I believe AMC is one of the few chains to include 8-channel SDDS in the largest auditoriums of all their megaplexes. (Typically 2 to 4 screens each of new builds).
And I hope the SDDS track is actually used every performance. I've seen a couple of films advertised in the Mann directory as being in 8-channel SDDS one was "The Perfect Storm") yet the theatre was running the film through their SRD penthouse with the SDDS equipment turned off. When the Chinese...