I went to see a film at an AMC movie theater today. On each of the side walls, there were about 8 speakers while the back wall had about 4(I didn't count so I cant be exact). This is the case in most movie theaters where there are several visible surround speakers. The fronts, center, and subwoofers are hidden behind the screen. With so many speakers, it makes me wonder, how many audio channels typically are there in a movie theater? In home theater systems, it is usually 1 speaker per channel. For movie theaters, I didn't really think that each speaker would have its own channel since that would be a lot of discrete channels. Is it 5.1, 7.1, or something else?