Originally Posted by m. zillch
Funny how the promotional literature, movie poster, and the retail box made no mention of that "3.1" part, just the 5.1 part.
Through my research I've come to the conclusion that there currently aren't
any 62.2 (64) speaker movie theaters, anywhere, not even at Dolby. In theory, Dolby sanctioned Atmos theaters can have as little as 9.1 speaker feeds to a max
of 62.2. [The largest number of discrete speaker channels currently used in any Atmos theater in the US, that I'm aware of, is said to be 43, but new venues are popping up constantly, so that can change at any moment]. To answer your question theoretically though, "somewhere between 1 and 64", depending on the scene, the movie, the number of objects used, and if
the objects move about, at all
. Many are fixed.
Atmos is pitched to us as [paraphrased] "..and it cleverly scales down easily to 5.1 and 7.1 for smaller systems and venues, with the appropriate speaker mapping", but in truth, the way it is made is just
the opposite, for many, if not most releases, including Taken 2 and Chasing Mavericks. What has been done is the 5.1 or 7.1 sound has been scaled up
, by third party audio engineers/mixers, not
the original mixing artists who then mess with it by simplistically adding, among other things, reverb, delays, "double bussing", and almost haphazardly adding "a few" objects, some moving, some fixed,
assuming they can isolate them from the original mix, that they
think would be appropriate, through a rather bumbling process of trial and error, it would seem:http://designingsound.org/2012/11/ambiences-with-dolby-atmos/
Since, as I already mentioned in my previous post, the information I came to this thread for I've now concluded is considered an industry secret and unanswerable, I'm now gone and unsubscribing.