10 years ago by
A Pianist
Very well said.
As long as you go down far enough to let the escape mechanism work, that's the beauty of the grand piano--you don't have to play all the way to the keybed, or let the key come all the way back to the top, before it's ready to be played again. --you may not know, but these points can be adjusted, to suit your style of playing and what you are playing.
I do need to point out one thing that I think is a misconception.
You say it takes only a few grams to make the key go. That's not quite true.
On most grand pianos, it's somewhere around 52 grams to get the jack to escape.
If you play slowly, it's a trivial amount of force (not weight) to get the key to move down. However, when played quickly, this force to move the action of the key can be 100x that of what you use to do a nice, adagio, legato.
You can prove this to yourself:
Take a sheet of paper, hold it out, gently and slowly strike it with a finger.
It moves,right? It moves down with the finger movement and you feel it hardly at all.
Now, speed things up.
Try striking it as quickly as you can and repeat that a few time.
Do you notice how much more effort it takes to get the paper to move, when going fast.
In the piano (as well as a law of physics) inertia--the stationary mass of the action, takes a certain amount of force to move it. When the mass is to be moved slowly, the force to change it's direction is not as much as it is to set it into motion when you need to have it change its direction quickly (from static to one of motion "dynamic").
Two pianos can take the same amount of grams to move the key down, but because of the inertia required, if one piano action is regulated to concert level and the other just "ordinary," the one not regulated so well will feel like you are trying to push a tank; whereas the good one, will fly almost effortlessly. And this will really be felt, as well as get in the way of what you are trying to do.
This is called the "touchweight" of the piano. this is not the weight it takes to depress the key, but the amount of force you have to apply to break to overcome the inertia of the action mechanism.
So, when you say it seems to take a lot of effort, but think it's only a few grams, yes it's only a few grams to move the key, but as you speed up, the force needed to move those grams goes up incredibly.
Having the skeletal parts all in line and working, no doubt gives you maximum control; but this can be hampered by the piano itself.
That's the problem I'm having with mine, right now.
A good piano, will have an action ratio (front of key movement to hammer movement of leverage around 5.5. Five is light, above 6.2 is heavy.
Mine is 6.4 & up.
That extra gram of force (not weight), when called upon to play notes very quickly adds up to taking a lot of strength when you play at speed.
I'm doing the Schubert OP. 90 #4. The mm setting puts the arpeggiated 16ths at 576 notes per minute--that extra gram in the leverage, no matter how good your body is aligned is not only going to cause you to feel it, but quite possibly cause you to not physically be able to get up to the speed that the music calls for.
Most pianos, unless specially prepared, including S&S are not touchweighted--they are only, balanced. It is an expensive and difficult process to do and the manufactures expect the artists to have this done.
When you compare a piano that has the touchweight correct--it flies with very little effort, yet the weight to press the keys down remain the same as the piano which has the touchweight, wrong.
Strange huH? But weight to press the key and force to change the key's inertia are two, very different things.
As I mentioned, I'm working now on my piano, to touchweight it right, & also to where it's most advantageous for me.
The cost will be around $3,000. But since I'm already a piano tech as well as pianist, I can get the cost down to about $1,200 or so. Before a piano can be given a concert regulation, if the touchweight is not set correctly, the regulation cannot be set either.
So, thinking that a few grams of weight to depress the key is not a big deal is not really correct. --the few grams (10 US nickels) to depress a key is not the same as the many grams of force to change the inertia to play a note and move on to another or repeat that one, quickly.
Hope this helps--
Bob