Thanks for this but can a 5.1 (6 channel source) provide Atmos to more than 6 speakers on our Theatre Atmos system? Would it contain sound to 7.1.2 speakers? Or only to 5.1 speakers and if the latter it wouldn’t be Atmos would it? ?

I suppose (cannot see why) that a 5.1 file that is non-Atmos will distribute sound upwards to a higher sound distribution. i.e a hard 5.1 file can only be a 5.1 sound or less. A hard 5.1 cannot move up to 7.2.4 as it does not have the information.

With the Theatre, it may be possible (I have not tried) to play a hard 5.1 file and assign the surround sides and surround backs to the same channels. i.e. a 7.1 system but sides and backs are assigned the same channel (surround sides) to become 5.1 but 4 loudspeakers play the side/back combination. This would be messy sound and ask why would you?

Im still waiting for a pair of RJ45 B&O splitters so I can move to 5.2.4 (on 5.2.2). Hopefully they will arrive today.

One interesting fact - and this goes back to some earlier discussions on Dolby Atmos and DTS-X.

Dolby Atmos has a set of designated height channels as standard. DTS-X does not.

However, the way the Theatre and Room-Sense works is initially, when setting up my 5.2.2, (please note, I designate my system as x.2.y because of the BL90 "subs"),  the system recognised it as 7.2.

Therefore, with the Theatre, you have to designate the two new channels as height channels - almost like it calibrates like DTS-X?

Mr 10 Procent, which of these are the one that looks like your setup

BeoMedia,

I referred to a hard 5.1 as a non-Atmos surround file (I dont know the correct name but refer to it as immutable). At Atmos file is (I believe by specification) mutable (i.e. soft) that it can go from as many channels and objects it was recorded (say 11.4.6 with 50 tracked objects) and emulate down to the common base of available hardware. i.e. 5.1. It is still Atmos but is not as subtle or spacial as an 11.4.6 system (obviously). This is why I guess fixed array soundbars are sold as Atmos soundbars?

Speaker allocation can be edited as follows:-

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What source is showing as 5.1 Atmos? (showing in the app under Signal Info - Input signal).

I'm assuming that this is where you are seeing the source showing as "5.1 Atmos"

I think it works like this

Product Settings >> Signal Info >>

Channel Allocation - if this is an Atmos - it will show as Atmos. May be Dolby Digital Plus (say Amazon or Netflix)

CODEC - Dolby TrueHD (Atmos is an extension to DTHD)

Output Channel Allocation - 5.0.2  (The number of speakers)

Output Channel Processing - TrueImage (think the is B&Os emulation driver to upmix and downmix automatically)

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link

Mr 10 Procent, which of these are the one that looks like your setup Dolby Atmos Speaker Setup Guides – Dolby As it sounds for me that you use the BL 3 as Height speakers and not Overhead speakers. So you are creating some form of 7.2.0 and not 5.2.2

I have 3 pairs of BL3's a pair of BL90s and the Theatre. The living room is quite small at approx 7m wide but only 4.5m deep. It has a high-vaulted ceiling apexing 6-7m high. Initially (hence the diagram), I was looking to install 2 BS Shapes (2 Amps, 4 covered Speakers on the inclined ceiling. I also wanted to improve the sound in my "office" which had a pair of BL3's. I ended up buying another used pair of BL3 whites and a pair of BL17's which ended up in the office. I purchased some stainless steel flat bar (16mm wide, 3 or 4mm thick) and drilled out holes so I could a) mount the speaker with a clear polyurethane sticky pad) to the bar at 35 degree down angle (BL3 bolt holes were ideal) and b) mount the bar (screw down) to a 75mm parapet wooden board between the wall and the inclined ceiling. On the right-side, there is a small mezzanine making it even easier. All cables hidden. This option worked out half the cost of the BS Shape combination and significantly easier to work the cables and install. I cant mount (nor do I want to) the front heights over the BL90s but in 5.2.2 it seems to work OK. Again, I qualify my system as a X.2.Y because of the BL90 Subs. I definitely dont need 3 x BL19's to "have Atmos" and the bass. The walls bend enough as it is. Login to view image

This is reasonably close to my configuration.

https://www.dolby.com/about/support/guide/speaker-setup-guides/5.1.4-overhead-speaker-setup-guide/

The lower surrounds are tending more to the 100deg angle

The rear heights are above lower surrounds but 2.0m higher.