7.1 LPCM with Sonos Arc Ultra and Samsung TV

I have a few movies rips that have an Atmos 5.1 eAC3 track and a 7.1 eAC3 track.
I’m using Infuse on an Apple TV 4K. Samsung Frame 2024 and an Arc Ultra based setup.

When I choose the Atmos track everything works as intended. I see the logo in the SONOS app. But when I choose the 7.1 track, it gets « downgraded » to stereo PCM as shown in the app.

I’m wondering if it’s a bug? A configuration thing? An incompatibility? Anyw views?

Thanks!

A post was merged into an existing topic: True HD Atmos as PCM Stereo instead of Multichannel