THE SHOULDER

HELLO, I have read in claudio Arrau book (if I understood correcly) that in order to play forte you should release more of the holding of the arm by the shoulder and in order to play piano there is more of a hold...is this true? if not ,then what controls the making of the forte sound in scales playing and not chords playing...?

Arrau here gives us his subjective experience, which he has because of his Arm Weight training. It is not at all necessary to feel any of the things he describes to achieve these effects, although it is possible that you will. I find the description more misleading than anything else, and yet I do see the wisdom of it - for someone in a certain frame of mind. Remember, it is not weight at all that produces our sound but ACTIVITY. AFF