For me I have always visualised volume as parts of the body. The weight of the body increasing the strength of the fingers. pppp would be finger tips, each knuckle ppp, pp,p. Except the thumb of course, mf/mp is from within the hand, wrist is f, forearm is ff, shoulder fff and back ffff. So if you feel energy coming from the arms you will naturally play loudly. Most people fall into the trap in letting the BLACK NOTES of the piano go above the palm. As soon as this happens control of the quieter sounds is reduced. Generally you should always ensure that if you where to slide your hand into the piano the black notes will comfortably touch your palm. Of course if you have big chords to stretch this idea is somewhat relaxed.There is a lot of things which could contribute to someones TENSION while playing. Most of the times I have found it is inappropriate lifting and droping of the hand. If you look closely to HOW are you lifting your hand and should the next note be controlled with a controlled placed hand or a dropped hand with the weight coming from wherever you wish.
For me I have always visualised volume as parts of the body. The weight of the body increasing the strength of the fingers. pppp would be finger tips, each knuckle ppp, pp,p. Except the thumb of course, mf/mp is from within the hand, wrist is f, forearm is ff, shoulder fff and back ffff. So if you feel energy coming from the arms you will naturally play loudly.
So in that case, you would not be able to use arm weight on a soft cord?
I just recently discovered w/ myself that while playing, weight coming from the arms, and shoulder is bad as it makes the touch harsh. All weight must rest into the hands/fingers more specifically. Is there any ways to relax more the arms and shoulders?