Barco ICMP-X with CP950A Atmos gotcha

[Leo Enticknap]

Thought this would be worth writing up, as it cost me a couple of hours and resulted in a few expletives.

I'm installing a CP950A with an ICMP-X (in a new SP4K), in an Atmos house. After the initial configuration, I hit a problem whereby the ICMP-X wouldn't see the Atmos promo DCPs (Leaf, Amaze, Shattered, etc.) on the drive I carry around in my toolbox. I have used that drive to ingest into countless other ICMPs, and this one saw all the non-Atmos DCPs on it; but the Atmos ones just didn't appear. When I put a couple of them on a separate drive, the ICMP counted the files in the ingest tab, but then said "No content" when it had done so.

After a lot of wailing and gnashing of teeth, the reason turned out to be a new feature in the CP950A software/firmware bundle version 2.3.2.5, whereby in an Atmos configuration, you have to tell it what make of DCP server the input to the cat1710 board is connected to, as so:

image.png

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Note that the release notes contain an error: this field is not in the Atmos Connect Protocol field (network > Dolby Atmos connect), but rather in system > preferences.

Anyways, once I'd set this field and rebooted both devices, the ICMP-X saw the Atmos DCPs, ingested them, and played them. The encrypted content tester also played OK. So for anyone updating a CP950A in an Atmos house from an earlier version to 2.3.2.5, you have to do this extra step afterwards.

[Carsten Kurz]

Strange. Why/how could a CP950 setting prevent an ICMP from seeing content?

[Leo Enticknap]

The only reason I can think of is that the ICMP-X will only see IAB CPLs and offer them for ingestion if it has a valid and open connection to an IAB decoder. The CP950A on the earlier software versions didn't need to be told what model of server/media block it was being fed by, but after this new version was installed, the connection was broken until it had been told that it was connected to a Barco.

I can't remember if, when I've connected my drive of test DCPs to ICMPs that were not in an Atmos house, it saw the Atmos DCPs on it and offered them for ingestion or not. I wouldn't have been looking for them, and therefore likely wouldn't have noticed if they didn't appear. Given that most IAB DCPs also have conventional PCM audio on them for backup, I guess this could be a problem if a non-Atmos house tries to ingest an Atmos plus PCM feature, if that explanation is the right one.

[Steve Guttag]

So, is the only brand that they didn't specifically list (in current production) is GDC? They might as well call mode 1 Barco, Mode 2 Sony and Mode 3 Qube. I guess they don't want to put any other brand names into the software itself.

[Ryan Gallagher]

Note that the release notes contain an error: this field is not in the Atmos Connect Protocol field (network > Dolby Atmos connect), but rather in system > preferences.

I wonder if they meant "under" literally there... as in you'll find it below the or associated with the atmos connect selection in your screenshot.

But yeah, usually I read "under" in such documents as under in the nav tree. Under "preferences" for sure.

Our DCP2K4 definitely sees atmos and IAB content and permits ingestion... even HDR stuff too, but there is no IMB or 950A here so that would be expected.

[Magnus Eriksson]

What web browser did you use?

[Carsten Kurz]

I regularly ingest and play ATMOS DCPs on our non-ATMOS Sony system. I never tried ingesting ATMOS CPLs on our ICMP system next to it. Will have a look.