Over the weekend, I spent a full day at a client's house regulating his beautiful Bösendorfer grand piano.
What the heck IS regulation, do you ask? To be honest, when writing the copy for this very website, I struggled coming up with a definition for regulation more than any of my other services.
Part of that is because although it is a critical part of what allows a piano to feel and sound its best, regulation is just not something most people have heard of, kind of like my sister's former job title of "actuarial analyst". But it's also because there's way more to it than what my distilled one sentence definition of "adjusting the many parts of the playing mechanism, called the action, in order to make the touch consistent and optimally responsive" implies.
There are books that make regulation sound relatively simple, follow these steps in this order with these measurements, and voila. Piano, as a machine, functions as it "should." In actuality, regulation is complicated and long process, and while there are measurements and certain steps that must be done at particular points, there is a lot of back and forth to make minute adjustments from previous steps. And while measurements makes for a useful baseline, they don't necessarily result in an instrument with which the player, especially a highly sensitive one, can fully realize the music they want to make.
Pianos are similar to sports cars in this sense, in that a sports car that is adjusted precisely to manufacturer standards is...fine. It works, it does what it should, but there's nothing truly special about it. Now I don't actually know anything about how cars work (I leave that to one of my favorite authors, Maggie Stiefvater), but I DO know that people with sports cars like to modify them to be more fun to drive. That means that mechanics are out there repeatedly tweaking and adjusting the engine, bending the specs in minute, subtle ways that may not necessarily be 100% manufacturer approved, but somehow allow the car to perform better for a particular driver.
Like car drivers, my clients may not know or understand what is going on under the hood (fallboard in this case), and because regulation is not a commonly known term, may not know that touch of piano can be adjusted. But oftentimes when I show up for a tuning, they know to ask "what if."
It's true some things in a piano are immutable and measurements can only be tweaked so far before the functioning of the playing mechanism goes downhill.