Альтивербовец пишет на этот вопрос вот что:
Q: Might be impossible to pull off, but I wonder how much of a difference it would make when the IR recording happened with an audience present in the halls.
Another thing I wonder, how much is the response of the room linear concerning the IR click's volume i.e. would it make sense to record IRs at different volumes?
A: People absorb more then empty chairs, so basically the room would have less reverb time, almost as if you turn the large reverb time dial a bit back in Altiverb
A room reacts totally linear, this is why convolution works with sampling rooms, it gives the same reaction at low or high input volume.