Ohnwy61, please read my comment again: ***The easily identified, inherent, signature sound of Carnegie Hall (or any other hall) swamps any deviation caused by humidity, number of attendees, etc.***
I know how much some dislike the idea of absolutes, but this is an absolute fact. I never said that the sound is not changed by wether the hall is full or not; of course it does. What I am saying is that the change does not in any way cause the listener to not be able to identify the hall as being Carnegie; and easily. The hall's inherent sound is much more powerful than any change caused by the number of people in the the seats. From that standpoint, yes it's subtle. I have performed on that stage upwards of one hundred times in all my years as a musician. Almost everyone of those occasions involved a dress rehearsal or soundcheck prior to the performance, so I was able to hear the hall empty, and then full, during the span of a few hours at most. I can say unequivocally that not once have I felt that the difference in sound was anywhere near the difference in sound between two different halls. Moreover, if one could quantify this sort of thing, I assure you that the differences we are talking about are less than the differences we, as audiophiles, agonize over when choosing interconnects; in which case we could be talking about significant changes in tonal balance, and amount of detail heard. The difference is there to be sure, and important, but not to the point that the Carnegie sound could not be used as a reference. That was my point. Think of it this way: If your spouse has a slight cold, and she leaves you a message on your voice mail, are you all of sudden unable to tell it was he/she calling? You are intimately familiar with the sound of her voice; it remains a valid reference.