Return your piano to its once perfect working order, restoring the touch and sound to optimal consistency across all of the notes. It may involve adjusting a screw to replacing a pin, or sanding wooden surfaces.
When the hammer disengages the jack. Essential to achieving pianissimo and to play powerful compositions.
The distance the hammers move after let-off.
For grand pianos, it controls how quickly the hammer returns to its original position, stopping double strikes and allowing for rapid controls.
The resistance found in each key when engaged