2) Crowd mic'ing can be done several different ways. A pair of small diaphragm condensers on short stands on the edge of stage facing out is simple and common solution for touring bands. It covers mostly the front rows and is easy to deploy. Many houses of worship have a small stereo pair of microphones hung over the crowd. This gets more of the crowd but obviously needs to be rigged and is more expensive to deploy. How big a crowd are you trying to cover?
I do just this. There are a pair of AT gooseneck mics conveniently hidden in fake ferns on the front lip of the stage under the speaker hangs that give just enough congregation and room to the recording matrix.
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