Muffeld sound from rears during Tv 2.0

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So, I've got the Arc and Sub, connected to a LG C9, and input via Apple Tv 4K. Just added two Ikea Symfonisk as rears, and it does work, somewhat.

I get nice Atmos, full surround when the input ( as acording to the sonos app ) is 5.1, 7.1 and so on, but when the input is 2.0, I do get some muffeld sound from the rears.

I know this is a "feature" when you are streaming audio to your system, but as far as I can see, it should not do so when recieving input from the Tv.

Is this intended by sonos, and if so, can it be turned off in some hidden setting somewhere?

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G

GuitarSuperstarAnswer

Lead Maestro

This is from Sonos...

”If the source you’re playing isn’t in 5.1 already, your Sonos home theater speakers will perform an audio up-mix of the stereo signal to create a simulated surround sound. This means you’ll still hear most audio out of the front channels, but the rear left and right speakers will play what we determine to be ambient audio. This is most obvious in action scenes and with movies that have intense soundtracks.”

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

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106rallye

You should not be able to really hear these sounds. Is your system configured OK? Did you run a Trueplay?

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GuitarSuperstar

Lead Maestro

You should not be able to really hear these sounds. Is your system configured OK? Did you run a Trueplay?

His system is configured just fine. It is perfectly normal to hear audio from your surrounds when watching stereo 2.0 sources.

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

Ken_Griffiths

This is from Sonos...

”If the source you’re playing isn’t in 5.1 already, your Sonos home theater speakers will perform an audio up-mix of the stereo signal to create a simulated surround sound. This means you’ll still hear most audio out of the front channels, but the rear left and right speakers will play what we determine to be ambient audio. This is most obvious in action scenes and with movies that have intense soundtracks.”

Thank you. Too bad it can’t be turned off though.

Just to add, if you goto the Sonos Arc room settings in ‘Settings/System’ and select ‘Surround Audio’ you will hopefully see that you can toggle off the surround audio (switch top right of screen) or you can adjust the audio level between the TV and surrounds using the ‘TV Level’ slider bar.

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