For crowd sound in 'Lord of the Rings' they recorded the crowd at stadium cricket game during half time!
Hehehehe....I was Orc number 3,785: if you listen really carefully you probably won't be able to hear me quite distinctly. Oh...and the BlackCaps won, by the way.
And I find Haematohm from OhmForce can be good for crowd or choir vocals...you have to really fine-tune the parameters, but it works well...it will give you a whole bunch of pitched voices in one go, as long as the pitch amount is only small.
