I was aware that there was algorithmic expansion that could be done, but I did think it was a maximum of 12 real channels (L, C, R, SL, SR, RL, RR, sub, 4x overheads)

What are the other 4? Do they add channels between the ear height and overheads?

[–] [email protected] 5 points 5 months ago

It depends on the version of atmos.

Full fat cinema atmos can scale to (iirc) 512 channels. (Things may have changed since I last was involved!)

In that case, it's a 7.1 bed, and all the other channels are effectively coordinates in the room, and the processor steers objects between them in real time, rather than having defined tracks.

[–] [email protected] 3 points 5 months ago (1 children)

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

[–] SkunkWorkz 3 points 5 months ago* (last edited 5 months ago)

I think those are purely object based channels that a TrueHD receiver can’t use. So that’s for audio sources that will be added across the other channels and subtract where necessary to remove duplicate sounds.