Really, he doesn't know, but if I HAD a bigger organ (more than, ahem, a 3-rank Moller...) it would most certainly be louder than it is now!
I was planning on blogging on how interesting that was that people thought that this other organist played too loud...but then, I just happened to be talking to another person who goes to this other parish, and they are not necessarily musically inclined, but they told me that they did NOT think that their organist was too loud, (that in fact, they loved the postludes after Mass.)
So...is loudness relative? I wish my organ could be louder. How I long for a Trompette en Chamade for the final, rousing verse on Easter Sunday morning! But perhaps my parishioners have just gotten used to my organ being quieter than a much bigger organ in a much bigger church?
I've heard lots of stories about parishioners at other churches complaining about the organ being too loud. Apparently, mine don't complain b/c the organ CAN'T get as loud as I want it! (well, once I had someone tell me that. but they go to the least crowded Mass, so the sound isn't absorbed by the people, and there is no choir singing, just me, so I should just sing louder. Their actual complaint was that they can't hear ME singing.)
So the problem is, how can the organist tell how loud is too loud, since we are up in the loft, and can never test out the sound on a full church?