key-block

Updated: May 9, 2025

The right foot-pedal acted first as the piano register, shifting the impact of each hammer to two unisons instead of three; a wooden stop in the right hand key-block permitted the action to be shifted yet further to the right, and reducing the blow to one string only, produced the pianissimo register or una corda of indescribable attractiveness of sound.

Various - Scientific American Supplement, No. 385, May 19, 1883