The First Principles Of Pianoforte Playing

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THE ACTIONS AND INACTIONS.                        69
ployed during the act of key-depression) is however even more important than choice of Touch-movement.
There are three main forms of such combination; forming Three Species of Touch-formation or construction :
i): Finger-exertion alone, with passive Hand and self-supported Arm.
2): Hand-exertion behind the Finger-exertion, with self-supported Arm.
3): Arm-weight (etc.) released in conjunction with the Finger-and-hand exertion.1
w): The weight of the arm, thus required for the " Added-impetus," is obtained by omitting its self-support for the time.
The whole arm must be released from the shoulder (to the necessary extent), not the Fore-arm only.          Movement of the
arm, is moreover no guarantee that it is really descending of its own weight.
x): Arm-weight thus employed in the form of "Added-imĀ­petus " during the act of tone-production, must cease to bear upon the key the moment sound is reached; but we must not cause this cessation, by trying to lift the arm off the keys. On the contrary, the arm must be made to resume its self-support automatically. This it will do, if we "leave it in the lurch," at the Wrist, by promptly ceasing all work of the finger and hand against the key, the moment that sound is reached.
y): The continuous weight required to form the second (or slightly heavier) kind of " Resting," upon which depends the effect of Tenuto and Legato, is obtained in the same way: A very slight release of the -whole arm suffices; not dis-continuous as for the Added-impetus, but here continuous, and no greater than just sufficient to overbalance the key into descent.
z): This same process also forms the absolute-pp Weight touch.
1 This all-important matter, the muscular-construction of the act of Touch In its Three main Species, and the Varieties of these, is more fully dealt with fa Chapter XIX., which see.
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