atmos + Roku Ultra

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Recently got a Sonos Arc Surround system and a Roku Ultra to support Atmos. I noticed two options on the Roku Ultra for audio - Autodetect or Auto Pass-through.

I noticed with autodetect it is showing in the Sonos app that it is receiving Atmos signal for every show on netflix and prime, even when I’m almost positive the show should not have Atmos.

When I switch to auto passthrough it seems to only show Atmos signal in the Sonos app for the shows that have Atmos.

I was trying to determine if there is actually a difference in the sound quality for the shows/movies that don’t have Atmos, yet are displaying Atmos signal in the app when I have the settings on roku to autodetect. I feel like the quality may be better but it may be in my mind. Is there anything that the sonos arc could be doing to upgrade the signal or actually produce a higher quality of sound when I have the roku ultra settings set to “autodetect” instead of “auto passthrough”?

Thanks for the help!

Josh

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GuitarSuperstarAnswer

Lead Maestro

@ceiling20 Based on what I’ve read on the Roku forums, it seems like the Auto Detect setting makes the Roku detect the best possible audio the Sonos Arc can handle (which is Dolby Atmos) and tries to convert whatever audio signal it receives up to “Dolby Atmos”. That’s why everything you play with the Auto Detect setting is being detected as Dolby Atmos by the Sonos Arc. So this issue seems like more of a problem with Roku than a problem with Sonos.

I would stick with the Passthrough setting so the Arc plays the correct and original audio signal. But if you think Roku’s converted form of “Dolby Atmos” sounds better to you ears, stick with the Auto Detect setting. At the end of the day, that’s all that really matters.

"Receive with simplicity everything that happens to you." - Rashi

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GuitarSuperstarAnswer

Lead Maestro

@ceiling20 Based on what I’ve read on the Roku forums, it seems like the Auto Detect setting makes the Roku detect the best possible audio the Sonos Arc can handle (which is Dolby Atmos) and tries to convert whatever audio signal it receives up to “Dolby Atmos”. That’s why everything you play with the Auto Detect setting is being detected as Dolby Atmos by the Sonos Arc. So this issue seems like more of a problem with Roku than a problem with Sonos.

I would stick with the Passthrough setting so the Arc plays the correct and original audio signal. But if you think Roku’s converted form of “Dolby Atmos” sounds better to you ears, stick with the Auto Detect setting. At the end of the day, that’s all that really matters.

"Receive with simplicity everything that happens to you." - Rashi

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ceiling20

Avid Contributor I

Thanks @GuitarSuperstar,

I receive your nice narrative ...

"Receive with simplicity everything that happens to you." - Rashi

You are awesome!

... In Partnership and Service,

Raj Dhir

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ceiling20

Avid Contributor I

@GuitarSuperstar,

Roku Auto Sound - ABC News, CNN showing up as Dolby Atmos on Sonos Arc! - unbelievable!

Since Roku Ultra is connected to the TV and the Sonos Arc to the TV via. their appropriate HDMIs, I wonder how the Roku knows about the Sonos Arc as it upgrades the sound it is receiving to ‘Atmos’. Also, Sonos Arc is getting fooled to identify a variant of ‘Atmos’ as Dolby Atmos.

If Sonos, Samsung and Roku are reading this, I hope they can put an end to this nonsense.

Regards.

... In Partnership and Service,

Raj Dhir

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GuitarSuperstar

Lead Maestro

@ceiling20 Set your Roku to passthrough and let it go. It works as it should, and it’s not worth losing sleep over.

"Receive with simplicity everything that happens to you." - Rashi

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ceiling20

Avid Contributor I

Samsung Q90T and Roku Ultra both set to Passthrough - Sonos Arc is showing correct audio in.

Roku is certainly dominating the Sonos Arc - they need to partner instead in the best interests of their user community.

To the next mile …

Regards.

... In Partnership and Service,

Raj Dhir

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